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Green H₂O₂ synthesis via melamine-foam supported S-scheme Cd_0.5Zn_0.5In₂S₄/S-doped carbon nitride heterojunction: Synergistic interfacial charge transfer and local photothermal effect

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Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica 2025年第8期41卷

作者： Wang, Weikang Wu, Yadong Zhang, Jianjun Meng, Kai Li, Jinhe Wang, Lele Liu, Qinqin School of Materials Science and Engineering Jiangsu University Jiangsu Province Zhenjiang 212013 China Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences Hubei Province Wuhan 430078 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Province Wuhan 430070 China

Green photocatalytic synthesis of hydrogen peroxide (H2O2) represents a promising alternative to the energy-intensive anthraquinone process, yet it is hindered by rapid carrier recombination and insufficient redox cap... 详细信息

Green photocatalytic synthesis of hydrogen peroxide (H₂O₂) represents a promising alternative to the energy-intensive anthraquinone process, yet it is hindered by rapid carrier recombination and insufficient redox capacity in sacrificial-agent-free systems. This work reports a melamine-foam (MF) supported sulfur (S)-doped carbon nitride (SCN)/S vacancy-modified Cd_0.5Zn_0.5In₂S₄ (CZIS) S-scheme heterojunction (CZIS/SCN/MF) via an in situ chemical bath-hydrothermal method for sacrificial-agent-free H₂O₂ photosynthesis. The S-scheme charge transfer mechanism was confirmed by in situ irradiated X-ray photoelectron spectroscopy, free-radical trapping electron paramagnetic resonance, femtosecond transient absorption spectra and theoretical calculations. Specifically, the sulfur doping could modulate the local charge distribution of the carbon nitride framework to reinforce the interfacial built-in electric field for the CZIS/SCN S-scheme heterojunction. Meanwhile, the calcination-induced S-vacancies in CZIS could serve as photoelectron traps, promoting charge separation, and reserving photoinduced holes for H₂O oxidation, thereby achieving sacrificial-agent-free H₂O₂ synthesis. Coupled with the photothermal effect of MF's three-dimensional porous framework, the CZIS/SCN/MF catalyst with optimized S-doping density and SCN dosage delivers an H₂O₂ production rate of 3.46 mmol g⁻¹ h⁻¹ in pure water, surpassing most of the sacrificial-agent-free systems. This study proposes a novel strategy for synergistic interfacial charge regulation and energy conversion enhancement in sacrificial-agent-free photocatalytic systems. © 2025 College of Chemistry and Molecular Engineering, Peking University

关键词： H2O2 production Melamine foam Photothermal effect S-scheme heterojunction Sacrificial-agent-free

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Dual-Responsive Wavelength Selective Emitter for High-Performance Thermal Camouflage

SSRN

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SSRN 2025年

作者： Ren, Feifei Guan, Huan Han, Kang Gu, Jinxin Chen, Xi Wei, Hang Liang, Shuhui Zhao, Jiupeng Dou, Shuliang Li, Yao Suzhou Laboratory Suzhou215123 China Center for Composite Materials and Structure Harbin Institute of Technology Harbin150001 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China

The precise manipulation of thermal radiation in adaptive infrared thermal camouflage has emerged as a notable challenge, attracting widespread attention in both commercial and military applications. Here, we report a high-performance, dual-responsive device based on a VO2/SiO2/ITO multilayer structure for thermal camouflage. This device exhibits a maximum modulation capability of 0.61 in thermal emissivity, with robust stability over 3000 cycles. Theoretical simulations reveal that its exceptional infrared emissivity regulation originates from the Fabry-Pérot resonance within the VO2/SiO2/ITO configuration. Battery thermal-camouflage experiments validate the device's exceptional thermal camouflage performance with significant reduction in infrared temperature variation, outperforming traditional and passive VO2based systems. This dual-responsive design demonstrates promising potential in artificial infrared camouflage, thermal cloaking, and advanced thermo-optical systems. © 2025, The Authors. All rights reserved.

关键词： Fabry-Perot interferometers

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Organic-inorganic CdS/CBT S-scheme heterojunction with enhanced charge transfer for efficient photocatalytic hydrogen production

InfoScience

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InfoScience 2025年

作者： Wang Wang Yaqi Li Jun Zhu Bei Cheng Song Zhang Guoqiang Luo Jingsan Xu Jiaguo Yu Shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology Wuhan China School of Chemistry and Physics Queensland University of Technology Brisbane Queensland Australia Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences Wuhan China

Owing to its ability to reduce charge recombination and enhance redox capability, the step-scheme (S-scheme) heterojunction has manifested appealing prospect for photocatalysis. In this work, an organic-inorganic S-scheme heterojunction based on CdS nanorods and conjugated polymer 2-hexyl-carbazole-benzothiadiazole (CBT) is constructed. The obtained catalyst exhibited impressive photocatalytic hydrogen production performance (14.02 mmol g −1 h −1 ) with a high apparent quantum efficiency of 5.4% at 420 nm. The charge transfer mechanism and the enhancement of photocatalytic hydrogen production in S-scheme heterojunctions were investigated by density functional theory calculations, in situ X–ray photoelectron spectroscopy, and in situ Kelvin probe force microscopy. The successful construction of organic-inorganic S-scheme heterojunctions and the formation of Cd–S bonds at the interface effectively promoted the separation and transfer of charge carriers.

关键词： charge separation and transfer photocatalytic hydrogen production S-scheme heterojunction

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Atomically dispersed noble metal-O x sites for electrocatalytic chlorine evolution

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Chemical Engineering Journal 2025年 519卷

作者： Chen Chen Baoyi Guo Tingting Liu Ruting Lin Yuyu Liu Qiufeng Huang Xiaofeng Zhang Jiabao Huang Fangren Qian Shengyun Huang Qingjun Chen Xueqin Mu Shichun Mu Zonghua Pu Fujian Key Laboratory of Polymer Materials Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering College of Chemistry & Materials Science Fujian Normal University Fuzhou Fujian 350117 PR China Ganjiang Innovation Academy Key Laboratory of Rare Earths Chinese Academy of Sciences Ganzhou 341000 PR China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 PR China

The electrocatalytic chlorine evolution reaction (CER) plays a crucial role as an anode reaction in the chlor-alkali industrial process. Single-atom catalysts (SACs), characterized by their optimal atom-utilization, have emerged as highly promising catalysts for CER due to their cost-effectiveness, high catalytic activity and selectivity. However, objective evaluating the intrinsic CER activity of these reported SACs remains challenging. Herein, Ir, Pt, Ru single atoms (SAs) coordinated with oxygen (O) atoms are constructed, respectively, by impregnation methods. Electrochemical tests demonstrate that, when these SAs coordinated with O atoms, the CER activity trend is Ru SACs < Pt SACs < Ir SACs. For example, to reach a current density of 10 mA cm −2 , Ir-Co 3 O 4 , Pt-Co 3 O 4 and Ru-Co 3 O 4 need an overpotential of 27, 29 and 39 mV, respectively. In addition, In-situ Raman spectroscopy confirms that all three SACs undergo the CER via a direct Cl-mediated mechanism. Theoretical simulations reveal a Cl adsorption energy that is significantly closer to 0 eV for Ir SACs compared to those of Ru SACs and Pt SACs, providing further support for the excellent intrinsic CER performance of Ir SACs. Therefore, this work unveils the inherent activity trend of atomically dispersed noble metal–O sites in the CER.

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Binary Cations Minimize Energy Loss in the Wide Bandgap Perovskite Towards Efficient All-Perovskite Tandem Solar Cells

SSRN

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SSRN 2023年

作者： Zhang, Kaicheng Liu, Chao Peng, Zijian Li, Chaohui Li, Canru Cerrillo, José Garcia Englhard, Jonas Li, Ning Zhang, Jiyun Tian, Jingjing Du, Tian Sathasivam, Sanjayan Macdonald, Thomas J. These, Albert Le Corre, Vincent M. Forberich, Karen Meng, Wei Osvet, Andres Lüer, Larry Bachmann, Julien Tong, Jinhui Brabec, Christoph J. Department of Materials Science and Engineering Friedrich-Alexander-Universität Erlangen-Nürnberg Martensstrasse 7 Erlangen91058 Germany Immerwahrstrasse 2 Erlangen91058 Germany Chemistry of Thin Film Materials Department of Chemistry and Pharmacy Friedrich-Alexander-Universität Erlangen-Nürnberg IZNF Cauerstrasse 3 Erlangen91058 Germany State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices School of Materials Science and Engineering South China University of Technology 381 Wushan Road Guangzhou510640 China Materials Chemistry Centre Department of Chemistry University College London 20 Gordon Street LondonWC1H 0AJ United Kingdom School of Engineering and Materials Science Queen Mary University of London LondonE1 4NS United Kingdom State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Perovskite-based tandem solar cells, known for their exceptional performance and cost-effective fabrication, are at the forefront of photovoltaic technologies. This study addresses key challenges in enhancing the efficiency and stability of these tandem devices, focusing on the front wide-bandgap perovskite sub-cell. The surface treatment of a 1.80 eV perovskite with binary cations, specifically guanidinium bromide and 4-fluorophenylammonium iodide, proves instrumental in reducing defect densities and mitigating interfacial energy barriers. This treatment significantly suppresses non-radiative recombination and transport losses, resulting in a remarkable open circuit voltage and fill factor (VOC × FF) product of 1.061 V and a notable power conversion efficiency (PCE) of 19.0%. Reproducibility is underscored by consistent results across different lab.ratories. Furthermore, integration with a tin-based narrow-bandgap perovskite yields an all-perovskite tandem device boasting a cutting-edge PCE of 27.2%. This comprehensive exploration of spacer cations’ pivotal role in perovskite surface treatment advances the technology for commercialization. © 2023, The Authors. All rights reserved.

关键词： Perovskite

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Preparation and dielectric properties of high reliability Nano-BaTiO3 Co-doped with Tm2O3 and MgO for BME-MLCC application

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Ceramics International 2025年

作者： Liu, Haizhou Wang, Zhen Wu, Jianjian Guo, Qinghu Yao, Zhonghua Liu, Hanxing Hao, Hua State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering International School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan 528200 China

BaTiO3 has become the most widely used material in MLCC due to its excellent electrical properties. In this work, BaTiO3-x %Tm2O3 (x = 1, 3, 5, 7) and BaTiO3-5 %Tm2O3-y %MgO (y = 0.2, 0.4, 0.6, 0.8) ceramics were prepared by solid-state method in reducing atmosphere and reduction resistance mechanism and dielectric properties of them were investigated. It is confirmed that the Tm³⁺ ion substitutes the Ti⁴⁺ site and significantly improves the reduction resistance of BaTiO3 ceramics when x ≥ 3 with resistivity up to 10¹⁰ Ω•cm. The grain size of BaTiO3-5 %Tm2O3-y %MgO ceramics is reduced to 176 nm, which is beneficial to increase bias stability. The formation of the “core-shell” structure improves the dielectric temperature stability of BaTiO3-based ceramics and a series of X7R (−55 °C–125 °C, temperature coefficient of capacitance (TCC) ≤ ±15 %) ceramics were obtained when x = 5 and y = 0.2–0.6. When x = 5, y = 0.4, the dielectric constant at room temperature is 1610 with a low dielectric loss of 0.009. Combining XPS and TSDC analyses, the reduction resistance mechanism of BaTiO3-5 %Tm2O3-y%MgO ceramics is attributed to the formation of defect dipoles, [2TmTi^′−VO^··] and [MgTi^″−VO^··], due to the cooperation of acceptor ions.

关键词： Anti-reduction BaTiO3 Dielectric temperature stability Resistivity

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Improved dielectric properties and anti-reducing mechanism of Er/Mg Co-doped BaTiO3-based ceramics produced in reducing atmosphere

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Ceramics International 2025年

作者： Zeng, Manting Liu, Xingzhong Hao, Hua Yao, Zhonghua Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

BaTiO3-1.6MnO2-xEr2O3 ceramics (abbreviated as BMT-xEr) and BaTiO3-1.6MnO2-3Er2O3-xMgO ceramics (abbreviated as BEMT-xMg) were prepared under a reducing atmosphere by solid-state synthesis method in this work. The effects of Er/Mg co-doping on phase transformation, microstructure, dielectric properties, and defect were systematically investigated. Research shows that Er-doping reduces the Curie temperature and increases the dielectric constant of BaTiO3 ceramics at low temperatures. Mg-doping refines the grain size and makes the grain size distribution more uniform, which is an important reason for the enhanced bias stability. The substitution of Mg at the B-site generates additional oxygen vacancies which capture free electrons and simultaneously forms defect dipoles. The anti-reducing properties are improved by reducing the carrier concentration. The synergistic effect of co-doping forms defect dipoles such as [MgTi″‐2ErBa∙], [MgTi″‐VO∙∙] and [2ErTi′‐VO∙∙] to enhance dielectric relaxation behavior which is considered to be the reason for the improved dielectric temperature stability. When x = 0.4, optimized dielectric ceramics are obtained with Ε25°C = 1820, tanδ = 0.009, resistivity of 1.0 × 1011 Ω·cm, which meets the EIA X7R standard (−55 °C - 125 °C, TCC ≤ ± 15 %). © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Dielectric properties of solids

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Improved ammonia sensing performance of Nd-modified nano-BaTiO3 at room temperature

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Journal of Alloys and Compounds 2025年 1033卷

作者： Hu, Ruize Hao, Hua Cheng, Jingsai Feng, Feiyang Guo, Qinghu Yao, Zhonghua Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

In this study, BaTiO3 doped with Nd ions (Ba1-xNdxTiO3, x = 0 ∼ 0.02) nanoparticles were prepared by hydrothermal method, and their gas sensitivity to NH3 at room temperature was investigated. Compared with BaTiO3, the particle size of Nd doped BaTiO3 powder decreases and the specific surface area increases. At the same time, the gas-sensitive performance on NH3 is enhanced, which is mostly due to that the increased concentration of oxygen vacancy and adsorbed oxygen promote the reaction between adsorbed oxygen and NH3. At room temperature, the response value of Ba0.996Nd0.004TiO3 to NH3 gas at 50 ppm is about 54 %, and the response time and recovery time are 11 s and 14 s, respectively. The results show that the excellent NH3 gas sensitive property is obtained for Ba1-xNdxTiO3 nanopowder. The adsorption energy, work function and charge density of Ba1-xNdxTiO3 toward NH3 is studied via density functional theory (DFT) based on first-principle. When doped with Nd ion at low concentration, BaTiO3 will be transformed into n-type semiconductor with the decreasing adsorption energy and increasing the electron transfer between NH3 and its surface, which result in the improved gas sensitivity to NH3 at room temperature. This study provides a new method for the preparation and the design of BaTiO3-based NH3 gas sensor. © 2025 Elsevier B.V.

关键词： Nanoparticles

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Transmittance improvement and photocatalyst performance of complex environment tolerant SiO2-TiO2 thin film on photovoltaic glass

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Ceramics International 2025年

作者： Liu, Jiacheng Zhang, Mengya Zhang, Jihong Zhang, Qinghuang Han, Jianjun Xie, Jun Cao, Shaowen State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China Hepu Research Center for Silicate Materials Industry Technology 27 Huanzhu Avenue Hepu County Beihai536100 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China

The transmittance and surface condition of photovoltaic cover glass determine the energy conversion efficiency of specific solar cells modulus. In this study, TiO2-SiO2 based complex thin film were fabricated on PV glass and the transmittance, self-cleaning, and environmental tolerance performances were investigated. TiO2-SiO2 based precursors with different SiO2 contents and additives were prepared using sol-gel method, and coated on photovoltaic glass substrates by spin-coating technique with optimized parameters for thin film fabrication. The microstructure analysis reveals the decreasing rutile TiO2 crystalline with higher SiO2 content in thin film probably due to lower TiO2 content and the formation of Ti-O-Si bond, which impedes TiO2 crystal growth. The morphologies and elements distribution of thin film proves the formation of SiO2/TiO2 core-shell like structure in thin film. The transmittance of coated photovoltaic glass in visible range is improved from 91.60 % to 93.94 %, with optimized TiO2/SiO2 ratio. Accordingly, the monocrystalline silicon solar cell conversion efficiency increases from 16.35 % to 16.68 %, about 0.33 % efficiency increase due to TiO2-SiO2 thin film coating. In addition, the thin film shows excellent photocatalyst behavior from 95.40 % methylene blue dye degradation rate under Xeon lamp irradiation, and super hydrophilic property from 0° contact angle, which confirms the excellent self-cleaning performance. The transmittance of coated photovoltaic glass recovers from less than 80 % with MB simulated pollutant contamination, to 92.97 % after degradation under Xeon lamp irradiation, and the solar cell conversion efficiency changes from 13.15 % to 16.55 %. In addition, the transmittance and solar cell conversion remain almost unchanged after low temperature freezing, and slightly decrease from first time sand scrubbing then keep stable with more cycles. The results indicate the excellent anti-pollution, low temperature tolerance, and wear

关键词： Energy conversion efficiency

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Triethanolamine-mediated photodeposition formation of amorphous Ni-P alloy for improved H2-evolution activity of g-C3N4

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Science China materials 2020年第11期63卷 2215-2227页

作者： Huogen Yu Jiachao Xu Duoduo Gao Jiajie Fan Jiaguo Yu Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Developing efficient,stable,and low-cost novel electron-cocatalysts is crucial for photocatalytic hydrogen evolution ***,amorphous Ni-P alloy particles were successfully modified onto g-C3N4 to construct the Ni-P/g-C3N4 photocatalyst through a simple and green triethanolamine(TEOA)-mediated photodeposition *** was found that the TEOA could serve as an excellent complexing agent to coordinate with Ni2+to form[Ni(TEOA)]^2+complex,which can promote the rapid and effective deposition of amorphous Ni-P alloy on the g-C3N4 *** tests suggest that the hydrogen-evolution performance of gC3N4 can be greatly promoted through integrating amorphous Ni-P ***,the Ni-P/g-C3N4(5 wt%)exhibits the superior H2-generation activity(118.2μmol h^-1g^-1),which is almost 35.8 times that of bare ***,the amorphous Ni-P alloy cocatalyst can also serve as the general hydrogen-production cocatalyst to greatly enhance the photocatalytic performance of traditional semiconductor materials such as Ti O2 and Cd *** on the present results,the mechanism of the amorphous Ni-P alloy as the high-efficiency electron transfer medium was proposed for the boosted H2-generation *** present facile route may broaden the horizons for the efficient development of highly active cocatalysts in photocatalytic field.

关键词： photocatalysis H2evolution g-C3N4 amorphous NiP alloy photodeposition

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