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cuo-g-CN/C复合材料的模板诱导合成及其电化学性能

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复合材料学报 2024年

作者：黄晨阳刘成宝郑磊之陈丰邱永斌孟宪荣陈志刚苏州科技大学江苏省环境功能材料重点实验室苏州科技大学材料科学与工程学院江苏水处理技术与材料协同创新中心江苏省陶瓷研究所有限公司苏州市环境科学研究所

多价铜基氧化物的理论比容量较高，但自身导电性和稳定性差；石墨相氮化碳(g-C3N4)稳定性好、氮含量高、合成方法简单，但其电容性能不佳；生物质炭具有较大的比表面积、相对较好的导电性和刚性结构。为使各相优势得到充分发挥，并且尽... 详细信息

多价铜基氧化物的理论比容量较高，但自身导电性和稳定性差；石墨相氮化碳(g-C3N4)稳定性好、氮含量高、合成方法简单，但其电容性能不佳；生物质炭具有较大的比表面积、相对较好的导电性和刚性结构。为使各相优势得到充分发挥，并且尽量弥补其缺陷，本文以尿素为g-C3N4前驱体，杏鲍菇为模板诱导合成了具有疏松多孔结构的g-C3N4/C两相复合材料，后使用水热法将cuo均匀负载在g-C3N4/C表面及孔洞内得到cuo-g-C3N4/C三相复合材料。电化学测试结果表明，cuo-g-C3N4/C的最高比电容为262.8F/g，2000次恒电流充放电循环后的电容保持率为97%，在不同电流密度下仍具有良好的充放电性能，cuo-g-C3N4/C的电容性能和稳定性能较好。这表明cuo和g-C3N4/C的三相复合不仅提高了cuo的导电性，而且使g-C3N4的电容性能得到改善，从而使整体材料的储能性能、导电性和稳定性得到提升。

关键词： g-C N cuo 电化学生物质炭模板诱导超级电容器

cuo/CeO_(2) p−n异质结光催化降解亚甲基蓝的性能及机理

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Transactions of Nonferrous Metals Society of China 2024年第6期34卷 1951-1964页

作者：陈欢欢罗绍华雷雪飞滕飞纪献兵李晓东东北大学材料科学与工程学院沈阳110819 东北大学秦皇岛分校河北省电介质与电解质功能材料重点实验室秦皇岛066004 河北环境工程学院环境工程系秦皇岛066102

采用简单微波回流法和均相沉淀技术合成cuo/CeO_(2) p−n异质结复合材料,并对其光催化降解亚甲基蓝溶液的性能进行研究。cuo/CeO_(2)异质结复合材料的降解效率明显强于CeO_(2)。结果表明,以Cu/Ce摩尔比为1/3制备的复合材料(1/3 Cu/Ce)的... 详细信息

采用简单微波回流法和均相沉淀技术合成cuo/CeO_(2) p−n异质结复合材料,并对其光催化降解亚甲基蓝溶液的性能进行研究。cuo/CeO_(2)异质结复合材料的降解效率明显强于CeO_(2)。结果表明,以Cu/Ce摩尔比为1/3制备的复合材料(1/3 Cu/Ce)的光催化活性最高,在180 min内降解效率达到96.2%。cuo和CeO_(2)之间形成的p−n异质结促进了光生载流子的分离和传输,从而提高了其光催化活性。计算了cuo/CeO_(2)异质结的能带位置偏移,其价带偏移(∆EVBO)为1.58 eV,导带偏移(∆ECBO)为−0.48 eV。计算结果进一步证明cuo与CeO_(2)之间形成了p−n异质结。

关键词： cuo CeO_(2) p−n异质结光催化机理亚甲基蓝

氮掺杂生物质炭耦合氧化铜材料用于电催化还原CO

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太原理工大学学报 2024年

作者：郭天宇张佳宁白德豪张金男祁彧王红涛中石油煤层气有限责任公司忻州分公司气体能源高效利用山西省重点实验室太原理工大学环境科学与工程学院

电催化技术将CO2转化为高附加值燃料和化学品具有广阔的应用前景。然而，开发具有性能优异的电催化剂仍具有巨大的挑战性。本文采用麦麸皮为生物质炭前驱体，利用热解法制备氮掺杂生物质炭材料(NC)，进一步通过水热法与cuo进行耦合，构... 详细信息

电催化技术将CO2转化为高附加值燃料和化学品具有广阔的应用前景。然而，开发具有性能优异的电催化剂仍具有巨大的挑战性。本文采用麦麸皮为生物质炭前驱体，利用热解法制备氮掺杂生物质炭材料(NC)，进一步通过水热法与cuo进行耦合，构筑了一系列的cuo@NC复合材料。采用多种表征手段，对其晶相、微观形貌和结构及元素价态进行分析，并通过电催化还原CO2反应来探讨其电催化性能。结果表明，在160 ℃合成温度下获得的复合催化剂(cuo@NC-160 ℃)对乙烯有较高的选择性，在-1.18V vs. RHE时，法拉第效率为26.85%。研究为制备廉价、高效的cuo基电催化剂提供了一种可行路径。

关键词： cuo 生物质炭二氧化碳电催化还原

cuo及其他过渡金属氧化物纳米结构材料在锂离子电池中的研究进展

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铜业工程 2024年第1期 148-160页

作者：李鑫萍张德林天津工业大学材料科学与工程学院天津300387 量子材料与器件研究院天津工业大学电子与信息工程学院天津300387 沧州市天津工业大学研究院河北沧州061000

锂离子电池(LIBs)因其能量密度高、体积小、质量轻等优点在便携式储能设备中广受欢迎。然而,传统商用LIBs存在可逆容量低、循环性能差、成本高、安全性差等问题,需要进一步提高其功率密度、能量密度、寿命和安全性。过渡金属氧化物负极... 详细信息

锂离子电池(LIBs)因其能量密度高、体积小、质量轻等优点在便携式储能设备中广受欢迎。然而,传统商用LIBs存在可逆容量低、循环性能差、成本高、安全性差等问题,需要进一步提高其功率密度、能量密度、寿命和安全性。过渡金属氧化物负极材料提供的可逆容量与传统石墨材料相比高2~3倍,且具有更高的嵌锂电位和更高的安全性。同时,纳米结构电极材料由于其高比容量、快速的电子/离子转移速率,以及具有可减轻体积膨胀的自由空间等优点,成为电池电极的理想材料。本文综述了氧化铜(cuo)纳米结构材料用于LIBs的研究进展,包括球状、线状、片状等纳米结构,还阐述了它们的优势;还介绍了其他过渡金属氧化物纳米结构材料在LIBs中的应用;最后,讨论了cuo及其他过渡金属氧化物纳米结构材料未来在LIBs中应用的机遇和挑战。

关键词：锂离子电池 cuo 过渡金属氧化物纳米结构

三大率值对烧制水泥熟料固化重金属的影响研究

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中国建材科技 2024年第2期33卷 83-86页

作者：李飞甘肃交通职业技术学院甘肃兰州730070

通过调研多家水泥厂,选定三组率值(率1配方:KH=1.01,SM=2.62,IM=1.37;率2配方:KH=1.01,SM=2.71,IM=1.39;率3配方:KH=1.01,SM=2.71,IM=1.35)进行试验。分别掺入0.5%、1.0%、2.0%的cuo试剂,煅烧至1200℃、1250℃、1300℃、1350℃、1400℃、1450℃,利用化学分析和XRD等方法对熟料进行检测。结果表明,cuo既是矿化剂又是助溶剂;随着煅烧温度的升高,煅烧试样的f-CaO含量总体呈下降趋势;率2配方时的游离氧化钙的含量最少且较稳定;随着重金属掺量的增大,熟料主要矿物相C_(3)S的形成温度明显降低,且在1400℃、1450℃下cuo掺烧量为1.0%和2.0%时均有液相出现。

关键词： cuo 水泥熟料易烧性 f-CaO

Optimized Electronic Modification of S-Doped cuo Induced by Oxidative Reconstruction for Coupling Glycerol Electrooxidation with Hydrogen Evolution

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Nano-Micro Letters 2023年第10期15卷 622-637页

作者： Ruo‑Yao Fan Xue‑Jun Zhai Wei‑Zhen Qiao Yu‑Sheng Zhang Ning Yu Na Xu Qian‑Xi Lv Yong‑Ming Chai Bin Dong China State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580People’s Republic of China

Glycerol(electrochemical) oxidation reaction(GOR) producing organic small molecule acid and coupling with hydrogen evolution reaction is a critical aspect of ensuring balanced glycerol capacity and promoting hydrogen generation on a large scale. However, the development of highly efficient and selective non-noble metal-based GOR electrocatalysts is still a key problem. Here, an S-doped cuo nanorod array catalyst(S-cuo/CF) constructed by sulfur leaching and oxidative remodeling is used to drive GOR at low potentials: It requires potentials of only 1.23 and 1.33 V versus RHE to provide currents of 100 and 500 mA cm^(-2), respectively. Moreover, it shows satisfactory comprehensive performance(at 100 mA cm^(-2), V_(cell) = 1.37 V) when assembled as the anode in asymmetric coupled electrolytic cell. Furthermore, we propose a detailed cycle reaction pathway(in alkaline environment) of S-doped cuo surface promoting GOR to produce formic acid and glycolic acid. Among them, the C–C bond breaking and lattice oxygen deintercalation steps frequently involved in the reaction pathway are the key factors to determine the catalytic performance and product selectivity. This research provides valuable guidance for the development of transition metal-based electrocatalysts for GOR and valuable insights into the glycerol oxidation cycle reaction pathway.

关键词： Glycerol oxidation reaction(GOR) Hydrogen evolution reaction(HER) cuo Oxidative reconstruction Electronic modification

Simultaneous oxidation of Mn (Ⅱ) and As (Ⅲ) on cupric oxide (cuo) promotes As (Ⅲ) removal at circumneutral pH

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Journal of Environmental Sciences 2023年第3期125卷 691-700页

作者： Lingqun Zeng Biao Wan Qian Wang Yupeng Yan Yuanzhi Tang Xionghan Feng State Environmental Protection Key Laboratory of Soil Health and Green Remediation College of Resources and EnvironmentHuazhong Agricultural UniversityWuhan 430070China School of Earth and Atmospheric Sciences Georgia Institute of TechnologyAtlantaGA 30332-0340USA Department of Environmental and Sustainable Engineering University at AlbanySUNY1400 Washington AvenueAlbanyNY 12222USA Geomicrobiology Center for Applied GeosciencesUniversity of Tuebingen72076 TuebingenGermany. Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province College of Land Resources and EnvironmentJiangxi Agricultural UniversityNanchang 330045China

Oxidation of Mn (Ⅱ) or As(Ⅲ) by molecular oxygen is slow at pH<9,while they can be catalytically oxidized in the presence of oxide minerals and then removed from contaminated water.However,the reaction mechanisms on... 详细信息

Oxidation of Mn (Ⅱ) or As(Ⅲ) by molecular oxygen is slow at pHcuo,α-Fe2O_(3)and ZnO) and investigated the simultaneous oxidation and removal of Mn (Ⅱ) and As (Ⅲ) through batch experiments and spectroscopic analyses.Among the tested oxides,cuo and α-Fe2O_(3)possess greater catalytic activity toward Mn (Ⅱ) oxidation.Oxidation and removal kinetics of Mn (Ⅱ) and As (Ⅲ) on cuo indicate that O_(2)is the terminal electron acceptor for Mn (Ⅱ) and As (Ⅲ) oxidation on cuo,and Mn (Ⅱ) acts as an electron shuttle to promote As (Ⅲ) oxidation and removal.The main oxidized product of Mn (Ⅱ) on cuo is high-valent MnO_(x)species.This newly formed Mn (Ⅲ) or Mn (IV) phases promote As (Ⅲ) oxidation on cuo at circumneutral pH 8 and is reduced to Mn (Ⅱ),which may be then released into solution.This study provides new insights into metal oxide-catalyzed oxidation of pollutants Mn (Ⅱ) and As (Ⅲ) and suggests that cuo should be considered as an efficient material to remediate Mn (Ⅱ) and As(Ⅲ)contamination.

关键词： Simultaneous oxidation Mn(II) As(III) cuo Metal oxides

Loading cuo on the surface of MgO with low-coordination basic O^(2-)sites for effective enhanced CO_(2) capture and photothermal synergistic catalytic reduction of CO_(2) to ethanol

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Chinese Journal of Chemical Engineering 2023年第9期61卷 58-67页

作者： Ting Li Hongxia Guo Xiao Wang Huan Wang Li Liu Wenquan Cui Xiaoran Sun Yinghua Liang College of Chemical Engineering Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic MaterialsNorth China University of Science and TechnologyTangshan 063210China

The higher capacity of CO_(2)adsorption on the surface of magnesium oxide(MgO)with low-coordination O^(2-)sites would effectively enhance the catalytic reduction of CO_(2).Herein,a series of copper oxide(cuo)and MgO composites with different mass ratios have been prepared by hydrothermal method and used for photothermal synergistic catalytic reduction of CO_(2)to ethanol.The catalyst with cuo mass ratio of 1.6% shows the best yield(15.17μmol·g^(-1)·h^(-1))under 3 h Xenon lamp illumination.The improved performance is attributable to the loose nano-sheet structure,uniform dispersion of active sites,the increased specific surface area,medium-strength basicity,the high separation efficiency of electrons and holes,and the formation of Mg-O-Cu species.The synthesized cuo and MgO composites with loose nano-sheet structure facilitate the diffusion of reactants CO_(2),so an excellent CO_(2)adsorption performance can be obtained.Meanwhile,the introduction of cuo in the form of bivalence provides higher specific surface area and porosity,thus obtaining more active sites.More importantly,the Mg-O-Cu species make the donation of electrons from MgO to CO_(2)easier,resulting in the breaking of the old Mg-O bond and the formation of C-O bond,thus promoting the adsorption and conversion of CO_(2)to ethanol.

关键词： CO_(2)reduction Photothermal catalysis Ethanol MgO cuo

Heterojunctioned cuo/Cu_(2)O catalyst for highly efficient ozone removal

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Journal of Environmental Sciences 2023年第3期125卷 340-348页

作者： Guojun Ma Wenxiang Tang AnqiWang Le Zhang Jian Guan Ning Han Yunfa Chen Key Laboratory of Science and Technology on Particle Materials Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering Sichuan UniversityChengdu 610065China

In recent years, near surface ozone pollution, has attracted more and more attention,which necessitates the development of high efficient and low cost catalysts. In this work,Cu O/Cu_(2)O heterojunctioned catalyst is fabricated by heating Cu_(2)O at high temperature, and is adopted as ozone decomposition catalyst. The results show that after Cu_(2)O is heated at180℃conversion of ozone increases from 75.2% to 89.3% at mass space velocity 1,920,000cm^(3)/(g·hr) in dry air with 1000 ppm V ozone, which indicates that this heterojunction catalyst is one of the most efficient catalysts reported at present. Catalysts are characterized by electron paramagnetic resonance spectroscopy and ultraviolet photoelectron spectroscopy,which confirmed that the heterojunction promotes the electron transfer in the catalytic process and creates more defects and oxygen vacancies in the Cu O/Cu_(2)O interfaces. This procedure of manufacturing heterostructures would also be applicable to other metal oxide catalysts, and it is expected to be more widely applied to the synthesis of high-efficiency heterostructured catalysts in the future.

关键词： Cu_(2)O Ozone decomposition cuo Heterojunction