检索结果-内蒙古大学图书馆

Synthesis of interfacial electric field-enhanced CdS/CdxZn1-xS/ZnO ternary heterojunction by lye dissolution etching mechanism for photocatalytic H2 production and CO2 reduction

引用

材料科学技术（英文版） 2025年第1期204卷 152-165页

作者： Qi Li Shengchao Yang Yufan Huang Yuwei Liang Chunling Hu Min Wang Zhiyong Liu Yanlong Tai Jichang Liu Yongsheng Li School of Chemistry and Chemical Engineering Shihezi University/Key Laboratory of Green Process for Chemical Engineering/Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region/Engineering Center for Chemical Materials of Xinjiang BingtuanShihezi UniversityShihezi 832003China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China School of Chemistry and Chemical Engineering Shihezi University/Key Laboratory of Green Process for Chemical Engineering/Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region/Engineering Center for Chemical Materials of Xinjiang BingtuanShihezi UniversityShihezi 832003China Key Laboratory of Human-Machine Intelligence-Synergy Systems of Chinese Academy of Sciences(CAS) Shenzhen Institutes of Advanced TechnologyShenzhen 518055China School of Chemistry and Chemical Engineering Shihezi University/Key Laboratory of Green Process for Chemical Engineering/Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region/Engineering Center for Chemical Materials of Xinjiang BingtuanShihezi UniversityShihezi 832003China Lab of Low-Dimensional Materials Chemistry Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology ShanghaiShanghai 200237China

The difficulty in fabricating a multifaceted composite heterojunction system based on CdxZn1-xS limits the enhancement of photocatalytic *** the present scrutiny,novel ZnO/CdxZn1-xS/CdS com-posite heterojunctions are successfully prepared by the alkaline dissolution etching *** internal electric field at the interface of Ⅰ-type and Z-scheme heterojunction improved the effective charge *** ZC 8 sample exhibits excellent photocatalytic performance and the H2 production efficiency is 15.67 mmol g-1 h-1 with good stability up to 82.9％in 24-hour *** performance of CH4 and CO capacity in the CO2RR process is 3.47 μmol g-1 h-1 and 23.5 μmol g-1 h-1,*** photogener-ated accelerated charge transport is then examined in detail by in situ X-ray photoelectron spectroscopy(ISXPS)and density functional theory(DFT)*** work presents a new idea for the synthe-sis of CdxZni-xS solid-solution-based materials and provides a solid reference for the detailed mechanism regarding the electric field at the heterojunction interface.

关键词： Photocatalysis Interface electric field Composite heterostructure Photocatalytic mechanism CdxZn1-xS solid-solution

来源：评论

学校读者我要写书评

暂无评论

Shell engineering on mesoporous metal organic frameworks: Beyond microporous restriction in core-shell architecture

引用

green Chemical engineering 2025年

作者： Shi, Lijuan Sun, Deyun Xu, Hongxue Maqsood, Zunaira Chen, Shangqing Yi, Qun Key Laboratory of Green Chemical Engineering Process of Ministry of Education Hubei Key Lab of Novel Reactor & Green Chemical Technology School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan430205 China

Core-shell metal organic frameworks (MOFs) have emerged as a promising platform for efficient separation and sensing, benefiting from the sieving effect of the shell and the large storage capacity of the core. However, conventional core-shell MOFs often encounter challenges with compromised pore integrity, which predominantly restricts their design to microporous cores. In this study, a straightforward strategy to construct functional shells on mesoporous MOFs is proposed. By leveraging dynamic imine chemistry, small-molecule amines are assembled into supramolecular polymers and anchored onto the surface of mesoporous MOFs through metal coordination. This approach preserves the mesoporous structure of the core while introducing hydrogen-bonding channels in the shell, facilitating the selective capture and storage of polar gases. The resulting core-shell MOF demonstrates exceptional CO2/N2 selectivity of up to 10,943 and a high CO2 adsorption capacity, enabling the direct production of high-purity CO2 (99.7 vol.%) from humid flue gas in a single breakthrough experiment. Furthermore, this strategy exhibits excellent stability and versatility across various mesoporous MOFs, underscoring its potential for practical industrial gas separation applications. © 2025 Institute of process engineering, Chinese Academy of Sciences.

关键词： Hydrogen bonds

来源：评论

学校读者我要写书评

暂无评论

CuNi alloy nanoparticles supported on TiO 2 nanofiber for efficient photocatalytic H 2 evolution from aqueous ammonia

引用

Journal of Materials Science & Technology 2025年 238卷 294-302页

作者： Rui Ren Heng Yang Bingquan Xia Yang Xia Jun Zhang Qun Yi Key Laboratory of Green Chemical Engineering Process of Ministry of Education Hubei Key Lab of Novel Reactor and Green Chemical Technology School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan 430072 China College of Chemistry and Environmental Engineering Wuhan Polytechnic University Wuhan 430023 China School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430072 China

Photocatalytic H 2 production from an aqueous NH 3 solution is an emerging and potential way to purify wastewater and obtain green energy. However, the H 2 production rate by semiconductors is largely limited by the fast recombination of photogenerated charges and the weak H + adsorption ability. Herein, non-noble bimetallic CuNi cocatalyst was deposited on the surface of TiO 2 nanofiber to prepare CuNi/TiO 2 composites via simple hydrothermal procedure followed by calcination treatment. The obtained CuNi/TiO 2 composites not only improve the absorption and utilization abilities of incident light, but also offer plentiful active sites and inhibit the recombination of charges. As a result, the photocatalytic efficiency of H 2 production is much higher than that of pure TiO 2 in low concentration ammonia solution. Particularly, the Cu 2 Ni 1 /TiO 2 sample exhibits the maximum H 2 production rate (285.4 μmol h −1 g −1 ), which was 4.0, 2.1 and 6.7 times higher than that of Cu/TiO 2 , Ni/TiO 2 and pure TiO 2 nanofiber, respectively. This yield also outperforms Pt/TiO 2 in terms of its performance. Meanwhile, the oxidation product of hydrazine hydrate is detected. Furthermore, density-functional-theory (DFT) calculations reveal that the synergistic effect of bimetallic CuNi alloy benefits to H* sorption and promotes H 2 desorption, thus resulting in the improvement of H 2 production. This work provides new insight into the fabrication of non-noble metal alloys as efficient cocatalysts for photocatalysis.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Catalytic Asymmetric Total Synthesis of (+)-Chamaecydin and (+)-Isochamaecydin and their Stereoisomers

引用

Angewandte Chemie - International Edition 2025年第13期64卷 e202423944页

作者： Zhang, Yuan-He Deng, Le-Hua Tan, Dong-Xing Han, Fu-She Jilin Province Key Lab of Green Chemistry and Process Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Jilin Changchun130022 China School of Applied Chemistry and Engineering University of Science and Technology of China Anhui Hefei230026 China

A modular approach was developed for the first catalytic asymmetric total syntheses of naturally occurring C30 terpene quinone methides and their non-natural stereoisomers, which feature the presence of an unprecedented spiro[4.4]nonane-containing 6–6–6-5–5–3 hexacyclic skeleton. Resting on a chiral phosphinamide-catalyzed enantioselective reduction of 2,2-disubstituted cyclohexane-1,3-dione, a concise route for the synthesis of enantioenriched 6–6 bicyclic fragment was developed. The 6–6 ring fragment and the five-membered ring fragment were unified via a metal-halogen exchange/intermolecular addition reaction. Subsequently, the central 6–5 bicyclic ring system was constructed through a Michael/aldol cascade. The successful establishment of these strategic transformations allowed for an efficient and rapid construction of spiroannulated 6–6–6–5–5 pentacarbocyclic core via a convergent manner. Finally, the total syntheses of naturally occurring (+)-chamaecydin and (+)-isochamaecydin and their corresponding 1’,5’-stereoisomers have been achieved divergently by appropriately orchestrating the reaction sequence including isopropyl incorporation, oxidation state adjustment, and carbonyl group-directed regio- and stereoselective cyclopropanation at a late stage. © 2025 Wiley-VCH GmbH.

关键词： Stereocenters

来源：评论

学校读者我要写书评

暂无评论

Experimental study and molecular dynamics simulation:Thermal behaviors, volatile products and chlorine migration characteristics during pyrolysis and combustion of 2,4-dichlorophenoxyacetic acid waste salt

引用

Journal of Environmental Management 2025年 382卷 125277页

作者： Song, Yueyan Gu, Xiangyu He, Di Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological Engineering Guangdong University of Technology Guangzhou510006 China Chinese Academy of Science Institute of Process Engineering State Key Lab Multiphase Complex Systems Beijing100190 China

An organochlorine pesticide, 2,4-Dichlorophenoxyacetic acid (24D), produces pesticide by-product waste salts that pose a potential risk of secondary contamination, creating significant challenges in disposal management. While thermal treatment has emerged as a viable method for managing 24D waste salt, reducing the thermal temperature and controlling the release of chlorine-containing organic compounds from volatile products remains a significant obstacle. In this work, the effects of pyrolysis and combustion on the 24D thermal treatment were explored by TGA-FTIR-GCMS coupling techniques and molecular dynamics calculations (ReaxFF). Combustion achieved a total organic carbon (TOC) removal rate of 93.17 % at 873K, which was higher than that achieved by pyrolysis. In terms of volatile products, the release of small molecule gases such as CO2, CO, CH4, and HCl is significantly enhanced during combustion, the HCl emission in the combustion process is 2.7 times that in the pyrolysis process. However, as the temperature of the combustion process increased, 24D synthesis reaction to form substances such as heterocyclic-Cl, the amount of which increased to 7.01 % at 873K. ReaxFF-MD simulations investigated the thermal treatment of 24D, revealing a complex pyrolysis and combustion mechanism, including multiple reaction pathways for dechlorination, dehydrogenation, dehydroxylation, and generation of chlorinated products HCl and CH3Cl. The combustion process can increase the free radicals and provide more degradation pathways in the reaction system, which promotes the migratory conversion of organic-Cl to inorganic-Cl in 24D. Therefore, combustion treatment with low decomposition temperature and easy degradation of chlorine-containing intermediate products is a feasible method to purify 24D WS. © 2025 Elsevier Ltd

关键词： Dechlorination

来源：评论

学校读者我要写书评

暂无评论

Hierarchical hollow silicalite encapsulated Cu-Fe oxides for selectively oxidative depolymerization of lignin to diethyl meleate

引用

Journal of Catalysis 2025年 448卷

作者： Li, Lixia Kong, Juanhua Long, Jinxing Cai, Zhengping Zeng, Qiang Wu, Kejia Zhan, Yingying Liu, Sijie He, Hongyan Li, Xuehui School of Chemistry and Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product Technology South China University of Technology Guangdong Guangzhou510640 China College of Chemical Engineering Fuzhou University Fujian Fuzhou350002 China Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemistry and Chemical Engineering Henan Normal University Henan Xinxiang453007 China

Heterogeneously catalytic depolymerization of lignin into value-added biochemicals are imperative, yet challengeable by the limited mass transport of lignin and the non-ideal spatial distributions of active sites in catalysts. Herein, a series of polycrystalline materials with Cu and Fe oxides encapsulated in hierarchical hollow nano silicalite (Cux-Fey@HhNS) were designed for step-by-step oxidative conversion of lignin into diethyl meleate (DEM). 92.0 % conversion of lignin with an exceptional DEM yield of 31.2 wt% and selectivity of 70.7 % was achieved at 150 °C for 24 h using Cu2.5-Fe2.2@HhNS. A series of controlled experiments and characterization showed clearly that the superior performance in DEM production was attributed to the enhanced tandem processes of lignin Cα-Cβ bonds deconstruction by framework Cu2+, subsequently aromatic ring-cleavage by the isolated framework Fe3+, and the well-balanced micro-/mesoporosity ratio of Cux-Fey@HhNS facilitates the diffusion of lignin macromolecules/products, contributing to the excellent DEM yield and selectivity as well. Further mechanistic investigation illustrated that the process proceeds via a single electron transfer pathway. Consequently, this work provides new insights into lignin valorization to bulk chemicals, paving the way for biomass-derived recyclable polymeric materials as sustainable alternative to traditional petroleum-based routes. © 2025 Elsevier Inc.

关键词： Polycrystalline materials

来源：评论

学校读者我要写书评

暂无评论

Facile synthesis of perfect ZnSn（OH）6 octahedral microcrystallines with controlled size and high sensing performance towards ethanol

引用

Frontiers of Materials Science 2018年第2期12卷 176-183页

作者： Shaoming SHU Chao WANG Shantang LIU School of Chemistry and Environmental Engineering Key Laboratory for Green Chemical Process (Ministry of Education) Hubei Key Lab of Novel Reactor & Green Chemical Technology Wuhan Institute of Technology Wuhan 430073 China

Uniform and monodisperse ZnSn（OH）6 perfect octahedrons have been synthesized by a facile coprecipitation reaction process. The particle size of the asprepared ZnSn（OH）6 octahedral structure can be readily controlled by adjusting the reaction temperature （T）, and the side length of ZnSn（OH）6 octahedrons was tailored from 3 pm （40℃） to 4 pm （60℃） and 5 μm （80℃）. The ethanol sensing properties of ZnSn（OH）6 octahedrons were carefully investigated. The gas sensing experimental data show that the sensor based on ZnSn（OH）6 （40℃） has good selectivity, fast response/recovery time and the highest response （Ra/Rg = 23.8） to 200 ppm ethanol at relatively low optimum operating temperature （200℃） compared to sensors based on ZnSn（OH）6 （60℃） and ZnSn（OH）6 （80℃）, which might result from different specific surface areas. The study demonstrated that perfect octahedral ZnSn（OH）6 with controlled crystalline size and desirable sensing performance can be synthesized by a simple fabrication procedure, and the octahedral ZnSn（OH）6 could be a highly promising material for high-performance sensors.

关键词： ZnSn(OH)6 octahedron gas sensor ethanol

来源：评论

学校读者我要写书评

暂无评论

Pr-doped ln203 nanocubes induce oxygen vacancies for enhancing triethylamine gas-sensing performance

引用

Frontiers of Materials Science 2019年第2期13卷 174-185页

作者： Chao WANG Wu WANG Ke HE Shantang LIU School of Chemistry and Environmental Engineering Key Laboratory for Green Chemical Process (Ministry of Education) Hubei Key Lab of Novel Reactor & Green Chemical Technology Wuhan Institute of Technology Wuhan 430073 China

Nanocubes derived from pure In2O3 and xPr-In2O3 (x= 1, 2, 3 and 5 mol.%) were synthesized using a facile hydrothermal method, followed by calcination. The morphological and structural characterization demonstrated that as-synthesized samples presented regular cubes that decreased in size with the increase of the Pr doping. The data showed that the sensing performances of sensors based on In203 were notably improved after the Pr doping. Among them, the sensor based on 2 mol.% Pr-In2O3 had the best sensing performance towards the triethylamine (TEA) gas, including a high response (RaIRg = 260 to 100 ppm TEA gas, which is about 12 times higher than that of the sensor based on pure In2O3), a short response time (2s), and a low detection limit (0.2 ppm) at 350℃. The mechanism responsible for the enhancement of sensing performance was attributed to the improvement of the vacancy content of 2 mol.% Pr-ln203, which promoted the oxidation—reduction reaction with the TEA gas that occurred on the materials surface.

关键词： gas sensor Pr-dope In2O3 triethylamine oxygen vacancy

来源：评论

学校读者我要写书评

暂无评论

PARTIAL CARBAMOYLATION OF CELLULOSE MICROSPHERES: A NEW METHOD TO PREPARE ADSORBENTS FOR LIQUID CHROMATOGRAPHY

引用

Chinese Journal of Polymer Science 2013年第12期31卷 1725-1732页

作者： Wei Chen Qin Bin 柏正武周兴平 Xiao-lin Xie Key Lab for Large-Format Battery Materials and Systems Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Key Lab of Green Chemical Process Ministry of EducationHubei Key Laboratory of Novel Chemical Reactor and Green Chemical TechnologyWuhan Institute of Technology

Micron-sized cellulose microspheres were prepared through sol-gel method using NaOH/urea solution to dissolve cellulose, then cross-linked by 1,6-hexanylene diisocyanate （HDI）, toluene 2,4-diisocyanate （TDI） and 1,4-phenylene diisocyanate （PDI）, respectively. The reaction conditions for partial modification of the microspheres were studied. The degree of substitution （DS） in cellulose was controlled by adjusting the reaction conditions. HDI-crosslinked microspheres were partially modified with phenyl isocyanate to obtain chiral stationary phases （CSPs）. The CSPs of a lower degree of crosslinking （DC） showed better chiral recognition ability than those of a higher DC. Meanwhile the CSPs prepared by pre- modification exhibited better chiral recognition ability than those prepared by pre-crosslinking.

关键词： Cellulose Microspheres Functionalization Chiral stationary phase Chiral recognition.

来源：评论

学校读者我要写书评

暂无评论

Synthesis of hierarchical shell-core SnO2 microspheres and their gas sensing properties

引用

Chinese Chemical Letters 2020年第8期31卷 2083-2086页

作者： Li Zheng Wenjie Bi Zhao Jin Shantang Liu Key Lab for Green Chemical Process of Ministry of Education School of Chemistry and Environmental EngineeringWuhan Institute of TechnologyWuhan 430073China

Using SnSO4,D-glucose,urea and water,hierarchical shell-core SnO2 microspheres were successfully synthesized via a simple hydrothermal *** characte rization results showed that the sizes of asprepared SnO2 microspheres were 0,6-1μm,with shell thicknesses of 4060 nm,The shell and large core of the SnO2 microspheres were all comprised of the same basic rice-like nanoparticles with diameters of 16-25 nm and lengths of 16-45 *** investigaton showed that the glucose and urea served as structural guiding agents,and urea facilitated the formation of the hierarchical *** as-prepared SnO2 nanomaterials were used to fabricate a gas sensor with an electrode blade used for the gas sensitivity tests,The hierarchical shell-core SnO2 microspheres exhibited high sensitivity and selectivity toward ethanol,with a responsivity of 63.8 for 50 ppm ethanol at 250℃,while the response and recovery time were 7 s and 28 s,***,the responsivity of the materials showed good linearity at ethanol concentrations from 500 ppb to 10 *** simple synthetic method,environmentally-friendly raw materials,and excellent gas sensitivity demonstrate that the as-prepared SnO2 nanomaterial has great potential applications for the sensing of ethanol gas.

关键词： SnO2 microspheres Hydrothermal Shell-core Hierarchical Glucose Urea

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：