检索结果-内蒙古大学图书馆

All Green Solvent Engineering of Organic-Inorganic Hybrid Perovskite Layer for High-Performance Solar Cells

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Wei, Jinquan Cao, Xiaobing Hao, Lei Liu, Zijin Su, Gengyang He, Xin Zeng, Qingguang School of Applied Physics and Materials Wuyi University Jiangmen529020 China School of Textile Materials and Engineering Wuyi University Jiangmen529020 China State Key Lab of New Ceramics and Fine Processing Education Ministry Key Laboratory for Advanced Materials Processing Technology School of Materials Science and Engineering Tsinghua University Beijing100084 China

Solvent engineering technology is an important approach for fabrication of high quality perovskite films, and thereby high-performance perovskite solar cells (PSCs). However, it is strongly dependent on the usage of toxic solvents, including the host solvent and anti-solvent to prepare perovskite solutions and control the crystallization of perovskite films, respectively. The usage of toxic solvents poses a serious threat to the health of manufactures and the safety of environment. Therefore, the solvent toxicity has become a burning issue before the forthcoming commercialization of PSCs. Here, we report an all green solvent engineering to prepare high quality (FAPbI3)1-x(MAPbBr3)x (x=0, 0.05) films, where a green Lewis base solvent of triethyl phosphate (TEP) is used to prepare (FAPbI3)1-x(MAPbBr3)x/TEP solution, and a non-polar solvent of dibutyl ether (DEE) is used as anti-solvent. In this approach, a new intermediate phase film is formed after spin-coating the (FAPbI3)1-x(MAPbBr3)x/TEP solution on substrates, followed by dropping of DEE during spinning, and subsequently convert into perovskite films by annealing. Finally, it enables a PCE of 18.65% (x=0) and 20.13% (x=0.05) basing on a typical device configuration of FTO/SnO2/Perovskite/Spiro-OMeTAD/Au, which is the highest value for the all green solvent processed PSCs. More importantly, the all green solvent engineering approach can also be used to prepare another typical perovskite of MAPbI3 films for efficient solar cells. Therefore, this work not only provides an universial approach to prepare typical organic-inorganic hybrid perovskite films, but also addresses the solvent toxicity during the production of perovskite films. The green solvent engineering may pave the way for future industrial scale production of PSCs under environment friendly conditions. © 2022, The Authors. All rights reserved.

关键词： Perovskite solar cells

Unraveling Photothermal-Enhanced Bulk Charge Transport and Surface Oxygen Reactions in Tio2 Photoanodes for Highly Efficient Photoelectrochemical Water Oxidation

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Liu, Xueqin Huang, Jing Wang, Jingnan Lin, Kaijie He, Bing Hu, Xiaoqin Yang, Yingkui Wang, Yang Li, Zhen State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education Hubei Key Laboratory of Catalysis and Materials Science South-Central University for Nationalities Wuhan430074 China

Titanium dioxide (TiO2) has been extensively used as an important photoanode material for photoelectrochemical (PEC) water splitting, but its activity is greatly hindered by the low charge transport and sluggish oxygen evolution reaction (OER) kinetics. Herein, we demonstrate spinel oxide NiCo2O4 (NCO) acted as both photothermal material and oxygen evolution cocatalyst could significantly promote the PEC performance of TiO2 photoanodes, and a high photocurrent of 2.34 mA cm-2 at 1.23 V vs. reversible hydrogen electrode has been achieved by NCO/TiO2 photoanodes assisted by photothermal effect. Importantly, a mechanism is proposed to explain the enhanced bulk charge transport and surface OER activity by an integrated various operando characterizations and density functional theory (DFT) study. Intensity modulated photocurrent spectroscopy (IMPS) analysis and DFT calculations imply the relatively high temperature induced by photothermal effect could accelerate small polaron hopping in the bulk of TiO2, which is verified by the electron diffusion coefficient variation of TiO2 with oxygen vacancies at different temperature. Operando cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) reveal that photothermal conversion facilitates the oxidation of Ni2+ at lower potential and promotes the adsorption of *OH and deprotonation of *OOH intermediates. This work provides deep insight into the photothermal-enhanced PEC performance by observing the bulk small polaron hopping and surface dynamic evolution during the PEC process, which may underpin future advances in promoting PEC and photocatalytic performances of small-polaron-type semiconductors. © 2022, The Authors. All rights reserved.

关键词： Charge transfer

Synergistic Effect of Pore Confinement and Catalysis for Ultra-Stable Potassium-Selenium Batteries

学校读者我要写书评

暂无评论

SSRN 2025年

作者： Liang, Shuaitong Li, Yuenan Miao, Junping Liu, Shuoshuo Han, Pengju Li, Xiang Shao, Weili He, Jianxin Xu, Zhiwei International Joint Laboratory of New Textile Materials and Textiles of Henan Province Zhongyuan University of Technology Zhengzhou450007 China State Key Laboratory of Separation Membranes and Membrane Processes School of Textiles Science and Engineering Tiangong University Tianjin300387 China

Porous carbon fiber substrates play a pivotal role in enhancing the performance of potassium-selenium (K-Se) battery, as they are key to efficiently confining small Se molecules and regulating selenide reactions. Herein, to address the issues of volumetric expansion and polyselenide formation caused by disordered Se aggregation, a three-dimensional composite material of microporous carbon nanofibers coated with Se and Fe was synthesized, effectively suppressing the shuttle effect of liquid-phase polyselenides. state-of-the-art analytical techniques and theoretical modeling were employed to elucidate the deposition dynamics of Se molecules within micropores and the mitigation mechanisms for volumetric expansion effects. The pore-confinement effect optimizes the spatial distribution of Se, while Fe catalyzed the K2Sex, effectively mitigating the sluggish reaction kinetics associated with K2Sex formation. This study offers a theoretical framework and experimental insights to advance the development of K-Se battery with high energy density and superior cycling stability. © 2025, The Authors. All rights reserved.

关键词： Micropores

核壳结构LaOCl/LaFeO_(3)纳米纤维的阻抗匹配设计及其电磁吸波性能研究

学校读者我要写书评

暂无评论

Science China materials 2023年第4期66卷 1587-1596页

作者：邢岩范艺存严智凯赵彪黄语嘉潘伟 School of Science Nanjing University of Posts&TelecommunicationsNanjing 210023China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China School of Microelectronics Fudan UniversityShanghai 200433China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000China State Key Laboratory of New Ceramic and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

电磁波在无线通信等领域的广泛应用导致了严重的电磁污染,迫切需要研发高性能电磁波吸收材料.本文针对吸波材料阻抗不匹配等关键问题,设计并成功制备了新型核壳LaOCl/LaFeO_(3)纳米纤维电磁波吸收剂.这种独特的一维多级结构由导电LaFeO_... 详细信息

电磁波在无线通信等领域的广泛应用导致了严重的电磁污染,迫切需要研发高性能电磁波吸收材料.本文针对吸波材料阻抗不匹配等关键问题,设计并成功制备了新型核壳LaOCl/LaFeO_(3)纳米纤维电磁波吸收剂.这种独特的一维多级结构由导电LaFeO_(3)磁性壳层和离子化合物LaOCl核层组成.基于介电-磁损耗耦合和阻抗匹配的协同作用,LaOCl/LaFeO_(3)纳米纤维在超低负载条件下(4 w t%),表现出-40.1 d B(2.0 mm)的反射损耗和6.4 GHz(2.4 mm)的有效吸收带宽.该工作提出了一种新型LaOCl/LaFeO_(3)纳米纤维吸波材料,并为阻抗匹配调控和电磁吸波性能优化开辟了新策略.

关键词：阻抗不匹配无线通信反射损耗阻抗匹配离子化合物吸波材料电磁污染负载条件

Incorporating Iron Species into Silicalite-1 Framework Through Iminodisuccinate Ligand to Achieve Superior Catalytic Performance in Propane Dehydrogenation

学校读者我要写书评

暂无评论

Renewables 2025年第2期3卷 87-98页

作者： Haoran Sun Yuyang Han Ziyang Liu Xingwang Zhang Pingping Wu Peng Bai Peng Peng Zifeng Yan State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of PetroleumQingdao 266580 Interdisciplinary Institute of NMR and Molecular Sciences Hubei Provincial Laboratory for Coal Conversion and New Carbon MaterialsSchool of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081

Iron-based catalysts possess the advantages of cost-effectiveness and environmental benignity,showing promising prospects for propane dehydrogenation(PDH)*** this work,with the assistance of the iminodisuccinate(IDS)ligand,Fe species are successfully incorporated into the silicalite-1 zeolite framework through one-pot synthesis,and the thus obtained IDS-S_(1)catalyst shows excellent catalytic performance in PDH,which exhibits a propane conversion rate of 20.8%and a propylene selectivity of 84.8%,and it also shows exceptional catalytic stability(kd=0.003 h^(-1))over 48 h of continuous *** indicate that the framework iron species,instead of extraframework iron species and Brønsted acid sites,are the favorable active centers for *** framework iron species are stabilized by the Si-O structure of the zeolite and possess unique acidic properties,which improve the PDH performance of the catalyst by enhancing propane adsorption activation and facilitating propylene desorption.

关键词： propane dehydrogenation framework iron silicalite-1 zeolite catalyst propane adsorption propylene desorption

One-Pot Eutectic Molten Salt Synthesis of Mxene-Supported Nanoscale Zero-Valent Iron Composites for Efficient Adsorption and Reduction of Uranium

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Tu, HaoWei Wu, YanZe Li, ZiJie Zhang, PengCheng Wei, Cuilian Yuan, LiYong Wang, NanNan Wang, Lin Shi, WeiQun 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 Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China

The environmental remediation potential of nanoscale zero-valent iron (nZVI) is generally hindered by severe particle agglomeration or poor stability. A straightforward approach to overcome these challenges is to uniformly and firmly disperse nZVI onto high surface area substrates such as two-dimensional materials. Herein, we propose a novel method for one-pot synthesis of MXene-nZVI composites based on the eutectic molten salt (MS) etching of MAX phase materials. The utilization of ferrous ions with high redox potential in chloride MS enables efficient removal of weakly bonded Al atoms from MAX phases, leading to the formation of MXenes and concomitant in situ reduction of Fe2+ to nZVI on MXene surface. Batch adsorption experiments showed that the effective synergy between nano-lamellar MXene and nZVI played a pivotal role in boosting U(VI) elimination performance of the composites. The optimized MS-MXene-nZVI could rapidly and completely eliminate 291 mg/L U(VI) at an adsorbent dosage of 0.2 g/L, and the maximum removal capacity reached 1750 mg/g. Further environmental application assessment indicated an excellent potential of MS-MXene-nZVI for U(VI) sequestration from complex acid mine drainage. advanced spectroscopic analyses provided clear evidence of the conversion of Fe0 to structural Fe2+ during the reaction and established that the removal mechanism of U(VI) was primarily reductive immobilization, concomitantly with surface chemisorption and hydrolysis precipitation. This study offers new insights into the green and facile preparation of MXene-based nZVI composites via MS strategy, as well as their environmental remediation application in the highly efficient separation of radionuclides and other contaminants. © 2024, The Authors. All rights reserved.

关键词： Spectroscopic analysis

Copper-based nanocatalysts toward chemoselective hydrogenation reaction

学校读者我要写书评

暂无评论

cMat 2024年第1期1卷 1-9页

作者： Hui Guo Ling-Jun Pei Shao-Lei Xie Meng-Qi Shen Yong Yang Hu Liu Key Laboratory of Green and High-End Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXiningChina School of Chemistry and Chemical Engineering Xi'an University of Architecture and TechnologyXi'anChina Lenfest Center for Sustainable Energy Columbia UniversityNew YorkNew YorkUSA State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi'anShaanxiChina

Cu-based catalysts are widely used in various heterogeneous catalytic reaction systems,the precise control of their electronic structure is an intrinsic require-ment for the rational design of metal catalysts,and it is also an important basis for clarifying their structure-activity *** the electronic structure of Cu-based catalysts is an important way to improve the catalytic hydrogenation performance of Cu-based catalysts by controlling the adsorption intensity be-tween the reaction adsorbate and the active *** this paper,the application of selective hydrogenation of Cu-based catalysts is reviewed,with a special emphasis on the selective catalytic hydrogenation reduction of p-nitrostyrene and CO_(2).This review particularly emphasizes the application of Cu-based catalysts in the field of selective hydrogenation and discusses the influence of their different properties on selective hydrogenation performance.

关键词： copper nanocatalysts nitro compounds selective hydrogenation

Corrosion Products Regulation of Pretreated Zero-Valent Iron by Aluminum Chloride for Enhanced Chromium (Vi) Removal and Longevity Under Aerobic Conditions

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Long, Xuejun Li, Rui Wan, Jun Zhong, Zhenxing Ye, Yuxuan Yang, Jiazhi Luo, Jun Xiao, Zhonghua Xia, Jin Liu, Yaomeng School of Environmental Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Engineering Research Center of Ministry of Education for Clean Production of Textile Dyeing and Printing Wuhan Textile University Wuhan430200 China Jiangsu Huashui Water Engineering Co. Ltd Nanjing210009 China Hubei Industrial Construction Group Co. Ltd Wuhan430076 China

The zero-valent iron (ZVI)-based material has been applied for hexavalent chromium (Cr(VI)) decontamination in wastewater treatment and groundwater remediation, but the passivation problem limited their field application. Currently, it is still a challenge to improve ZVI’s longevity and reactivity cost-effectively. In this study, we combined dissolved oxygen and aluminum chloride to regulate the corrosion products of pretreated ZVI (pcZVI-AlCl3) for enhancing its longevity and Cr(VI) removal behavior under aerobic conditions. The optimal pre-corrosion conditions were found to be 2.5 g/L ZVI, 0.5 mM AlCl3, and a 4-hour preconditioning period. Different kinds of techniques were applied to detect the properties of pre-conditioned ZVI and corrosion products. The 57Fe Mössbauer spectra showed proportions of ZVI, Fe3O4, and FeOOH in pcZVI-AlCl3 were 49.22%, 34.03% and 16.76%, respectively. Both Al3+ and Cl− contributed to iron corrosion, and the formation of Al(OH)3 in the corrosion products remarkably improved its pHpzc (point of zero charge), favoring Cr(VI) adsorption. Continuous-flow experiments showed it maintained an effluent concentration of less than 0.1 mg/L for over 1400 BV, indicating its great potential for Cr(VI) removal in field applications. The ZVI and corrosion products showed a synergistic effect in enhancing electron transfer for Cr(VI) removal. The acidic environment was beneficial to Cr(VI) removal by pcZVI-AlCl3, and it performed effectively in a high hardness condition. The mechanisms underlying Cr(VI) removal by pcZVI-AlCl3 included adsorption, reduction and precipitation. This work provides a new strategy on ZVI pre-corrosion for improving its longevity, and insights into corrosion products regulation for enhancing Cr(VI) removal. © 2024, The Authors. All rights reserved.

关键词： Magnetite

Electron-phonon coupling in lattice engineering of lithium niobate single crystal thin films

学校读者我要写书评

暂无评论

arXiv

arXiv 2025年

作者： Shi, Guoqiang Chen, Kunfeng Hu, Hui Tang, Gongbin Xue, Dongfeng Multiscale Crystal Materials Research Center Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China Institute of Novel Semiconductors State Key Laboratory of Crystal Materials Shandong University Jinan250100 China School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan250100 China Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen518060 China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen518110 China

Lithium niobate (LN) single crystal thin films are a high-performance photonic platform with applications in electro-optic modulators, nonlinear optical devices, optical frequency combs, and acousto-optic modulators. LN’s significance in photonics parallels silicon’s in electronics, addressing challenges like high power consumption and slow communication speeds, and offering potential for broad applications in optical communications, quantum computing, and artificial intelligence. Despite progress in developing LN-based photonic structures, achieving low-loss, reconfigurable, and large-scale devices requires improved processing techniques. This work introduces a quantum design methodology based on LN’s crystal structure, utilizing electron-phonon coupling through external field perturbations. Multiscale structural analysis is performed with techniques such as time-of-flight secondary ion mass spectrometry, aberration-corrected transmission electron microscopy, and X-ray absorption spectra to identify and control defect structures. Angle-resolved Raman spectroscopy, femtosecond transient absorption spectroscopy, and Density Functional Theory further reveal the mechanisms of electron-phonon coupling. These findings establish a framework for designing LN-based quantum devices with enhanced performance and diverse functionalities. Copyright © 2025, The Authors. All rights reserved.

关键词： Quantum computers