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Journal of Materials Science & Technology 2024年第11期178卷 179-187页

作者： Jianqiang Wang Weijie Li Xinya Zhang School of Chemistry and chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologySouth China University of TechnologyGuangzhou 510640China

Graphene-based phase change composites hold significant potential for solar energy utilization,but their poor thermal conductivity hinders their practical *** this work,an air-dried graphene skele-ton(AGS)with excellent thermal conductivity enhancement efficiency was constructed by the ice tem-plating method and syneresis,and the air-dried graphene phase change composite(AGP)was subse-quently obtained through vacuum-impregnating n-Docosane(C22)into *** syneresis effectively re-duced the phonon scattering between graphene sheets within AGS and increased the density of AGS to 0.1701 g/***,with a graphene skeleton loading of 23.82 wt.%,AGP exhibited excellent thermal conductivity of 9.867 W/(m K),outstanding electrical conductivity of 68.08 S/cm,and remarkable shape ***,AGP demonstrated a melting enthalpy of 188.5 J/g and an outstanding solar-thermal conversion efficiency of 93.98%,showing enormous potential for the utilization of solar energy.

关键词： Syneresis Graphene skeletons Thermal conductivities Phase change composites Solar-thermal conversion

Controllable surface reconstruction of copper foam for electrooxidation of benzyl alcohol integrated with pure hydrogen production

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SmartMat 2024年第1期5卷 147-157页

作者： Yingnan Han Chang Yu Hongling Huang Qianbing Wei Junting Dong Lin Chen Jieshan Qiu State Key lab of Fine chemicals School of Chemical EngineeringLiaoning Key Lab for Energy Materials and Chemical EngineeringDalian University of TechnologyDalianChina State Key laboratory of chemical Resource Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijingChina

Electrocatalytic water splitting that is coupled with electrocatalytic chemical oxidation is considered as one of the promising methods for efficiently obtaining hydrogen energy and fine ***,we focus on an electrochemical redox activation strategy to rationally manipulate the microstructure and surface valence states of copper foam(CF)and boost the corresponding performance towards electrocatalytic benzyl alcohol oxidation(EBA),accompanied by the efficient hydrogen ***,the Cu(II)‐dominated species are gradually formed on the CF surface with the dissolution and redeposition of copper in the suitable potential *** new species containing Cu2O,CuO,and Cu(OH)2 during surface reconstruction process of the CF were confirmed by multiple characterization *** 220‐cycled activation(CF‐220),the activated CF achieves an increase of current density for EBA in anode from 9.5 for the original CF to 29.3 mmol/cm2,while the pure hydrogen yield increases threefold than that of the original CF at 1.5 *** produced new species can endow the CF‐220 with abundant acidity sites,which can enhance the adsorption toward Lewis‐basicity benzyl alcohol,confirmed by NH3‐temperature‐programmed *** situ Raman result further reveals that the as‐produced CuO,Cu(OH)2,and Cu(OH)42−are the main active species toward the EBA process.

关键词： benzyl alcohol copper electrochemical oxidation Lewis acid surface reconstruction

A new perspective on hydrogenation of CO2 into methanol over heterogeneous catalysts

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Progress in Natural Science:Materials International 2024年第3期34卷 482-494页

作者： Xueyuan Pan Jingcheng Xu Yali Wang Mingzhe Ma Haiquan Liao Hao Sun Mengmeng Fan Kui Wang Kang Sun Jianchun Jiang Key lab.of Biomass Energy and Material Jiangsu Province Key and Open Lab.of Forest Chemical Engineering SFA National Engineering Lab.for Biomass Chemical Utilization Institute of Chemical Industry of Forest Products Chinese Academy of Forestry Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry University

The utilization of carbon dioxide is critical to realize the objective of "carbon peak and neutrality". Among various carbon dioxide exploitation approaches, catalytic hydrogenation of carbon dioxide is a significant method to selectively convert the CO2into methanol and other valuable chemicals. Among these products, methanol is a crucial chemical feedstock that can be utilized as a platform molecule for the synthesis of chemicals and fuels as well as a fuel for internal combustion engines and fuel cells, causing particular interest. Nowadays, Catalytic hydrogenation of carbon dioxide into methanol has shifted its focus on the creation of low-cost, environmentally friendly, and efficient catalysts. Inspired of this, we have concluded the mechanism of catalytic hydrogenation of carbon dioxide, and reviewed the research progress of multiple heterogeneous catalysts with high catalytic application prospect, especially the supported catalysts.

关键词： Carbon dioxide Heterogeneous catalyst Hydrogenation Methanol

Effect of hydroxyl groups on hydrophilic and photocatalytic activities of rare earth doped titanium dioxide thin films

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Journal of Rare Earths 2015年第2期33卷 148-153页

作者：杜军吴其钟汕顾馨刘娇郭海志张文龙彭海龙邹建国 Key lab of Poyang Lake Ecology and Bio-resource Utilization (Ministry of Education) Department of Chemical Engineering College of Environmental and Chemical Engineering Nanchang University

Rare earth（Y, La and Nd） doped TiO2 thin films were prepared on glass slides by sol-gel method. The photocatalytic decomposition of methylene blue in aqueous solution was used as a probe reaction to evaluate their photocatalytic activities. The effects of hydroxyl groups on hydrophilic and photocatalytic activities were investigated by means of techniques such as X-ray diffraction（XRD）, atomic force microscopy（AFM）, Fourier transform infrared（FTIR）, optical contact angle, UV-Visible spectroscopy and VIS spectroscopy. The results showed that an appropriate doping of rare earth could cause the TiO2 lattice distortion, inhibited phase transition from anatase to rutile, accelerated surface hydroxylation and produced more hydroxyl groups, which resulted in a denser surface and smaller grains（40–60 nm）, and a significant improvement in the hydrophilicity and photoreactivity of TiO2 thin films. The optimal content of rare earth was between 0.1 wt.% and 0.3 wt.%. Moreover, the modification mechanism of rare earth doping was also discussed.

关键词： TiO2 rare earth hydroxyl groups hydrophilicity photocatalytic activity

Theoretical design and preparation of high thermal-stable jet fuel

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Science China Chemistry 2008年第2期51卷 138-144页

作者： LIU GuoZhu QU HaiJie SHEN HuiMing ZHANG XiangWen MI ZhenTao Key lab of Green chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

A high thermal-stable jet fuel design method was developed using composition-properties relations and basic specification properties of jet fuel. Tannery diagrams were provided to visualize relationships among three main components (n-paraffins, iso-paraffins, cycloparaffins, or aromatics) with four major specification properties (density, flash point, freezing point, net heat of combustion) and thermal sta- bility. An optimum chemical composition was established to meet performance requirements: n-paraffins 25%-45%, iso-paraffins 15%-30%, cycloparaffins 30%-50%, and aromatics 5%. The thermal stability test on four fuel samples with and without optimal composition indicated that the thermal stabilities of fuel samples with optimal composition are higher than RP-3 jet fuel, and that the theoretical design method is a reliable method to screen the basic oil for the high thermal-stable jet fuel.

关键词： jet fuel thermal stability composition-property relations composition design

Enhanced methanation stability of nano-sized MoS2 catalysts by adding Al2O3

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Frontiers of chemical Science and Engineering 2015年第1期9卷 33-39页

作者： Zhenhua LI Jia HE Haiyang WANG Baowei WANG Xinbin MA Key lab for Green chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A series of unsupported MoS2 catalysts with or without Al2O3 modification was prepared using a modified thermal decomposition approach. The catalysts were tested for the methanation of carbon monoxide and the optimum one has 25.6wt-% Al2O3 content. The catalysts were characterized by nitrogen adsorption measurement, X-ray diffraction and transmission electron microscopy. The results show that adding appropriate amount of Al2O3 increases the dispersion of MoS2, and the increased interaction force between MoS2 and Al2O3 can inhibit the sintering of active MoS2 to some extent.

关键词： unsupported catalyst molybdenum sulfide,stability alumina methanation

Synthesis of 2,2-Bis-C-functionalized Chain Glucosid-3-ketals

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Chinese Journal of Chemistry 2012年第1期30卷 195-198页

作者：张福义刘虹盛英明刘宏民 Chemistry Department The Key Lab of Chemical Biology and Organic Chemistry of Henan ProvinceZhengzhou UniversityZhengzhouHenan 450052China School of Pharmaceutical Sciences Zhengzhou UniversityZhengzhouHenan 450001China

Novel 2,2-bis-C-functionalized chain glucosid-3-uloses have been synthesized in the form of ketal. The synthesis is rather convenient through one pot multistep reactions and no expensive reagents are involved. The products are formed via autoxidation-Michael addition mechanism and their structures were characterized by X-ray crystallographic analysis. Their crystal stuctures are stablilized by intermolecular hydrogen bonds and double-strand supramolecular stacking is observed.

关键词： 2,2-bis-C-functionalized chain glucosid-3-ketal double-strand supramolecular stacking synthesis de-sign crystal structure autoxidation

Recent developments in microfluidic device-based preparation, functionalization, and manipulation of nano- and micro-materials

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Particuology 2019年第4期17卷 1-19页

作者： Guangsheng Luo Le Du Yujun Wang Kai Wang The State Key lab of chemical Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 China The State Key laboratory of chemical Resource Engineering Beijing Key Laboratory of Membrane Science and Technology Beijing University of Chemical Technology Beijing 100029 China

Microfluidic systems provide a powerful platform for preparing,functionalizing,and manipulating nano-/*** this review,we summarize the characteristics of state-of-the-art microfluidic techniques and their application to processing novel nano-/micro-materials with tunable size,shape,morphology,composition,and properties.A variety of synthesis strategies based on novel microfiuidic devices are presented and compared,including their integration with real-time monitoring,external fields,and automatic feedback *** functional nano-/micro-materials with complex structures have been controllably prepared and post-processed to obtain high-quality *** for controlling and tuning physical and chemical properties are also examined in terms of the design and function of microfluidic *** provide an outlook on future developments in the processing of nano-/micro-materials by microfluidic technologies.

关键词： Microfluidics Microchemical systems Nanomaterials Micro-materials Scale-up

Ta_(3)N_(5)–LaTaON_(2) heterojunction with matched interfaces to accelerate charge separation for efficient photocatalytic water oxidation

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Journal of Materials Science & Technology 2023年第23期154卷 241-250页

作者： Guoan Lin Chi Zhang Xiaoxiang Xu Clinical and Central lab Putuo People's Hospital Tongji University Shanghai 200060 China Shanghai Key lab of chemical Assessment and Sustainability School of Chemical Science and Engineering Tongji University Shanghai 200092 China

Charge separation is generally considered as the most critical step to achieve efficient photocatalytic reactions. Although charge separation can be promoted by a semiconductor heterojunction, its efficacy is inherently restrained by the mismatched atomic arrangements across the heterojunction interfaces. Here, Ta3N5–LaTaON2 heterojunction with matched interfaces has been fabricated by one-step ammonolysis treatment of KLaTa2O7. The match interfaces are formed by nearly perfect adhesion of Ta3N5 (010) and LaTaON2 (101¯) facets whose interatomic distance is similar. Compared with conventional heterojunction, the so-formed Ta3N5–LaTaON2 heterojunction are extremely efficient in accelerating charge separation which in turn enables a high photocatalytic activity. An apparent quantum efficiency as high as 11.6% at 420 ± 20 nm has been reached by Ta_(3)N_(5)–LaTaON_(2) heterojunction, which is almost three times higher than Ta_(3)N_(5)-LaTaON_(2) mixtures. These results signify the importance of matched heterojunction interfaces for charge separation and provide a paradigm in the design of efficient heterojunction-based semiconductor photocatalysts.

关键词： Semiconductor heterojunction LaTaON_(2) Ta_(3)N_(5) Photocatalyst Water oxidation

A general strategy via photoelectrocatalytic oxygen reduction for generating singlet oxygen with carbon bridged carbon-nitride electrode

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Chinese chemical Letters 2021年第11期32卷 3393-3397页

作者： Qianqian Yang Zhiyuan Feng Mingyue Liu Jinxing Zhang Hongying Zhao Guohua Zhao School of chemical Science and Engineering and Shanghai Key Lab of Chemical Assessment and SustainabilityTongji UniversityShanghai 200092China

With the ever-growing demand of clean water for the healthy world,water purification has become an urgent global *** oxygen(^(1)O_(2))as unique non-radical derivative of oxygen,possessing unoccupiedπ*orbital and exhibiting high selectivity towards electron-rich organic ***,most of the approaches suffer from low-efficiency or biotoxicity,which severely restrict their potential ***,in this work,we propose a general strategy via photoelectrocatalytic for selectively reducing oxygen to^(1)O_(2)with designed carbon bridged carbon nitride(CBCN).This work highlights the important role of synergistic photo-electro-catalytic effect for selectively generating the^(1)O_(2)via oxygen reduction pathway,which can be a promising way especially for degrading electron-rich pollutants.

关键词： Oxygen reduction reaction Singlet oxygen Photoelectrocatalytic process Carbon-nitride Wastewater treatment