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Slow Photon-Enhanced Heterojunction Accelerates Photocatalytic Hydrogen Evolution Reaction to Unprecedented Rates

CCS Chemistry 2023年第2期5卷 372-384页

作者： Jing Liu Yin-Hao Guo Zhi-Yi Hu Heng Zhao Ze-Chuan Yu Lihua Chen Yu Li Gustaaf Van Tendeloo Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070 Wuhan Nanostructure Research Centre(NRC) Wuhan University of Technology430070 Wuhan School of Civil Engineering and Architecture Wuhan University of Technology430070 Wuhan EMAT University of AntwerpB-2020 Antwerp Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 Namur

In photocatalysis,both the photogenerated charge separation and transport and the induced light utilization greatly influence *** this work,highly ordered CdS@ZnO core-shell inverse opal(CdS@ZnO-csIO)nanocomposites have been successfully designed as a model to couple the heterojunction system with the slow photon effect for photocatalytic H2 *** calculations and experimentation provide direct evidence for the slow photon effect in the CdS@ZnO-csIO *** type II heterojunction is responsible for promoting the migration and separation of photogenerated charges,and the slow photon effect is in charge of enhancing light harvesting in the CdS@ZnO-csIO *** synergy of two functions gives rise to a significantly enhanced photocatalytic H2 production rate under simulated solar light for the CdS@ZnO-csIO *** highest H2 production rate reaches 48.7 mmol g^(−1)h^(−1)under simulated solar light with the benchmark performance for all reported CdS@ZnO *** work provides proof-of-principle that coupling the heterojunction system with the slow photon effect can greatly enhance the photocatalytic activity of composite photocatalysts.

关键词： type II heterojunction slow photon effect CdS@ZnO nanocomposites 3D core-shell inverse opal nanocomposites photocatalytic H2 production

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Hollow CdS-based photocatalysts

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Journal of Materiomics 2021年第3期7卷 419-439页

作者： Xiangyu Liu Mahmoud Sayed Chuanbiao Bie Bei Cheng Biwei Hu Jiaguo Yu Liuyang Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China Corresponding author.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan430070China.

In recent years,photocatalytic technology,driven by solar energy,has been extensively investigated to ease energy crisis and environmental ***,efficiency and stability of photocatalysts are still *** address these issues,design of advanced photocatalysts is *** sulphide(CdS)nanomaterials are one of the promising *** them,hollow-structured CdS,featured with enhanced light absorption ability,large surface area,abundant active sites for redox reactions,and reduced diffusion distance of photogenerated carriers,reveals a broad application ***,main synthetic strategies and formation mechanism of hollow CdS photocatalysts are ***,we comprehensively discuss the current development of hollow-structured CdS nanomaterials in photocatalytic applications,including H2 production,CO2 reduction and pollutant ***,brief conclusions and perspectives on the challenges and future directions for hollow CdS photocatalysts are proposed.

关键词： Hollow sphere CdS photocatalysts Pollutant degradation Hydrogen production CO2 reduction

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Recent Advances on Graphene Quantum Dots for Electrochemical Energy Storage Devices

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Energy & Environmental materials 2022年第1期5卷 201-214页

作者： Noura Zahir Pierre Magri Wen Luo Jean Jacques Gaumet Philippe Pierrat CNRS L2CM UMR 7053 Universit e de Lorraine LCP-A2MC EA4632 Institut Jean Barriol Universit e de Lorraine State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technologywuhan 430070china

Graphene quantum dots(GQDs)which are nanofragments of graphene with an average size between 2 and 50 nm have attracted much attention due to their outstanding properties such as high conductivity,high surface area,and good solubility in various *** combine the quantum confinement and edges effects and the properties of ***,GQDs offers a broad range of applications in various fields(medicine,energy conversion,and energy storage devices).This review will present the recent research based on the introduction of GQDs in batteries,supercapacitors,and microsupercapacitors as electrodes materials or mixed with an active material as an auxiliary ***,discussed on selected examples,summarize the electrochemical performances and finally,challenges and perspectives are recalled for the subsequent optimization strategy of electrode *** review is expected to appeal a broad interest on functional GQDs materials and promote the further development of high-performance energy storage device.

关键词： energy storage graphene quantum dots lithium ion batteries sodium ion batteries supercapacitor

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Solar-driven H_(2)O_(2)production by S-scheme heterojunction photocatalyst

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Chinese Journal of Catalysis 2025年第5期72卷 24-47页

作者： Han Li Wang Wang Kaiqiang Xu Bei Cheng Jingsan Xu Shaowen Cao School of Automotive Materials Hubei University of Automotive TechnologyShiyan 442020HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Technology Innovation Center for Advanced Composites Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry and Physics&Centre for Materials Science Queensland University of TechnologyBrisbaneQueensland 4001Australia

Hydrogen peroxide(H_(2)O_(2)),as an essential and green chemical,is extensively used in energy and environmental ***,the production of H_(2)O_(2)primarily relies on the anthraquinone method,which is an energy-intensive method involving multi-step reactions,producing harmful by-product ***-driven H_(2)O_(2)production,an alternative route for H_(2)O_(2)generation,is a green and sustainable technology since it only utilizes water and oxygen as ***,the rapid recombination of charge carriers as well as insufficient redox capability limit the photocatalytic H_(2)O_(2)production *** step-scheme(S-scheme)heterojunction photocatalysts has been regarded as an effective strategy to address these drawbacks because it not only achieves spatially separated charge carriers,but also preserves redox capability of the photocatalytic *** paper covers the recent advances of S-scheme heterojunction photocatalysts for H_(2)O_(2)production in terms of basic principles,characterization techniques,and preparation ***,the mechanism and advantages of S-scheme heterojunction for photocatalytic H_(2)O_(2)generation are systematically *** recent S-scheme heterojunction designs,including inorganic-organic heterojunction,inorganic-inorganic heterojunction,and organic-organic heterojunction,are ***,the challenges and research directions of S-scheme photocatalysts for H_(2)O_(2)generation are presented.

关键词： Step-scheme heterojunction H_(2)O_(2)photosynthesis Charge migration mechanism Solar conversion

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Influences of particle size and composition on the hydrolysis behavior of MgO·nAl2O3 spinel

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Ceramics International 2025年

作者： Cao, Mengying Tu, Guangsheng Huang, Qing Liao, Jiaxing Jing, Zhengyang Chen, Bowen Tu, Bingtian Wang, Hao Wang, Weimin Fu, Zhengyi State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Hubei Xiangyang441000 China

The hydrolysis characteristic of MgO·nAl2O3 powders poses significant challenges for fabricating large-sized and complex-shaped transparent ceramic components. In this work, the hydrolysis behavior of MgO·nAl2O3 powders with designed particle size and chemical composition was systematically investigated. The results ascertained that coarse MgAl2O4 powders synthesized at higher temperatures exhibited reduced surface-active sites, and alumina-rich spinel surfaces exposed decreased unsaturated Mg atoms that catalyze water dissociation. The OH− concentrations in MgAl2O4-coarse and MgO·1.8Al2O3 suspensions were 63 % and 32 % of that in MgAl2O4-fine one, respectively, indicating an effective inhibition of the hydrolysis reaction. Ultimately, the hydrolysis mechanism of MgO·nAl2O3 was elucidated, where the boehmite protective layer (∼15 nm) formed on the particle surface after hydrolysis. This study provides a fundamental understanding of the surface properties and hydrolysis behavior of MgO·nAl2O3, which is of great significance for the preparation of spinel transparent ceramics using aqueous gel-casting. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Surface reactions

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Integrating thin wall into block:A new scanning strategy for laser powder bed fusion of dense tungsten

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Journal of materials Science & technology 2022年第25期120卷 167-171页

作者： Zhengang Xiong Ji Zou Zhaoyang Deng Jinhan Chen Wei Liu Yuchi Fan Minshi Wang Xiaoqing Zhao Chunfeng Yu Dongdong Dong Wenyou Ma Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Institute of Functional Materials Donghua University201620China School of Metallurgy and Materials University of BirminghamBeijing 100084China

Due to a combination of outstanding properties including high melting point,high density,low thermal expansion coefficient,low saturated vapor pressure and excellent thermal conductivity,tungsten(W)parts have been widely used as electrodes,heating elements,anti-scatter grids for Computed Tomography(CT)equipment,rocket nozzles and divertor materials for nuclear fusion[1].

关键词： powder thermal saturated

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CO_(2) adsorption and activation on p-block catalyst Ga_(2)O_(3)

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Science China materials 2025年第2期68卷 590-596页

作者： Zhizhuang Liu Xiaoxu Kuang Baowen Li Chenghua Sun Rong Tu Song Zhang Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Chemistry and Biotechnology Swinburne University of TechnologyHawthornVictoria 3122Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The fixation and conversion of CO_(2)frommedium-and high-temperature industrial exhaust gases arescientifically important and challenging tasks owing to theharsh conditions ***_(2)O_(3),a stable p-block compound,is surprisingly active in the thermal conversion of hot CO_(2)waste gas,but its underlying mechanism remains *** study,we investigated CO_(2)adsorption and activationacross 11 different Ga_(2)O_(3)-terminated faces using densityfunctional *** transfer and chemical bond analysesrevealed the occurrence of two distinct activation mechanismsinvolving synchronous electron gain and loss,driven by astrong synergetic effect between Ga cations and O anions onthe substrate *** Ga-O synergy enhances the CO_(2)activation efficiency compared with single active sites,with CO_(2)^(δ+) cation more readily capturing H atom than CO_(2)^(δ–).Tothe best of our knowledge,such a dual activation mechanismhas not been reported before,particularly for p-block *** findings provide new insights into the direct catalyticconversion of CO_(2)emissions and offer strategies for the rational design of industrial-grade catalysts for medium-andhigh-temperature CO_(2)tail gas conversion.

关键词： p-block catalyst gallium oxide carbon dioxide density functional theory synergetic mechanism

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Microstructure evolution during hydrogen pre-sintering of (Tb0.7Lu0.3)2O3 transparent ceramics 17

Microstructure evolution during hydrogen pre-sintering of (T...

引用

17th National Conference on Laser technology and Optoelectronics

作者： Xin, Yu Xu, Tao Wang, Yaozhi Luo, Peng Zhao, Wenhai Kang, Bin Jing, Wei Mei, Bingchu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang621900 China

ISBN: (纸本)9781510661097

(Tb0.7Lu0.3)2O3 transparent ceramics were prepared by hydrogen pre-sintering and hot isostatic pressing treatment. ZrO2 was added as sintering aid to restrain the abnormal grain growth. The microstructure evolution and linear shrinkage changes of the (Tb0.7Lu0.3)2O3 transparent ceramics in the range of 1400℃~1700℃ were investigated. It can be seen from the results that the linear shrinkage of ceramics increased nonlinearly with the increase of the sintering temperature. In the range of 1550℃~1600℃, the (Tb0.7Lu0.3)2O3 ceramics had a higher shrinkage rate. And the shrinkage rate slowed down when the temperature exceeded 1600℃. The samples prepared by 1550℃ hydrogen pre-sintering combined with 1550℃ hot isostatic pressing sintering showed good optical property. The average grain size was about 1.69μm and the highest transmittance reached 74.81% @1064 nm. © 2022 SPIE.

关键词： Hydrogen

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BaTiO_(3)/Polyurethane Dielectric Composites with Diels-Alder Bond for Improved Self-Healing Properties

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Journal of Renewable materials 2022年第9期10卷 2355-2364页

作者： unlong Yao Wei Nie Zhengguang Sun Huan Yang Yu Guan Lin Gao Xueliang Jiang Mujie Guo Chuanxi Xiong Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan430205China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062China Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of TechnologyWuhan430205China School of Chemistry and Environmental Engineering Jianghan UniversityWuhan430056China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China

In general,self-healing dielectric composites are mainly composed of polar hydrogen bonds,which have high hydrophilicity and are unsuitable for humid *** composite with Diels-Alder(D-A)bond contains covalent bonds,it can be adopted as an efficient self-healing ***,we construct self-healing barium titanate(BT)/polyurethane(PU)dielectric composites by adopting PU with D-A bond as matrix(BT/PU-DA).The prepared 10%BT/PU-DA composite exhibits superior self-healing ability than that of ***,its dielectric constant can reach 9.3 with a loss of only 0.04 at 1000 Hz and maintain 93%repair efficiency of tensile *** experimental analysis suggests the introduction of D-A bond can enhance the thermostability and self-healing ability of BT/PU-DA *** addition,the incorporation of BT nanoparticles and D-A bond in the self-healing composite contributes to the lower dielectric loss and excellent tensile strength after *** adopted strategy is a promising and facile approach to develop highly efficient selfhealing dielectric material,which will be conducive to reuse and sustainable development of the electronic packaging material in aqueous medium or wet environment.

关键词： Diels-Alder bond self-healing dielectric properties tensile strength polyurethane

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Deep-learning enabled atomic insights into the phase transitions and nanodomain topology of lead-free(K,Na)NbO_(3) ferroelectrics

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Science China materials 2024年第9期67卷 3029-3038页

作者： Xu Zhang Bei Li Ji Zou Hanxing Liu Ben Xu Kai Liu School of Materials Science and Engineering Research Center for Materials Genome EngineeringWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Graduate School China Academy of Engineering PhysicsBeijing100193China

Lead-free K_(x)Na_(1-x)NbO_(3)(KNN)perovskites have garnered increasing attention due to their exceptional ferropiezoelectric properties,which are effectively tuned via polymorphic structures and domain ***,atomic insights into the underlying nanomechanisms governing the ferroelectricity of KNNs amidst varying factors such as composition,phase,and domain are still ***,we perform molecular dynamics simulations of phase transitions and domain dynamics for KNNs with various K/Na ratios(x=0.25∼1.0)by using ab-initio accuracy deep learning potential(DP).As a demonstration of its transferability,the newly developed DP model shows quantum accuracy in terms of the equation of states,elastic constants,and phonon dispersion relations for various KNbO_(3)and K_(0.5)Na_(0.5)NbO_(3).Furthermore,intricate temperature-dependent phase transitions and domain formation of KNNs are extensively and quantitatively *** indicate that for KNNs with compositions x ranging from 0.25 to 1.0,the paraelectric-to-ferroelectric phase transition of KNNs is driven primarily by the order-disorder effect,while the displacive effect is dominant in the subsequent ferroelectric phase ***,flux-closure or herringbone-like nanodomain patterns arranged with 90°domain walls formed close to the experimental *** analyses reveal that favorable 90°domain wall formation becomes more challenging with increasing Na content due to distinct oxygen octahedron distortion arising from the different ionic radii of K/Na *** is envisioned that the combination of unified DP and atomistic simulations will help offer a robust solution for more accurate and efficient in silico explorations of complex structural,thermodynamic,and ferroelectric properties for relevant energy storage and conversion materials.

关键词： KNN molecular dynamics deep potential phase transitions domain dynamics

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