Related references
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Review
Chemistry, Physical
Hang Yang et al.
Summary: Sulfur-containing gaseous contaminant treatment plays a crucial role in the healthy and sustainable development of industry. The conventional methods for H2S or SO2 treatment require large amounts of desiccants and energy consumption. However, the electrochemical coupling system offers a promising solution by converting H2S and SO2 into recyclable substances and transferring the contained energy to more valuable products. This review discusses the mechanism and recent studies on electrochemical removal of H2S and SO2, aiming to address the issues of energy waste and resource recovery in pollutants treatment.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Rudolf Ricka et al.
Summary: Based on the apparent quantum yield, photocatalytic activities are compared under various experimental conditions. However, the assessment of experimental data requires knowledge of the intensity of incident light, which is often different from the emitted light by a radiation source. Many reports provide apparent quantum yields derived from emission intensity, leading to inaccurate and underestimated figures. To address this, the authors measured local light intensity, approximated its spatial distribution, calculated total incident light energy, and compared it with the manufacturer's data. They found that the calculated incident light energy was lower than that provided by the manufacturers of all tested irradiation sources. This refinement resulted in higher apparent quantum yields, even 5 times higher in the case of LED radiation, compared to the values calculated using manufacturer data.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Linyuan Wen et al.
Summary: The single-atom loading of non-precious transition metals (M = Ti, V, Mn, and Fe) on the (100) surface of SrTiO3 (STO) was theoretically studied to assess the hydrogen evolution reaction (HER) with the Gibbs free energy for hydrogen adsorption (Delta GH*). V1-STO showed a competitive Delta GH* value of -0.08 eV, comparable to metallic Pt (-0.09 eV). The d band center explained the primary screening of single-atom non-precious transition metals on STO. Furthermore, strain engineering was utilized to enhance the HER performance of V1-STO. Tensile strain increased Delta GH*, while compressed strain decreased Delta GH*. A new descriptor of the d orbital splitting (epsilon d-gap) was proposed to elucidate the optimization of HER performance due to surface strains. This work introduces a combined strategy to evaluate HER performance and offers guidance for the sequential design of HER catalysts.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Wesley J. McCormick et al.
Summary: Photocatalysis is a rapidly growing technology for the complete degradation of toxic chemicals in water. This study introduces an efficient photocatalytic method, combined with a novel electrochemical monitoring technique, for the degradation of the aquatic pollutant emamectin benzoate. The photocatalytic reactions were conducted using ZnO or TiO2 photocatalysts irradiated with 365 nm UV-LEDs, while electrochemical monitoring was achieved through Square Wave Voltammetry with a boron doped diamond indicator electrode. Various parameters were investigated to optimize the process, and the overall degradation profiles of ZnO and TiO2 were similar.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Shunta Nishioka et al.
Summary: Dye-sensitized H2 evolution systems were constructed using Pt-loaded SrTiO3 and Ru(II) complex photosensitizers. The size of the Pt particles impacted the activity of the system depending on the strength of the electron donor. Larger Pt particles showed higher activity with a stronger electron donor, while smaller Pt particles showed higher activity with a weaker electron donor. The results suggest that the cocatalyst particle size affects the kinetics of electron injection and carrier separation processes.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Ewelina Kusiak-Nejman et al.
Summary: Industrial TiO2 suspension from sulphate technology was used for samples preparation. One sample was directly calcined in an argon stream at 800 C-o. The second one, before the calcination in the same conditions, was modified with APTES in such a way that the final product contained about 2 wt% of silicon. Photocatalysts were tested in the CO2 reduction reaction containing the addition of gaseous nitrogen and water vapour. No activity was observed in the CO2 reduction reaction for a directly calcined sample that mainly consists of a rutile phase. It was found that the addition of silicon prevents the anatase-to-rutile phase transition by forming a Si-O-Ti chain containing the anatase phase and leads to gaseous products: hydrogen, carbon monoxide and methane, and ammonia. The presence of silicon generates paramagnetic recentres with g= 2.0028, which are associated with oxygen vacancies and delocalized electrons. This electronic structure is critical to the photocatalytic reduction of CO2 because the pure rutile phase (without silicon modification) does not reduce CO2, but only the presence of ammonia was found in the products.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Hanna Braun et al.
Summary: Polymeric carbon nitrides (PCN) are sustainable, tunable, non-toxic, and chemically stable materials that show great potential as photocatalysts for light-driven hydrogen peroxide production. However, most studies have used PCN powder suspensions and sacrificial electron donors. In this study, we report the first multicomponent hybrid photocathode based on PCN that can selectively reduce dioxygen to H2O2 under visible light irradiation. Our study demonstrates the intrinsic photocatalytic activity of PCN in H2O2 production and opens up possibilities for the development of more efficient PCN-based photocathodes.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Hong Pang et al.
Summary: In this study, high crystalline zigzag GaN nanowires were successfully synthesized and achieved efficient photocatalytic overall water splitting by constructing polar surface. Compared with non-polar nanowires, the zigzag nanowires showed enhanced H2 and O2 evolution in the presence of sacrificial reagents. This work suggests that constructing polar surface with spatially separated H2 and O2 evolution sites on one-dimensional nanomaterial could be a new crystal engineering strategy for efficient photocatalysts towards overall water splitting.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Idil Arslan-Alaton et al.
Summary: The acute toxic effect of home-made PANI-ZnO nanocomposite photocatalyst samples was investigated and compared with their surrogates PANIEB, PANI-ES, and ZnO. Daphnia magna showed higher sensitivity to the exposure compared to Vibrio fischeri. The toxicity response increased with exposure time for both tested organisms and was mainly due to the presence of ZnO nanoparticles in the PANI-ZnO composites. The acute toxicity also increased after photocatalytic treatment, which was related to the release of Zn(II) ions.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Juan Miguel Jimenez et al.
Summary: The donor properties of atomic hydrogen were used to chemically reduce nanoparticle-based WO3 and TiO2 electrodes, resulting in n-type doping of the semiconductors. A reactor system was designed to allow meticulous materials processing under high vacuum conditions and controlled electrode transfer into an aqueous electrolyte. The activity changes in water photooxidation induced by hydrogen doping were studied. The reduction of monoclinic WO3 electrodes led to increased charge carrier separation at the semiconductor/electrolyte interface. However, bronze formation had a negative effect on the photoelectrocatalytic activity of WO3 electrodes when strongly reduced. For anatase TiO2 nanoparticle films, the de-doping of the reduced film was fast due to the small particle size. The beneficial doping effect was transient. Nonetheless, the small particle size allowed for the estimation of the number and energetic distribution of trapped electrons in hydrogen-doped films.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Kun Jia et al.
Summary: Photocatalytic nonoxidative dehydrogenation of anhydrous methanol is a promising approach for producing formaldehyde and hydrogen without catalyst degradation at high temperature. To improve the efficiency, we propose lowering the barrier height for semiconductor-cocatalyst interfacial electron transfer by adjusting solution acidity, resulting in a greater driving force for photogenerated charge carriers. In our experiment, we achieved a quantum yield of 89.9% and formaldehyde selectivity of 95.5%.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Donia Friedmann
Summary: Transient absorption studies have significantly contributed to our understanding of heterogeneous photocatalytic systems, providing insights into the nature of photogenerated charge carriers, their trapping and subsequent transfer, as well as the transformations and kinetics that occur during the reaction. This review focuses on the application of transient absorption studies in heterogeneous photocatalysis for water pollution remediation, covering the degradation of dyes, organic pollutants, and removal of inorganic pollutants. The majority of the studies have been conducted on TiO2 photocatalysis, but recent research has also explored doped and heterostructured materials, which hold great potential for solar-driven environmental remediation.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Chencheng Dong et al.
Summary: In this study, Mo2C quantum dots enriched N-doped graphitic carbon layers were developed and demonstrated to be highly efficient cocatalyst and/or catalyst in AOPs. The Mo2C QDs/NGCLs showed remarkable removal efficiency for a range of aromatic organic pollutants in hydroxyl radical-based AOPs and sulfate radicals-based AOPs. These findings highlight the potential of transition metal carbides for AOP applications and provide a solid theoretical and technical basis for further research.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Long Chen et al.
Summary: Graphite carbon nitride nanosheets (CNNS) with a thickness of about 1 nm were prepared by stripping and surface modification with Cu(II) cluster. These CNNS can be used to construct photoelectrochemical sensors for p-nitrotoluene monitoring. The sensor showed a linear relationship between the change in photocurrent signal and the logarithm of p-nitrotoluene concentration, indicating its potential for trace detection in water environmental contaminants monitoring. This work provides new insights for the design and construction of efficient and durable photoelectrochemical sensors.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yajing Huang et al.
Summary: A 2D/2D g-C3N4/Bi2WO6 composite photocatalyst was synthesized using a hydrothermal method for the removal of gaseous methyl mercaptan (CH3SH) through photocatalytic oxidation. The CN/BWO structure and the C-O-Bi bonds at the interlayer interface effectively reduced electron/hole pairs recombination, resulting in enhanced photocatalytic efficiency. The 0.1-CN/BWO photocatalyst showed the highest efficiency, outperforming other structures and pure g-C3N4 and Bi2WO6. Reactive species trapping, electron spin resonance, and in situ diffuse reflectance infrared Fourier transform spectroscopy provided insights into the photocatalytic oxidation pathway and mechanism for CH3SH removal. This work is significant in developing efficient and stable photocatalysts for the removal of volatile organic compounds.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Zitong Wang et al.
Summary: Methane, as an important component of natural gas, is a vital raw material in chemical industries, but it is also a potent greenhouse gas with severe global warming effects. The conversion of methane to valuable chemicals and fuels like methanol through photocatalysis, utilizing renewable solar energy, has gained increasing interest due to its low energy consumption and environmental friendliness. This work proposes a perspective on photocatalytic methane oxidation to methanol by analyzing the oxygen source of methanol, which can be a new strategy to modulate the methane oxidation reaction. It provides a new angle to understand the mechanism of the reaction and inspirations for optimizing the efficiency and selectivity of methanol production from photocatalytic methane oxidation.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yajing Zhang et al.
Summary: By integrating solar energy into an electrocatalytic system, a hierarchically structured S-doped NiFe hydroxide/oxide nanomaterial with good oxygen evolution reaction (OER) activity and solar light absorption capability was constructed for efficient hydrogen production in seawater splitting. This work provides a promising strategy to enhance the electrocatalytic reaction by solar energy for seawater electrolysis, which has important implications for efficient hydrogen production.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yan Li et al.
Summary: Ag/CoO-N photocatalyst composites were developed for effective inactivation of A. baumannii. The composites were prepared by N-doping to CoO crystal in supercritical fluid and photo-reduction of Ag under visible-light irradiation. The satisfactory photocatalytic sterilization of A. baumannii was a result of high capability of light trapping and efficient separation of photo-charges. The photo-induced electrons, along with Ag nanoparticles and CoO-N, synergistically caused cell membrane mineralization, leading to K+ ion leakage, decrease in genetic materials, and impairment of self-repair function, ultimately resulting in cell death.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Abdul Zeeshan Khan et al.
Summary: In this study, we report a unique synergy between phosphate ions (Pi) layer and plasmonic gold nanostructures to enhance the photoelectrochemical (PEC) performance of hematite photoanode. The lifetime of the photogenerated holes is improved by 3-fold compared to pristine hematite. The Au/Pi-hematite photoanode exhibits a stable photocurrent of 1.32 mA cm-2 at 1.23 VRHE, which is 3.1, 2.1, and 1.7 times higher than pristine hematite, Au/hematite, and Pi-modified hematite photoanodes, respectively. Au nanostructures not only enhance light absorption ability but also improve charge transfer efficiency.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Dedong Zeng et al.
Summary: Novel Tb4O7/CN heterojunctions with a sandwich structure were successfully prepared via a simple one-step calcination method. The introduction of Tb4O7 promotes the separation and transport of photoexcited charge carrier, and increases the specific surface area, light utilization, and hydrogen evolution activity. This research offers insights for developing rare earth oxide and CN heterojunctions.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Wenyuan Liang et al.
Summary: Hydrogen production using oxygen transport membrane reactors is a hot research topic, but the stability of membrane materials in harsh reducing atmospheres remains a challenge. In this study, a 2 mol.% cobalt-doped Ce0.8Gd0.2O2-8 (CoCGO) ultrathin membrane was successfully fabricated and applied for hydrogen production from water splitting (WS) and simultaneous syngas production through partial oxidation of methane (POM). Two catalysts, La0.4Sr0.6CoO3-8 (LSC) and Ni/Al2O3, were used to promote WS and POM, respectively. The results showed a hydrogen production rate above 1.8 mL min-1 cm-2 and methane conversion of around 80%, with no noticeable degradation during 100 hours of operation, indicating its potential stability advantages as a membrane reactor for hydrogen production from water.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yi-Tian Wang et al.
Summary: The synergistic effect of acid/Pd dual sites in TS-1 on styrene oxidation has been investigated using a Pd@TS-1 confined catalyst with a mesoporous silica shell. The experimental results show an enhanced conversion rate (19.2%) and selectivity (74.7%) due to the synergy between metals and acidic sites. The interaction between Pd and TS-1 has been studied using EPR and 1H NMR techniques, revealing changes in the signal distribution of weakly acidic terminal hydroxyls and hydrogen-bonding silanols.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Seung Yo Choi et al.
Summary: This study synthesized heterojunction CuO and CuFeO2 (CFO) films via electrodeposition on Ti and Ni-deposited transparent conducting substrates and examined their photoelectrochemical behavior and unassisted photo-catalytic activities for CO2 conversion in aqueous bicarbonate solutions at circumneutral pH. The deposition of metal layers increased the electrical conductivity of the substrate, improving the deposition kinetics and establishing firm contact between CFO and the substrate. CFO films with Ti and Ni underlayers exhibited higher photocurrent generation and produced mixed C1-C4 chemicals, while bare CFO film only produced the C1 chemical.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Mathias Jacobs et al.
Summary: Photo-assisted methanol reforming was used to produce hydrogen as an alternative to catalytic steam reforming. 1wt.% Au/TiO2 was used as a photocatalyst and immobilized on beads or plates. The optimized system showed significantly higher hydrogen production compared to previous studies using beads as catalyst support, and it was also more energy efficient.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Morten Weiss et al.
Summary: We thoroughly investigated copper niobium oxides and synthesized six different phase-pure and highly crystalline oxides. These materials have small band gaps and can absorb visible light, making them promising for semiconductor photocatalysis. They also have better chemical stability compared to binary copper oxides.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yamen AlSalka et al.
Summary: Global industrial development and increased energy demand are driving forces behind rising CO2 emissions and global climate change. To address this, it is important to establish a sustainable energy infrastructure based on renewable energy sources such as hydrogen. This mini-review focuses on H2 generation methods, with a focus on photocatalysis using TiO2 as a widely used photocatalyst. Material engineering techniques, including self-doping, co-catalyst loading, and heterojunction structures, are also discussed, as are external conditions that enhance photocatalytic H2 production.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Qianqian Ba et al.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Mohsen Padervand et al.
Summary: Over the past few decades, biological hazards and organic pollution have become major environmental concerns. Photocatalysis has been found to be effective in minimizing their negative impacts. In this study, lozenge shape Ag/AgCl/ZnTiO3 photocatalysts were synthesized and demonstrated excellent catalytic performance in the degradation of nitrophenols and the conversion of CO2 to CO/CH(4). The presence of Ag/AgCl component in the ternary construction contributed to the enhanced catalytic effects. Additionally, this study successfully applied the prepared photocatalysts to treat hazardous biological waste containing cancer cells and showed promising results in inhibiting tumor growth.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
James Johnston et al.
Summary: In this study, photoinduced absorption spectroscopy combined with measurement of dissolved oxygen was used to investigate the kinetics of water oxidation by periodate under photocatalytic conditions. The results showed that the rate of photocatalysed oxidation of water was influenced by the concentration of dissolved oxygen and the intensity of UV irradiation. Photoinduced absorption spectroscopy provided a direct measurement of the steady-state concentration of photogenerated holes on the surface of the photocatalyst, which could be used to gain insights into the mechanism of photocatalytic reactions.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Aicaijun Zhang et al.
Summary: This study successfully fabricated Pt nanoparticles with excellent dispersion on the surface of the conjugated polymer PyDTDO-3, while maintaining metallic Pt0 species. The optimized Pt/PyDTDO-3 showed notable visible light photocatalytic hydrogen evolution activity and stability. Density functional theory calculations revealed the selective loading of Pt nanoparticles onto the acceptor unit with the lowest adsorption energy and closest bond length. Additionally, the optimized Pt/PyDTDO-3 exhibited high electroconductivity, efficiently capturing and removing photogenerated electrons for effective electron-hole pair separation.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Yazhou Zhang et al.
Summary: This study constructs a composite system of g-C3N4 with LaTiO2N to improve the photocatalytic H2 evolution performance of g-C3N4. By partial coverage of g-C3N4 nanosheets on LaTiO2N surface and the formation of (oxy)nitride heterojunction, the separation of photocarriers is enhanced, leading to enhanced photocatalytic performance.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Maria T. Ayala Ayala et al.
Summary: This study reported the photocatalytic activity of different bismuth-based heterojunctions in aqueous suspension using a black body-like reactor. Photon flux was determined by chemical actinometry, and methanol oxidation was measured as a model compound. The mechanism of charge transfer in the photocatalytic reaction was demonstrated.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Young In Jeon et al.
Summary: TiO2 microtubes with a pore size of around 1.6 μm were synthesized using a solvothermal reaction without templates, showing slightly lower photocatalytic activities than commercial TiO2 NP under UV-visible light but significantly higher activities under visible light after nitrogen-doping treatment.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Dashuai Li et al.
Summary: High concentration VOCs pose a serious threat, and single technologies for their removal are usually limited by low efficiency and mineralization rate. This study developed a coupled photo-plasma catalytic technology that achieved superior degradation and mineralization of VOCs compared to traditional methods.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Yanda Wong et al.
Summary: In this study, TiO2 coatings were produced on window glass using an aerosol-assisted method. The impact of process parameters on the photocatalytic activity of the coatings towards NOx remediation was investigated. It was found that surface roughness, charge carrier population, and charge carrier lifetime were the three most influential factors on the observed activity. Therefore, improving these factors can lead to the rational design of more active coatings for photocatalytic NOx remediation applications.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Kai Zhao et al.
Summary: Enhancing spatial charge separation is an efficient strategy for improving photocatalytic performance. In this study, a ternary GO/MoS2/Ag3PO4 Z-scheme heterostructure photocatalytic system was proposed to promote spatial charge separation at the surface and interface. The ternary photocatalyst exhibited enlarged surface area and improved N-2 photo-fixation efficiency under visible light irradiation, thanks to the decent properties of GO. The synergistic effect of electron transportation on GO and the efficient separation of electron-hole pairs on the heterojunction enabled the transportation and separation of photo-generated charges, leading to better harvest and utilization of light illumination.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Saleh Alofi et al.
Summary: This study models and analyzes the kinetics of stearic acid removal by photocatalytic films using a log-normal distribution. The model is validated using different TiO2 films and the results show a relationship between the distribution in reactivity and the observed order of reaction.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Lucas L. Nascimento et al.
Summary: In this study, nanocrystalline Bi2WO6 photoanodes were used for glycerol conversion at different pH values. The results show that the photocurrent for Bi2WO6 films is independent of the applied potential, and glycerol oxidation is preferred over water oxidation. The photocurrent and product selectivity vary with pH conditions.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Joseph Kinyanjui Muiruri et al.
Summary: Mimicking natural processes like plant photosynthesis requires a deep understanding of molecular building blocks. Bulk photocatalytic materials used in artificial photosynthesis limit CO2 conversion efficiency and yield. However, nanostructured photocatalysts offer hope for improved efficiencies. CO2 conversion to solar fuels and value-added chemicals is a significant scientific advance. Fabrication of novel nanostructured photocatalysts is crucial for CO2 reduction.
APPLIED CATALYSIS A-GENERAL
(2022)
