检索结果-内蒙古大学图书馆

Chinese Journal of Catalysis 2021年第10期42卷 1667-1676页

作者： Qinghe Zhang Yang Xia Shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

The limited CO_(2)content in aqueous solution and low adsorption amount of CO_(2)on catalyst surface lead to poor photocatalytic CO_(2)reduction activity and ***,the design and fabrication of a novel photocatalytic architecture is reported,accomplished via chemical vapor deposition of polymeric carbon nitride on carbon *** as-obtained samples with a hydrophobic surface exhibit excellent CO_(2)transport and adsorption ability,as well as the building of triphase air-liquid-solid(CO_(2)-H_(2)O-catalyst)joint interfaces,eventually resulting in the inhibition of H2 evolution and great promotion of CO_(2)reduction with a selectivity of 78.6%.The addition of phosphate to reaction environment makes further improvement of CO_(2)photoreduction into carbon fuels with a selectivity of 93.8%and an apparent quantum yield of 0.4%.This work provides new insight for constructing efficient photocatalytic architecture of CO_(2)photoreduction in aqueous solution and demonstrates that phosphate could play a key role in this process.

关键词： Photocatalytic CO_(2)reduction Hydrophobic surface Air-liquid-solid triphase interfaces Mass transport Phosphorylation

Self-Adaptive Control System for Additive Manufacturing Using Double Electrode Micro Plasma Arc Welding

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2021年第3期34卷 285-298页

作者： Nan Li Ding Fan Jiankang Huang Shurong Yu Wen Yuan Miaomiao Han School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Mechanical and Electrical Engineering Lanzhou University of TechnologyLanzhou 730050China

Wire arc additive manufacturing(WAAM)has been investigated to deposit large-scale metal parts due to its high deposition efficiency and low material ***,in the process of automatically manufacturing the high-quality metal parts by WAAM,several problems about the heat build-up,the deposit-path optimization,and the stability of the process parameters need to be well *** overcome these issues,a new WAAM method based on the double electrode micro plasma arc welding(DE-MPAW)was *** circuit principles of different metal-transfer models in the DE-MPAW deposition process were analyzed *** effects between the parameters,wire feed rate and torch stand-off distance,in the process of WAAM were investigated *** addition,a real-time DE-MPAW control system was developed to optimize and stabilize the deposition process by self-adaptively changing the wire feed rate and torch stand-off ***,a series of tests were performed to evaluate the control system’s *** results show that the capability against interferences in the process of WAAM has been enhanced by this self-adaptive adjustment ***,the deposition paths about the metal part’s layer heights in WAAM are ***,the appearance of the WAAM-deposited metal layers is also improved with the use of the control system.

关键词： Double electrode microplasma arc welding Additive manufacturing Wire feed rate Torch stand-off distance Self-adaptive adjustment

Decorating Covalent Organic Frameworks with High-density Chelate Groups for Uranium Extraction

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第2期38卷 433-439页

作者： QIN Xudong TANG Xiaohui MA Yu XU Hong XU Qing YANG Weiting GU Cheng State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640P.R.China Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of EductionSchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228P.R.China CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)Shanghai 201210P.R.China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084P.R.China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhou 510640P.R.China

The extraction of uranium from aqueous solution is highly desirable for sustaining the increasing demand for environmental safety and nuclear ***,we report a strategy using a two-step covalent modification for the synthesis of covalent organic frameworks(COFs)with high-density amidoxime chelate groups at *** introduction of dense amidoxime groups plays a pivotal role in uranium *** resulting COF exhibits strong affinity with the distribution coefficient of 5.2×104 mL/g and a high adsorption capacity of 319.9 mg/*** strategy could be expanded to identify and remove different contaminants by introducing special functional groups.

关键词： Two-step post-synthetic modification High-density amidoxime Uranium adsorption

Synthesis and characterization of iron clusters with an icosahedral [Fe@Fe12]16+ Core

学校读者我要写书评

暂无评论

National Science Review 2024年第4期11卷 123-129页

作者： Gan Xu Yun-Shu Cui Xue-Lian Jiang Cong-Qiao Xu Jun Li Xu-Dong Chen Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry Southern University of Science and Technology Department of Chemistry and Engineering Research Center of Advanced Rare-Earth Materials of Ministry of Education Tsinghua University State Key Laboratory of Coordination Chemistry Nanjing University

Iron-metal clusters are crucial in a variety of critical biological and material systems,including metalloenzymes,catalysts,and magnetic storage ***,a synthetic high-nuclear iron cluster has been absent due to the extreme difficulty in stabilizing species with direct iron-iron *** this work,we have synthesized,crystallized,and characterized a（Tp*）4W4S12(Fe@Fe12) cluster(Tp*=tris（3,5-dimethyl-1-pyrazolyl）borate（1-）),which features a rare trideca-nuclear,icosahedral[Fe@Fe12] cluster core with direct multicenter iron-iron bonding between the interstitial iron（Fei） and peripheral irons（Fep）,as well as Fep…Fepferromagnetic *** chemistry studies reveal that the stability of the cluster arises from the 18-electron shell-closing of the [Fe@Fe12]16+core,assisted by its bonding interactions with the peripheral tridentate [（Tp*）WS3]4-ligands which possess both S→Fe donation and spin-polarized Fe-Wσ *** ground-state electron spin is theoretically predicted to be S=32/2 for the *** existence of low oxidation-state（OS～+1.23） iron in this compound may find interesting applications in magnetic storage,spintronics,redox chemistry,and cluster catalysis.

关键词： Fe13 cluster iron-sulfur cluster low-valence iron iron−iron bond high spin complex

Enhanced Carbamazepine Removal by Oms-2@Acf During the Activated Sludge Treatment

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Bao, Yongfen Yang, Ning Xiao, Lixi Deng, Yuwei Liu, Yang Wu, Zhiyu Yin, Hang Li, Mengru Pei, Xuanyuan Ye, Yuxuan Pan, Fei School of Stomatology and Ophthalmology Xianning Medical Colloge Hubei University of Science and Technology Xianning437100 China School of Environmental Engineering Wuhan Textile University Wuhan430073 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

The use of nanomaterials to enhance bioprocessing for the removal of pharmaceuticals and personal care products (PPCPs) has received increasing attention. However, the interactions between nanomaterials and microbial communities are unclear. This study reveals the potential and mechanism of synthesized octahedral molecular sieve and activated carbon fiber (OMS-2@ACF) composites in enhancing the aerobic microbial capacity of sequencing batch reactor (SBR) for the treatment of carbamazepine. In an SBR, a series of doses (0-1.0 g/L) of OMS-2@ACF were introduced to investigate their impact on the treatment of carbamazepine by activated sludge. OMS-2@ACF demonstrated an enhancing effect on the carbamazepine removal performance of the SBR. Furthermore, the SBR reactor with the addition of 1.0 g/L of OMS-2@ACF exhibited the most effective removal of carbamazepine. Illumina high-throughput sequencing revealed that OMS-2@ACF material altered the composition of the microbial community in the SBR, identifying the Comamonas as the key genus contributing most significantly to the community response. Analysis indicated that the presence of OMS-2@ACF material increased metabolic pathways associated with contaminants degradation, resulting in improved treatment performance of the SBR. © 2023, The Authors. All rights reserved.

关键词： Carbon fibers

In-Situ Growth of Robust and Superhydrophilic Nano-Skin on Electrospun Janus Nanoﬁbrous Membrane Toward Ultra-High Separation Efficiency, Long Cycle Stability, and Antibacterial Activity of Oil/Water Emulsions Separation

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Cheng, Bingbing Yan, Song Li, Yushan Zheng, Long Wen, Xianjie Tan, Yeqiang Yin, Xianze College of Materials Science and Engineering State Key Laboratory of New Textile Materials & Advanced Processing Technology Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing Engineering Research Center of Ministry of Education for Clean Production of Textile Printing and Dyeing National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430200 China Department of Anesthesiology The Second People’s Hospital of Foshan City Guangdong Province Foshan528000 China State Key Laboratory of Bio-Fibers and Eco-Textiles Collaborative Innovation Center of Marine Biobased Fiber and Ecological Textile Technology Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao266071 China

It is difficult for composite fibrous membranes to achieve up to 99.5% separation eﬃciency for oil/water emulsions under cycling separation. Herein, a simple method is developed to in-situ grow surperhydrophilic nanocoating on a single electrospun polyvinylidene ﬂuoride (PVDF) fiber surface for fabricating asymmetric wettable Janus PVDF fibrous membranes. Particularly, polysaccharide fluids with zwitterionic polymer chains are generated from the nanoﬁber subsurface in an inside-out way during the electrospinning process, forming the robust superhydrophilic nanocoating (99.5 %), a high flux (up to 4325 L·m-2·h-1·bar-1), antibacterial activity (>99%) and antifoul properties. Moreover, the obtained Janus membranes own surprising flux cycling stability and retained 99.5% separation efficiency after 12 cycles without any treatment, indicating that the multi-arm polysaccharide fluids acted as the water channel in such membrane and accelerated the ﬂow of water molecules. The Janus PVDF composite membranes have potential applications for oily wastewater treatment and water purification in the future. © 2023, The Authors. All rights reserved.

关键词： Wastewater treatment

Efficient Adsorption of No Onto K, Na-Embedded Porous Carbon Material Prepared by Using Zinc-Bearing Dust as Activator

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Wang, Dingzheng Yang, Jinlin Ma, Shaojian Huo, Xingnan State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China

The increasingly generation of NO-containing flue gases and zinc-bearing dusts has posed huge pressure to the environment. A green process of integration of reduction of zinc-bearing dusts and preparation of porous carbon material with high NO adsorption capacity was developed and its mechanism was clarified in this paper. The reduced dusts with high content of iron (70.52%) and low contents of harmful elements (0.017% Zn, 0.015 % K and 0.026% Na) could be used as high-quality raw material for ironmaking while the K, Na-embedded porous carbon material (APC) with surface area of 390.38 m2/g can be used as effective adsorbent for NO pollution control. The adsorption property and mechanism of NO on APC was investigated. It was found that the maximal removal rate of NO could reach 96.15%, and the K, Na on porous carbon material could promote the chemisorption process of NO and increase the NO adsorption efficiency of APC. The hazardous waste was successfully utilized to treat the flue gas in this work. © 2024, The Authors. All rights reserved.

关键词： Dust

Ultra-High-Performance Aluminum-Based Hybrid Supercapacitors Prepared for Nitrogen-Doped Micro-Mesoporous Carbon Sphere

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Sun, Weiyi Xing, Lingli Zhang, Bomian Shi, Wenchao Ren, Jingke Zhang, Xinyu Xiong, Fangyu An, Qinyou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Xiangyang441000 China

Aluminum-based devices are promising candidates for the next generation of energy storage due to the advantages of high energy density, high safety, and low cost. The aluminum ion batteries (AIBs) are based on the electrochemical intercalation/deintercalation reactions against the electrodes, but the selection of the cathode is limited to present. The cathode reactions of cation-type AIBs are plagued by the poor kinetics of solid-state diffusion from high charge density of Al3+ and anion-type AIBs show poor capacity due to the intercalation of large-sized chloroaluminate (AlCl4−) active ions into the cathode. Here, we deliberately adopted a hybrid capacitor-battery mechanism and employed a nitrogen-doped micro-mesoporous carbon sphere of a high specific area as the cathode and aluminum as the anode to construct an aluminum-based energy storage device. After optimization, it exhibits an excellent discharge capacity of 224 mA h g−1 at a current density of 300 mA g−1, and exceptional cycling performance with a discharge capacity as high as 114 mA h g−1 at 10 A g−1 after 35000 cycles. The ultra-high-performance aluminum-based hybrid supercapacitor (Al-HSC) may lead to a new direction for the development of aluminum-based energy storage devices. © 2023, The Authors. All rights reserved.

关键词： Aluminum

Boosting Effective Capacitance of Nano-Grained Batio3-Based Ceramics Via a Precise Core-Shell Structure Optimization Strategy

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Zhu, Chaoqiong Cai, Ziming Xiao, Mengjian Jiang, Ying Feng, Peizhong Li, Shiheng Cao, Xiuhua Fu, Zhenxiao Wang, Xiaohui School of Materials Science and Physics China University of Mining and Technology Jiangsu Xuzhou221116 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China State Key Laboratory of Advanced Materials and Electronic Components Guangdong Fenghua Advanced Technology Holding Co. Ltd. Guangdong Province Zhaoqing526000 China

Under the trend of miniaturization of multilayer ceramic capacitors (MLCCs), thinner dielectric layers withstood a higher electric field will suffer larger deterioration in capacitance. Thus, it is urgent to improve the DC-bias stability and maintain a considerable effective capacitance under high electric fields to match the requirements of high-end MLCCs. In this work, a strategy of regulating the DC-bias performance via the core-shell structure modulation is proposed. Both numercial predictions and experimental verifications show that the DC-bias performance of core-shell structured ceramic samples can be significantly optimized under the double action of shell thickening and shell dielectric constant increasing, achieving considerable dielectric constant and DC-bias stability simultaneously. The Dy-Mg-co-doping BT-based ceramics with an average grain size about 180nm successfully achieved an outstanding DC-bias performance, realizing a high dielectric constant about 2000 together with a low DC-bias attenuation coefficient of -23.6%@4 kV/mm and guaranteeing a high effective capacitance especially in high fields. © 2024, The Authors. All rights reserved.

关键词： Finite element method

Review of interface tailoring techniques and applications to improve insulation performance

学校读者我要写书评

暂无评论

High Voltage 2022年第1期7卷 12-31页

作者： Mingxiao Zhu Jianyi Xue Yanhui Wei Guochang Li Guanjun Zhang College of New Energy China University of Petroleum(East China)QingdaoChina State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong UniversityXi'anChina Institute of Advanced Electrical Materials Qingdao University of Science and TechnologyQingdaoChina

Interfaces between different materials,for instance,electrode-dielectrics and vacuum/air/SF6‐insulators and oilpaper,are universal in high‐voltage insulation *** tailoring of the interfacial properties,*** structures,micro‐/nanoscale morphology,the charge injection barrier,trap states,and surface conductivity,is thought to be an effective approach to improve insulation properties such as breakdown and flashover strength,corona/tracking resistance,and *** this article,the authors review recent progress in interface tailoring methods and their application to improve various insulation *** potential application scenarios of interface tailoring in different facilities are first summarised,and the desired insulation properties of various applications are *** tailoring methods are classified as physical/chemical surface modification and surface coating(inorganic,organic and composite),and the features of different techniques are described in *** structure-property relationships between interfacial states and various microscopic parameters such as charge injection barrier,trap distribution and surface conductivity are discussed together with the tailoring mechanisms for different insulation ***,the future development prospects of interface tailoring methods and their applications,***-functional coating and stimuli-response smart coating,are presented.

关键词： coating interface insulation