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Bifunctional passivation by lewis-base molecules for efficient printable mesoscopic perovskite solar cells

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Journal of Energy Chemistry 2024年第9期96卷 177-184页

作者： Hang Yang Jianhong Zhao Xiaodong Ren Tong Zhou Henbing Zhang Weilong Zhang Jin Zhang Guangzhi Hu Yuming Zhang Wen-Hua Zhang qingju liu Yunnan Key Laboratory for Micro/Nano Materials & Technology National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan UniversityKunming 650091YunnanChina Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science Yunnan UniversityKunming 650091YunnanChina

Printable mesoscopic perovskite solar cells(PM-PSCs)possess notable merits in terms of cost-effectiveness,easy manufacturing,and large scale ***,the absence of a hole transport layer contributes to the exacerbation of carrier recombination,and the defects between the perovskite and electron transport layer(ETL)interfaces significantly decrease the efficiency of the *** this study,a bifunctional surface passivation approach is proposed by applying a thioacetamide(TAA)surfactant on the mesoporous TiO_(2)*** results demonstrate that TAA molecules could interact with TiO_(2),thereby diminishing the oxygen vacancy ***,the amino group and sulfur atoms in TAA molecules act as Lewis base to effectively passivate the uncoordinated Pb^(2+)in perovskite and improve the morphology of perovskite,and decrease the trap-state density of *** TAA passivation mechanism improves the alignment of energy levels between TiO_(2)and perovskite,facilitating electron transport and reducing carrier ***,the TAA-passivated device achieved a champion power conversion efficiency(PCE)of 17.86%with a high fill factor(FF)of 79.16%and an open-circuit voltage(V_(OC))of 0.971 *** investigation presents a feasible strategy for interfacial passivation of the ETL to further improve the efficiency of PM-PSCs.

关键词： Perovskite solarcells Carbon electrode Thioacetamide Interfacial passivation

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何军琴教授治疗复发性流产经验

中国中医药现代远程教育 2024年第3期22卷 50-53页

作者：刘青菊衡水市中西医结合医院妇科河北衡水053200

复发性流产病因复杂,缺乏特异性临床表现,诊治有一定难度。中医治疗以补肾健脾、养血固冲为原则。何军琴教授从事中医妇科诊疗、科研、教学工作20余年,具有丰富的临床经验,治疗该病以一轴四期为主线,以中医治未病思想为指导,强调整体观... 详细信息

复发性流产病因复杂,缺乏特异性临床表现,诊治有一定难度。中医治疗以补肾健脾、养血固冲为原则。何军琴教授从事中医妇科诊疗、科研、教学工作20余年,具有丰富的临床经验,治疗该病以一轴四期为主线,以中医治未病思想为指导,强调整体观念与辨证论治;善于应用温肾养血、活血疏肝中药汤剂序贯疗法治疗复发性流产,效果显著。

关键词：滑胎复发性流产中药序贯疗法名医经验何军琴

Single atom catalyst for electrocatalysis

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Chinese Chemical Letters 2021年第10期32卷 2947-2962页

作者： Jianan Su Linzhou Zhuang Shusheng Zhang qingju liu Longzhou Zhang Guangzhi Hu School of Materials and Energy and Yunnan Key Laboratory for Micro/nano Materials&Technology Institute of Optoelectronic Information MaterialsYunnan UniversityKunming 650091China School of Chemical Engineering East China University of Science and TechnologyShanghai 200237China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450000China

Single atom catalyst(SAC)refers to a novel catalyst with the active metal atoms individually anchored on the *** atom catalysts present the unique appeal due to the high atomic availability and specific activity,as well as the high pathway ***,we summarized the classification,preparation,characterization,and application of single atom ***,the current bottlenecks and the outlooks of the SAC research are discussed.

关键词： Single atom catalyst Electrocatalysis Oxygen reduction reaction Hydrogen evolution reaction Oxygen evolution reaction

Highly Efficient Co-removal of Heavy Metals in Wastewater from Chemical Oxygen Demand Testing Instrument by Cysteine-functionalized Magnetic Nanoparticles

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Chemical Research in Chinese Universities 2014年第3期30卷 472-479页

作者： CAI Botai GU Pei ZENG Lixi ZHOU Ying liu qingju LI Xun YUAN Longfei HE Yujian College of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China Stake Key Laboratory of Natural and Biomimetic Drugs Peking University Beijing 100191 P R. China Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of Sciences Urumqi 830011 P. R. China

Wastewater discharged from chemical oxygen demand（COD） testing instrument was generally difficult to treat due to its high content of heavy metals and very low pH. In this study, a kind of cysteine-functionalized magnetic nanoparticles（MNPs-Cys） was synthesized and used to treat the wastewater. The synthesized MNPs-Cys as the adsorbent for heavy metal removal from aqueous solutions were systematically investigated. The adsorption dynamic process fit the Langmuir isotherms well with a maximum adsorption capacity of 76.92 mg/g for Cu（Ⅱ）. The adsorbent could be easily regenerated by 0.1 mol/L HNO3, which exhibited a high adsorption performance within 10 cycles. This adsorbent, combined with a developed pretreatment approach, could make Cr（Ⅲ）, Hg（Ⅱ） and Ag（Ⅰ） in the wastewater discharged from COD testing instrument effectively removed and the removal efficiency is more than 99%. This work gave a new insight into the design and synthesis of high-performance materials for treating wastewater with heavy metals.

关键词： Magnetic nanoparticle Heavy metal Adsorption Magnetic separation Wastewater

Synthesis and properties of carbon and yttrium co-doped TiO2 photocatalyst

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Synthesis and properties of carbon and yttrium co-doped TiO2...

Advances of the functionalized carbon nitrides for electrocatalysis

2014中国功能材料科技与产业高层论坛

作者： liu Jianmei ZHOU Xinghua ZHU Zhongqi ZHANG Jin liu qingju Yunnan Key Laboratory for Micro/nano Materials &Technology Yunnan University

ISBN: (纸本)9783038353522

TiO photocatalysts doped with different element of C and Y were synthesized by sol-gel process using glucose,yttrium nitrate and tetrabutyl titanate as *** characterized by XRD,XPS,TEM,PL and UV-Vis *** photocatalytic activity of samples was investigated by photocatalytic degradation of methylene-blue(MB)under the irradiation of fluorescent *** results indicate that C ion and Y ion are incorporated into the lattice of TiO,and C doping accelerate phase transition from anatase to rutile phase,but Y doping inhabits the phase *** was also found that both C and Y doping can broaden the absorption spectrum to visible light region and inhibit the recombination of the photo-generated electron and hole *** synergy effect of codoped C and Y ions provides C-Y-TiO sample better photocatalytic activity than that of the single-doped samples and P25 under fluorescent *** photo-catalytic activity of the sample with C,Y co-doped is the best under the irradiation of fluorescent *** is94.23%within 3 hours and significantly higher than that of Degussa P25(44.72%)under the same experimental conditions.

关键词： TiO2 C-Y-doping Sol-gel chemistry photocatalyst

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Carbon Energy 2022年第2期4卷 211-236页

作者： Qianqian Fan Jianan Su Tao Sun Zenghui Bi Huaisheng Wang Shusheng Zhang qingju liu Longzhou Zhang Guangzhi Hu Yunnan Key Laboratory for Micro/Nano Materials&Technology School of Materials and EnergyYunnan UniversityKunmingChina School of Chemistry and Chemical Engineering Liaocheng UniversityLiaochengChina College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhouChina Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunmingChina

Over the past few decades,the design and development of carbon materials have occurred at a rapid *** particular,these porous graphene-like carbon nitride materials have received considerable attention due to their superior structures and performances in the energy transformation *** this review,nitrogenated holey two-dimensional graphene and polymeric carbon nitride will be discussed in *** structural properties,synthetic methods,and applications including electrocatalytic reactions,such as hydrogen evolution reaction,oxygen reduction reaction,oxygen evolution reaction,and nitrogen reduction reaction,will be presented in ***,we will present the outlooks on the current obstacles to the development of carbon nitride *** comprehensive understanding will help guide and motivate researchers to develop and modify carbon nitride materials with better properties in the future.

关键词： C_(2)N-h2D electrocatalysis PCN synthesis

Remarkable synergistic effect in cobalt-iron nitride/alloy nanosheets for robust electrochemical water splitting

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Journal of Energy Chemistry 2022年第2期31卷 405-414页

作者： Mingpeng Chen Di liu Baoye Zi Yuyun Chen Dong liu Xinyu Du Feifei Li Pengfei Zhou Ye Ke Jielei Li Kin Ho Lo Chi Tat Kwok Weng Fai Ip Shi Chen Shuangpeng Wang qingju liu Hui Pan Institute of Applied Physics and Materials Engineering University of MacaoMacaoChina Yunnan Key Laboratory for Micro/Nano Materials&Technology National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091YunnanChina Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of MacaoMacaoChina Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacaoChina

Design and synthesis of noble-metal-free bifunctional catalysts for efficient and robust electrochemical water splitting are of significant importance in developing clean and renewable energy sources for sustainable energy ***,a simple three-step strategy is reported to construct cobalt-iron nitride/alloy nanosheets on nickel foam(CoFe-NA/NF)as a bifunctional catalyst for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).The electrocatalyst with optimized composition(CoFe-NA2/NF)can achieve ultralow overpotentials of 73 mV and 250 mV for HER and OER,respectively,at a current density of 10 mA cm^(-2) in 1 M ***,the electrolyzer based on this electrocatalyst is able to boost the overall water splitting with a cell voltage of 1.564 V to deliver 10 mA cm^(-2) for at least 50 h without obvious performance ***,our experiment and theoretical calculation demonstrate that the combination of cobalt-iron nitride and alloy can have low hydrogen adsorption energy and facilitate water dissociation during *** addition,the surface reconstruction introduces metal oxyhydroxides to optimize the OER *** work may pave a new pathway to design bifunctional catalysts for overall water splitting.

关键词： Bifunctional electrocatalyst Metal nitride/alloy nanocomposite Overall water splitting High performance

Influence of carbon and yttrium co-doping on the photocatalytic activity of mixed phase TiO_2

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Chinese Journal of Catalysis 2017年第10期38卷 1688-1696页

作者： Honglin Gao Jianmei liu Jin Zhang Zhongqi Zhu Genlin Zhang qingju liu nano Materials & Technology Yunnan University Kunming 650091 Yunnan China School of Materials Science and Engineering Yunnan Key Laboratory for Micro Kunming 650091 Yunnan China

Mixed phase TiO2photocatalysts doped with C and Y were synthesized by a sol‐gel *** effects of C and Y doping and annealing temperatures on the structural and optical properties,and photocatalytic activity were *** found that both C and Y doping can broaden the absorption spectrum of TiO2to the visible light region and inhibit recombination of photogenerated electron/hole *** incorporation of Y into the TiO2lattice inhibited growth of crystalline grains,which increased the specific surface area and enhanced the photocatalytic *** photocatalytic performance of the samples was investigated in the photocatalytic degradation of methyl blue under visible light *** rate of methyl blue degradation over the(C,Y)‐co‐doped TiO2sample was much higher than those of undoped TiO2,C‐TiO2,and Y‐***,the apparent first‐order rate constant of the co‐doped sample was3.5times as large as that of undoped mix phase TiO2under the same experimental *** enhanced photocatalytic activity can be attributed to the synergic effect of(C,Y)‐co‐doping and the formation of an appropriate crystalline structure.

关键词： Titanium dioxide Co‐doping Mixed phase Phase control Visible light photocatalysis

非金属对锐钛矿相TiO_2电子结构和光学性质掺杂效应的第一性原理计算（英文）

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稀有金属材料与工程 2015年第7期44卷 1568-1574页

作者：赵宗彦赵响易娟柳清菊昆明理工大学云南昆明650093 云南大学纳米材料与技术高校重点实验室云南昆明650091

采用基于密度泛函理论超软赝势平面波方法的第一性原理计算了纯锐钛相Ti O2和非金属(B,C,N,F,P,S,Cl)掺杂体系的晶体结构、电子结构和光学性质。计算结果表明,非金属掺杂后由于晶格常数、键长、原子电荷分布的变化导致Ti O2的八面体偶... 详细信息

采用基于密度泛函理论超软赝势平面波方法的第一性原理计算了纯锐钛相Ti O2和非金属(B,C,N,F,P,S,Cl)掺杂体系的晶体结构、电子结构和光学性质。计算结果表明,非金属掺杂后由于晶格常数、键长、原子电荷分布的变化导致Ti O2的八面体偶极矩增大,这对光生电子-空穴对的分离是十分有利的。由掺杂物的p电子态与O的2p电子态、Ti的3d电子杂化而形成的杂质能级的存在使大多数掺杂体系的带隙减小,从而使Ti O2的基本吸收带边红移到可见光区。根据理论结果,系统分析和比较了非金属对锐钛矿相Ti O2电子结构和光学性质的掺杂效应,同时非金属掺杂对Ti O2光催化材料在可见光激发下的作用也得到了分析。计算结果解释了部分非金属掺杂可以使锐钛矿相Ti O2在可见光激发下具有较高光催化活性的原因。

关键词：锐钛矿相TiO2 非金属掺杂光催化活性第一性原理计算