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Summary: Recently, piezoelectric-based catalysis has been proven to be an effective and promising alternative to sunlight-driven photocatalysis. In this study, BiFeO3 nanoparticles demonstrated high efficiency in the degradation of Rhodamine B dye through piezo-degradation, reaching a record degradation rate. To avoid secondary pollution and enable reusability, the nanoparticles were embedded in a polymer matrix. This research opens up new possibilities for the use of BiFeO3 in water cleaning and other applications such as water splitting and CO2 reduction.
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(2023)
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CHEMICAL ENGINEERING JOURNAL
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Summary: A novel biosynthesized SnO2 loaded fluorine-doped tin oxide/ barium titanate (FTO/BTO) thin film was developed for piezo-photocatalytic degradation of organic pollutants and removal of bacteria from water. The thin films were characterized using various spectroscopic techniques and the results showed improved piezo-electrochemical properties and degradation efficiency with SnO2 loading. BaTiO3@0.2%SnO2 also exhibited higher antibacterial activity against gram-negative bacteria than gram-positive bacteria. This study demonstrates the potential of BaTiO3/SnO2 composites as multifunctional catalysts for wastewater treatment by breaking down organic contaminants and removing bacteria.
CERAMICS INTERNATIONAL
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K. Aishwarya et al.
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Summary: This paper introduces a novel metamaterial absorber based on surface plasmon resonance (SPR) that has triple-mode perfect absorption, polarization independence, incident angle insensitivity, tunability, high sensitivity, and a high figure of merit (FOM). The structure of the absorber consists of a graphene array, SiO2 layer, and a gold mirror. The absorber achieves perfect absorption at frequencies of 4.04 THz, 6.76 THz, and 9.40 THz, with absorption peaks of 99.404%, 99.353%, and 99.146%, respectively. It also demonstrates maximum sensitivities in refractive index sensing and has potential applications in photodetectors, optoelectronic devices, and chemical sensors.
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Summary: In this paper, the perfect absorption of the absorbent is achieved by using the surface plasmon resonance (SPR) method. A multi-frequency broadband absorber based on graphene SPR is proposed, which uses the continuous resonance of patterned graphene to achieve multi-frequency broadband absorption. The proposed structure model has potential value for application in terahertz photoelectric detection, filtering, and electromagnetic shielding.
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Summary: A simple two-step method was developed to fabricate ternary heterojunctions of YMnO3/CeO2/MgAl2O4 composite photocatalysts, which exhibited good adsorption capacity and photocatalytic activity. The GA model showed the best predictive ability for the adsorption capacity. The YCM photocatalysts displayed high optical absorption coefficient, charge carrier transfer and separation efficiency, adsorbed oxygen concentration and interface defect, high adsorption capacity, and photocatalytic activity. This study demonstrated the huge potential of YCM composite photocatalysts for eco-friendly adsorption of dye and degradation of drugs.
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(2023)
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Jiao Zhang et al.
Summary: Rational design of heterostructures is an effective strategy for enhancing the photocatalytic activity of semiconductors. In this study, a dual Z-scheme CdS/ZWO/ZnS heterojunction photocatalyst was synthesized by assembling zero-dimensional CdS and ZnS quantum dots onto one-dimensional ZnWO4 nanorods. The photocatalytic experiments demonstrated that the dual Z-scheme heterojunction photocatalyst exhibited significantly higher photodegradation activity compared to individual CdS, ZnS, and binary CdS/ZWO and ZnS/ZWO heterojunctions. The characteristics and photocatalytic mechanism of the CdS/ZWO/ZnS photocatalysts were investigated using various measurement techniques and computational calculations.
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(2023)
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Chaoli Chen et al.
Summary: Hierarchical microspheres of Bi2MoO6 (BMO) were synthesized using a solvothermal method with CTAB as surfactant. The synthesized BMO showed efficient and recyclable adsorption of organic pollutants, as demonstrated by investigating the adsorption kinetics, isotherms, and thermodynamics of methylene blue (MB) onto the BMO adsorbent. The BMO adsorbent can be easily regenerated via calcination in air and exhibits excellent reusability. Further studies showed its adsorption capability in removing various organic pollutants at different pH environments.
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Shijie Li et al.
Summary: Ta3N5/CdS core-shell S-scheme heterojunction nanofibers were prepared by growing CdS nanodots on Ta3N5 nanofibers via a wet-chemical method. These nanofibers exhibit excellent photocatalytic degradation and mineralization performance for tetracycline, as well as efficient photocatalytic reduction performance for Cr(VI). The formation of a favorable core-shell fiber-shaped S-scheme heterostructure with tightly contacted interface and maximum interface contact area ensures effective photo-carrier disintegration and optimal photo-redox capacity, leading to superior photo-redox ability. Furthermore, critical environmental factors and the degradation products of tetracycline were evaluated, and the decrease in eco-toxicity of TC intermediates was confirmed.
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Tao Xian et al.
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Shifa Wang et al.
Summary: Various carbon-based MgAl2O4 (MAO) adsorbents were synthesized using ultrasound irradiation technology and different carbon sources. The optimal synthesis conditions were determined by studying the addition of different carbon types and mass ratios. The adsorption behavior of the carbon-based MAO adsorbents for different dyes and drugs was discussed, and various adsorption isotherm models were studied. The study demonstrated the potential of carbon-based MAO adsorbents as eco-friendly adsorbents for the removal of dyes and drugs.
CERAMICS INTERNATIONAL
(2023)
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Yanying Zhu et al.
Summary: Due to the permanent damage caused by the use of chemical fuels, there is an urgent need for new energy sources. This study proposes a six-layer composite ultra-wideband high-efficiency solar absorber with an annular microstructure, which utilizes the properties of metamaterials and semiconductor materials. The absorber demonstrates high absorption rates in multiple spectral bands, excellent thermal radiation efficiency, and outstanding performance in various applications.
Review
Chemistry, Physical
Liquan Jing et al.
Summary: Photocatalysis and piezocatalysis are important catalytic processes widely used in the fields of energy and environmental restoration. Photocatalysis is limited by the rapid recombination of electron-hole pairs, while piezocatalysis can achieve high-efficiency energy conversion through mechanical energy. Piezo-photocatalysis can combine the advantages of the two to improve catalytic efficiency, but there is still a vast knowledge gap for its design, applications, and prospects.
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Chemistry, Physical
Tingting Cheng et al.
Summary: Researchers successfully constructed core-shell BTO/CdS heterojunction photocatalysts, which exhibit excellent photocatalytic activity in degrading dyes and harmful ions. The enhanced photocatalytic mechanism of BTO/CdS heterojunction photocatalysts was discussed based on a Z-scheme carrier transfer process.
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Summary: In this study, S element was doped into the surface of BTO crystals to enhance their photocatalytic activities in decomposing organic pollutants. The S-doped-BTO samples demonstrated improved visible-light adsorption and separation efficiency of photogenerated electron-hole pairs. Among the different x%S-BTO samples, 3.3%S-BTO showed the highest photocatalytic activity, with a performance 10.1 times higher than that of pristine BTO. The study also investigated the effects of inorganic anions and pH values on the photocatalytic performance of the optimal 3.3%S-BTO, as well as its photodegradation of other organic pollutants. The enhanced photocatalytic mechanism for the S-doped-BTO photocatalysts was proposed and discussed.
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Liexiao Li et al.
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Zichen Wang et al.
Summary: A novel biochar-based piezocatalyst with a nanoflower structure was synthesized for the treatment of antibiotic wastewater. The catalyst showed high efficiency in degrading tetracycline and the degradation pathway was proposed based on intermediate studies. The ecological structure-activity relationship model was used to evaluate the aquatic toxicity migration.
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