3.8 Article

Interaction of metal ions in high efficiency seawater hydrogen peroxide production by a carbon-based photocatalyst

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Chemistry, Physical

Dual H2O2 production paths over chemically etched MoS2/FeS2 heterojunction: Maximizing self-sufficient heterogeneous Fenton reaction rate under the neutral condition

Yang Yang et al.

Summary: Sufficient generation of H2O2 is crucial in enhancing self-sufficient heterogeneous Fenton reaction. In this study, dual H2O2 production paths were designed to maximize the yield over H2O2-etched MoS2/FeS2 Z-scheme heterojunction with modified surface. Mechanism studies revealed that H2O2 was generated through two-step single-electron reduction and the internal hole-scavenging effect. The H2O2 yield reached 1.5 mM/g/h in neutral aqueous solution without external hole scavenger, and the degradation performance was comparable to heterogeneous Fenton reaction. This work provides new insights for the design of self-sufficient heterogeneous Fenton system with exceptional degradation performance.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Chemistry, Multidisciplinary

Micro-Batch flow reactor for the photoproduction of H2O2 from water/real seawater

Aswin Gopakumar et al.

Summary: Photocatalytic generation of H2O2 with heterogeneous catalysts has received much attention and various strategies have been utilized to enhance the photocatalytic efficiency. However, the application of these strategies on a large scale is still lacking development. Therefore, the development of a flow photocatalytic strategy is highly necessary. In this study, we have developed a serial micro-batch flow reactor for H2O2 generation, which can easily scale up the reaction to 1L scale with high reproducibility using modified g-C3N4. With this flow reactor, the generated concentration of H2O2 has reached 6.89 mM and 5.89 mM in pure water and seawater, respectively.

JOURNAL OF FLOW CHEMISTRY (2023)

Article Chemistry, Multidisciplinary

Thiophene-Containing Covalent Organic Frameworks for Overall Photocatalytic H2O2 Synthesis in Water and Seawater

Jie-Yu Yue et al.

Summary: In this study, two novel thiophene-containing covalent organic frameworks (TD-COF and TT-COF) were used as catalysts for photocatalytic H2O2 synthesis via indirect 2e(-) ORR and direct 2e(-) WOR pathways. The N-heterocycle modules in COFs were found to regulate the photocatalytic performance of H2O2 production. The TD-COF exhibited high H2O2 production yields in deionized water and natural seawater without sacrificial agents. Computational mechanism studies revealed the primary photoreduction unit and central photooxidation unit for ORR and WOR, respectively. This work provides new insights into using thiophene-containing COFs for efficient photocatalytic H2O2 synthesis.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

Article Chemistry, Physical

Controlled synthesis of hollow carbon ring incorporated g-C3N4 tubes for boosting photocatalytic H2O2 production

Hao Luo et al.

Summary: Solar-driven photocatalytic route for H2O2 production has gained attention. Carbon ring incorporated hollow g-C3N4 tubes (CHCN) with significantly higher H2O2 yield than bulk g-C3N4 were successfully fabricated. The optimized CHCN catalyst demonstrated efficient ORR routes for H2O2 production. This work provides a new strategy for efficient H2O2 formation and explores the mechanism of the ORR process for highly efficient H2O2 generation.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Chemistry, Physical

Multiple heteroatom-doped urea and thiourea-derived polymeric carbon nitride for high-performance visible light-driven photocatalytic O2 reduction to H2O2

Sitan Li et al.

Summary: A K, S, and O co-doped PCN (akut-CN) was successfully synthesized through one-pot polymerization of urea and thiourea in the presence of KCl and NaOH, which exhibited an unprecedentedly high H2O2 production rate of 4.46 mM h-1 under visible light irradiation, about 210 times that of undoped PCN. The heteroatom doping and the incorporation of cyano and hydroxyl groups into akut-CN were found to enhance light absorption, facilitate the separation and transfer of photogenerated charges, and improve the surface electronegativity and the O2 adsorption capacity and strength, thereby boosting the reaction kinetics. This work highlights the great potential of elaborately decorated PCN in photocatalytic O2 reduction to H2O2 and paves the way for decentralized production and application of H2O2.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Chemistry, Applied

Solar-driven seawater production H2O2 catalyzed by hydroxyl functionalized crystalline K-doped g-C3N4 under ambient conditions

Pan-Pan Luo et al.

Summary: In this study, three hydroxyl functionalized crystalline K-doped g-C3N4 materials were synthesized via ionothermal polycondensation. These materials can directly generate H2O2 from seawater under ambient conditions and exhibit efficient recyclability.

APPLIED ORGANOMETALLIC CHEMISTRY (2023)

Article Chemistry, Multidisciplinary

Lignin-Supported Heterogeneous Photocatalyst for the Direct Generation of H2O2 from Seawater

Aswin Gopakumar et al.

Summary: The development of smart and sustainable photocatalysts is crucial for the synthesis of H2O2 due to the increasing global demand. Traditional methods of H2O2 synthesis generate chemical waste and require high energy input, making the direct synthesis of H2O2 from seawater using photocatalysts significant.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Physical

Photocatalytic hydrogen production from seawater under full solar spectrum without sacrificial reagents using TiO2 nanoparticles

Jining Zhang et al.

Summary: The study investigates brookite, anatase, and rutile TiO2 nanoparticles as photocatalysts for seawater splitting, demonstrating that brookite TiO2 exhibits higher efficiency and stability in hydrogen production compared to anatase and rutile TiO2. No Cl2 is detected in the solar hydrogen production from seawater as Cl- ions undergo oxidation and reduction cycles.

NANO RESEARCH (2022)

Article Chemistry, Physical

Highly efficient metal-free catalyst from cellulose for hydrogen peroxide photoproduction instructed by machine learning and transient photovoltage technology

Yan Liu et al.

Summary: This study focuses on the development of a metal-free photocatalyst derived from biomass materials, which demonstrates high efficiency in the photocatalytic production of hydrogen peroxide. By utilizing machine learning and transient photovoltage tests, the synthesis and optimization of the photocatalyst were guided, presenting a novel approach for green photocatalyst design.

NANO RESEARCH (2022)

Article Chemistry, Physical

A metal-free catalyst for the efficient and stable one-step photocatalytic production of pure hydrogen peroxide

Hong Shi et al.

Summary: This study reports a one-step photoproduction method for pure H2O2 solution using a metal-free catalyst, without the addition of sacrificial agents.

CATALYSIS SCIENCE & TECHNOLOGY (2022)

Article Chemistry, Physical

Boosting 2e- oxygen reduction reaction in garland carbon nitride with carbon defects for high-efficient photocatalysis-self-Fenton degradation of 2,4-dichlorophenol

Yang Wu et al.

Summary: A photocatalysis-self-Fenton system was constructed using garland g-C3N4 with carbon defects (GCN-PSFs) for pollutants degradation. Carbon defects in GCN not only improve 2e(-) ORR but also accelerate charge separation, resulting in the generation of abundant HO· radicals for efficient degradation of organic pollutants.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Engineering, Environmental

On-site H2O2 production with amphiphilic g-C3N4 as photocatalyst in a combined photocatalysis-extraction-separation process

Hao Zhang et al.

Summary: This study demonstrates a simple and efficient process for the direct photocatalytic generation and separation of high-concentration H2O2 solution using graphitic carbon nitride and anhydrous oily benzyl alcohol.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Multidisciplinary Sciences

Perylenetetracarboxylic acid nanosheets with internal electric fields and anisotropic charge migration for photocatalytic hydrogen evolution

Yan Guo et al.

Summary: This study synthesized perylenetetracarboxylic acid nanosheets with a thickness of approximately 1.5 nm and demonstrated their activity as highly efficient hydrogen evolution photocatalysts. The introduction of carboxyl groups increased the internal electric fields, promoting charge-carrier separation, and weakened charge-carrier recombination by migrating photogenerated electrons and holes to the edge and plane, respectively. Furthermore, the reduction potential and hydrophilic sites of perylenetetracarboxylic acid were enhanced. This work provides a strategy for designing future efficient photocatalysts.

NATURE COMMUNICATIONS (2022)

Article Chemistry, Physical

In-situ grown N, S co-doped graphene on TiO2 fiber for artificial photosynthesis of H2O2 and mechanism study

Yi Yang et al.

Summary: Artificial photosynthesis is a promising strategy for converting solar energy into environmental-friendly H2O2. In this study, a highly efficient photocatalyst for H2O2 production was developed through dioxygen reduction. The photocatalyst, prepared by doping N and S on graphene onto TiO2 nanofibers, achieved a significantly higher H2O2 yield compared to pure TiO2. This work not only provides a novel approach to enhance photocatalytic performance but also sheds light on the mechanism behind the improved H2O2 production.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Materials Science, Multidisciplinary

S-scheme ZnO/WO 3 heterojunction photocatalyst for efficient H 2 O 2 production

Zicong Jiang et al.

Summary: This study successfully achieved highly efficient photocatalytic production of H2O2 through the design of a step-scheme heterojunction photocatalyst, significantly improving the production rate compared to traditional methods. The results indicate that the photocatalytic H2O2 production process predominantly occurs through a direct reduction pathway. The formation of an interfacial internal electric field (IEF) in the step-scheme heterojunction is attributed to the enhanced photocatalytic H2O2 production activity, promoting the spatial separation of charge carriers and enabling electrons with the strongest reduction power to participate in H2O2 production.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2022)

Article Chemistry, Multidisciplinary

Solar-driven H2O2 production via cooperative auto- and photocatalytic oxidation in fine-tuned reaction media

Byeong Cheul Moon et al.

Summary: This study developed a new reaction design for solar H2O2 production using an organic working solution and a metal-free polymeric photocatalyst. The results showed that the fine modulation of the working solution enhanced the photocatalytic route, resulting in a high production rate and conversion efficiency of H2O2.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

Article Chemistry, Physical

Efficient photocatalytic H2O2 production from oxygen and pure water over graphitic carbon nitride decorated by oxidative red phosphorus

Jingzhen Zhang et al.

Summary: Efficient photocatalytic production of H2O2 in pure water was achieved by decorating graphitic carbon nitride with oxidative red phosphorus, leading to significant enhancement of H2O2 generation compared to pristine GCN. The strategy of utilizing red phosphorus for promoting charge separation while suppressing H2O2 decomposition opens up a new pathway for designing highly active metal-free photocatalysts for solar-to-H2O2 conversion in pure water.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Selective modification of ultra-thin g-C3N4 nanosheets on the (110) facet of Au/BiVO4 for boosting photocatalytic H2O2 production

Haiyang Shi et al.

Summary: In this study, a BiVO4 single crystal with selective comodification of ultra-thin g-C3N4 and Au was prepared for the first time to improve H2O2 production efficiency, achieving excellent performance in H2O2 production.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Optics

Ultra-Bright and Stable Pure Blue Light-Emitting Diode from O, N Co-Doped Carbon Dots

Xiao Wang et al.

Summary: This study presents a method to prepare pure blue LEDs using O, N co-doped carbon dots, demonstrating excellent performance in terms of color purity, high external quantum efficiency, brightness, and current efficiency.

LASER & PHOTONICS REVIEWS (2021)

Article Multidisciplinary Sciences

A metal-free photocatalyst for highly efficient hydrogen peroxide photoproduction in real seawater

Qingyao Wu et al.

Summary: Artificial photosynthesis of H2O2 from water and oxygen has attracted widespread interest, but most photocatalysts face salt-deactivation effects. In this study, a metal-free photocatalyst based on carbon dots was synthesized for H2O2 photoproduction in seawater, showing a significantly higher yield compared to pure polymers. In-depth analysis revealed the active sites and catalytic mechanism of this composite catalyst in seawater, providing a highly efficient and practical catalyst for H2O2 photoproduction.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Physical

In-situ photovoltage transients assisted catalytic study on H2O2 photoproduction over organic molecules modified carbon nitride photocatalyst

Jingjing Cao et al.

Summary: This study demonstrated the high efficient H2O2 photoproduction with terephthalic acid modified carbon nitride hybrids as catalysts, showing great potential for exploring photoelectric interface and properties of catalysts, as well as designing next-generation high-performance photocatalysts. Through in-situ transient photovoltage analysis, a thermodynamic-kinetic model was established to determine catalytic mechanism, kinetics and optimized reaction conditions.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Engineering, Environmental

Charge storage of carbon dot enhances photo-production of H2 and H2O2 over Ni2P/carbon dot catalyst under normal pressure

Yan Liu et al.

Summary: This study demonstrates that carbon dots can stabilize and store photogenerated electrons, promote effective charge separation, and improve the activity and stability of photocatalysts. The Ni2P/CDs composite photocatalyst synthesized in this work can simultaneously produce H-2 and H2O2 under atmospheric conditions with high yields.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Physical

Carbon nitride assisted 2D conductive metal-organic frameworks composite photocatalyst for efficient visible light-driven H2O2 production

Yajie Zhao et al.

Summary: By constructing a C3N4-assisted Ni-CAT composite catalyst, it is possible to produce H2O2 through 2e(-) oxygen reduction reaction under visible light. Ni-CAT serves as the main active component for the oxygen reduction reaction, while C3N4 assists by providing electrons to inhibit carrier recombination.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Carbon nitride nanotubes with in situ grafted hydroxyl groups for highly efficient spontaneous H2O2 production

Liang Zhou et al.

Summary: A novel alkalinization process was used to successfully synthesize g-C3N4 (CN) nanotubes functionalized with surface > OH groups, which provide a large surface area and improved mass transfer properties for efficient H2O2 production. The in situ grafted > OH groups capture photogenerated holes, promoting charge separation and enabling the production of H2O2 without sacrificial agents. This work presents a new strategy for spontaneous H2O2 production using a metal-free CN photocatalyst.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Multidisciplinary

Approaching a high-rate and sustainable production of hydrogen peroxide: oxygen reduction on Co-N-C single-atom electrocatalysts in simulated seawater

Qinglan Zhao et al.

Summary: The study demonstrates the efficient production of H2O2 using cobalt single-atom catalysts in simulated seawater, showing long-term stability and high chloride-endurability. It reveals that the Co-N-5 structure is the main active site for H2O2 formation, offering a promising pathway for large-scale electrocatalytic oxygen reduction in simulated seawater towards energy sustainability.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

Article Chemistry, Physical

Direct design of active catalysts for low temperature oxidative coupling of methane via machine learning and data mining

Junya Ohyama et al.

Summary: By utilizing machine learning and data mining, a direct design of low temperature oxidative coupling of methane (OCM) catalysts was achieved, revealing hidden physical rules behind catalysis and leading to the discovery of new catalysts.

CATALYSIS SCIENCE & TECHNOLOGY (2021)

Review Chemistry, Multidisciplinary

Production of Hydrogen Peroxide by Photocatalytic Processes

Huilin Hou et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Chemistry, Physical

Accelerating Atomic Catalyst Discovery by Theoretical Calculations-Machine Learning Strategy

Mingzi Sun et al.

ADVANCED ENERGY MATERIALS (2020)

Article Multidisciplinary Sciences

Accelerated discovery of CO2 electrocatalysts using active machine learning

Miao Zhong et al.

NATURE (2020)

Article Multidisciplinary Sciences

Prediction of higher-selectivity catalysts by computer-driven worlflow and machine learning

Andrew F. Zahrt et al.

SCIENCE (2019)

Article Chemistry, Multidisciplinary

Water-Soluble Conjugated Molecule for Solar-Driven Hydrogen Evolution from Salt Water

Xiye Yang et al.

ADVANCED FUNCTIONAL MATERIALS (2019)

Article Chemistry, Physical

Efficient Unassisted Overall Photocatalytic Seawater Splitting on GaN-Based Nanowire Arrays

Xiangjiu Guan et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2018)

Article Multidisciplinary Sciences

Palladium-tin catalysts for the direct synthesis of H2O2 with high selectivity

Simon J. Freakley et al.

SCIENCE (2016)

Article Chemistry, Physical

Enabling direct H2O2 production through rational electrocatalyst design

Samira Siahrostami et al.

NATURE MATERIALS (2013)

Article Multidisciplinary Sciences

Switching Off Hydrogen Peroxide Hydrogenation in the Direct Synthesis Process

Jennifer K. Edwards et al.

SCIENCE (2009)

Review Chemistry, Multidisciplinary

Hydrogen peroxide synthesis: An outlook beyond the anthraquinone process

Jose M. Campos-Martin et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2006)