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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

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Copper-based nanocatalysts toward chemoselective hydrogenation reaction

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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

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

SSRN

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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

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The issues on the commercialization of perovskite solar cells

Materials Futures

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materials Futures 2024年第2期3卷 1-35页

作者： Lixiu Zhang Yousheng Wang Xiangchuan Meng Jia Zhang Pengfei Wu Min Wang Fengren Cao Chunhao Chen Zhaokui Wang Fu Yang Xiaodong Li Yu Zou Xi Jin Yan Jiang Hengyue Li Yucheng Liu Tongle Bu Buyi Yan Yaowen Li Junfeng Fang Lixin Xiao Junliang Yang Fuzhi Huang Shengzhong Liu Jizhong Yao Liangsheng Liao Liang Li Fei Zhang Yiqiang Zhan Yiwang Chen Yaohua Mai Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632People’s Republic of China Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031People’s Republic of China School of Information Science and Technology Fudan UniversityShanghai 200433People’s Republic of China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072People’s Republic of China School of Physical Science and Technology Soochow UniversitySuzhou 215006People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Institute of optoelectronics Fudan UniversityShanghai 200433People’s Republic of China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123People’s Republic of China School of Physics and Electronic Science East China Normal UniversityShanghai 200241People’s Republic of China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Department of PhysicsPeking UniversityBeijing 100871People’s Republic of China College of Biophotonics South China Normal UniversityGuangzhou 510631People’s Republic of China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Physics and Electronics Central South UniversityChangsha 410083People’s Republic of China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Microquanta semiconductor Hangzhou 311121People’s Republic of China

Perovskite solar cells have aroused a worldwide research upsurge in recent years due to their soaring photovoltaic performance,ease of solution processing,and low *** power conversion efficiency record is constantly being broken and has recently reached 26.1%in the lab,which is comparable to the established photovoltaic technologies such as crystalline silicon,copper indium gallium selenide and cadmium telluride(CdTe)solar ***,perovskite solar cells are standing at the entrance of industrialization,where huge opportunities and risks ***,towards commercialization,challenges of up-scaling,stability and lead toxicity still remain,the proper handling of which could potentially lead to the widespread adoption of perovskite solar cells as a low-cost and efficient source of renewable *** review gives a holistic analysis of the path towards commercialization for perovskite solar cells.A comprehensive overview of the current state-of-the-art level for perovskite solar cells and modules will be introduced first,with respect to the module efficiency,stability and current status of *** will then discuss the challenges that get in the way of commercialization and the corresponding strategies to address them,involving the upscaling,the stability and the lead toxicity *** into the future direction of commercialization of perovskite photovoltaics was also provided,including the flexible perovskite cells and modules and perovskite indoor ***,the future perspectives towards commercialization are put forward.

关键词： commercializations perovskite solar cells state-of-the-art level challenges and perspectives indoor photovoltaics

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High-dielectric-constant nanograin BaTiO_(3)-based ceramics for ultra-thin layer multilayer ceramic capacitors via grain grading engineering

Advanced Powder Materials

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advanced Powder materials 2022年第3期1卷 63-69页

作者： Chaoqiong Zhu Ziming Cai Xiuhua Cao Zhenxiao Fu Longtu Li Xiaohui Wang State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Advanced Materials and Electronic Components Guangdong Fenghua Advanced Technology Holding Co.LtdZhaoqingGuangdong 526000China

Four BT-based ceramic samples were prepared using a grain grading *** bigger-grained(~100 nm)and smaller-grained(~70 nm)BaTiO_(3)(BT)powders were *** smaller-grained BT powder controlled the average grain size and guaranteed the reliability,while the bigger-grained powder enhanced the dielectric *** percentages of bigger-grained BT powder were introduced to balance the average grain size and the dielectric *** the proportion of bigger grains increased,the dielectric constant(εr)improved *** room-temperatureεr of 25%bigger-grain mixed BT(2623)was~50%higher than that of the sample with a similar average grain size without grain *** ceramic mixed with 15%bigger-grained BT showed comprehensive dielectric performance,which met the EIA X5R standard and provided a considerableεr of 1841 along with a low dielectric loss of 0.78%.Notably,the average grain size was 90 nm,which favors the applications in ultra-thin multilayer ceramic capacitors.

关键词： Grain grading engineering Nanograin BaTiO_(3) Dielectric constant Reliability Multilayer ceramic capacitors

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Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

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Nano-Micro Letters 2020年第4期12卷 1-13页

作者： Feitian Ran Xueqing Xu Duo Pan Yuyan Liu Yongping Bai Lu Shao MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and Environment(SKLUWRE)School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People’s Republic of China

The controllable construction of two-dimensional(2D)metal–organic framework(MOF)nanosheets with favorable electrochemical performances is greatly challenging for energy ***,we design an in situ induced growth strategy to construct the ultrathin carboxylated carbon nanotubes(C-CNTs)interpenetrated nickel MOF(Ni-MOF/C-CNTs)*** deliberate thickness and specific surface area of novel 2D hybrid nanosheets can be effectively tuned via finely controlling C-CNTs *** to the unique microstructure,the integrated 2D hybrid nanosheets are endowed with plentiful electroactive sites to promote the electrochemical performances *** prepared Ni-MOF/C-CNTs nanosheets exhibit superior specific capacity of 680 C g^−1 at 1 A g^−1 and good capacity *** assembled hybrid device demonstrated the maximum energy density of 44.4 Wh kg^−1 at a power density of 440 W kg^−*** novel strategy to construct ultrathin 2D MOF with unique properties can be extended to synthesize various MOF-based functional materials for diverse applications.

关键词： Metal–organic frameworks Carbon nanotubes Ultrathin 2D nanosheets Hybrid supercapacitor

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Decorating Aramid Fibers with Chemically-Bonded Amorphous Tio2 for Improving Uv Resistance in the Simulated Extreme Environment

SSRN

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SSRN 2022年

作者： Chen, Fengxiang Zhai, Lisha Huang, Zhiyu Luo, Yuxin Yang, Huiyu Xing, Tonghe He, Annan Yu, Zhenwei Liu, Jie Zhang, Xiaofang Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Beijing Advanced Innovation Center for Biomedical Engineering Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beihang University Beijing100191 China State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao University Qingdao266071 China

Aramid fiber holds a great potential application in harsh environments like defense and aerospace due to outstanding integrated properties, but it still falls short in poor UV resistance and surface inertness. It is an intriguing but challenging task to obtain high anti-UV efficiency for aramid fiber without compromising the mechanical characteristics. Herein, a uniform and thickness-controlled amorphous TiO 2 coating layer is chemically-bonded onto aramid fiber surfaces via a modified atomic layer deposition (mALD) strategy. In contrast to bare aramid fiber with poor UV resistance and greatly suppressed mechanical performance, the modified aramid fibers with 1000 ALD cycles possesses well-preserved mechanical strength and flexibility. Moreover, they exhibit 54.08% retention of initial tenacity even exposure to UV irradiation with intensity of 4260 W/m 2 at high temperature ( > 200 °C) for 360 min (equals to continuous exposure to strong sunlight irradiation for about 7.5 years), simultaneously retain the excellent laundering durability and lustrousness, demonstrating a significant enhancement in anti-UV efficiency. Such highly anti-UV fibers fabricated by a facile mALD strategy provide a new perspective on designing multifunctional fibers and devices for future innovative applications. © 2022, The Authors. All rights reserved.

关键词： Aramid fibers

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Ni-Mof Decorated Carbon Nanotubes Encapsulated Ni Nanoparticles for Robust C-N and H-O Bonds Cleavage

SSRN

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SSRN 2023年

作者： Xie, Yuhua Xiong, Tiantian Li, Chen Shi, Han Zhou, Cong Luo, Fang Li, Chunsheng Sun, Yan Yang, Zehui Sustainable Energy Laboratory Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 388 Lumo RD Wuhan430074 China College of Materials Science and Engineering State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan Textile University Wuhan430200 China School of Chemistry and Life Sciences Suzhou University of Science and Technology Jiangsu Province Suzhou City215009 China Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China Suzhou University of Science and Technology Jiangsu Province Suzhou City215009 China Zhejiang Institute China University of Geosciences Hangzhou311305 China

In this work, we report a robust bifunctional electrocatalyst composed of Ni-MOF and nitrogen doped carbon nanotubes encapsulated Ni nanoparticles (Ni-MOF@Ni-NCNT) for C-N and H-O bonds dissociation. Due to the presence of Ni-NCNT, adsorption of OH- species is enhanced and CO2 binding strength is simultaneously weakened leading to a boosted urea oxidation reaction performance reflected by decrement in potential at 100 mA cm-2 by 69 mV. The loosened binding strength with CO2 specie is highlighted by in-situ electrochemical impedance spectroscopy (EIS) test and DFT calculation. Moreover, the alkaline hydrogen evolution reaction (HER) performance of Ni-MOF@Ni-NCNT is better than Ni-MOF and Ni-NCNT evidenced by the overpotential at 50 mA cm-2 decreased by 224 mV and 900 mV ascribed to the synergistic effect, in which Ni-MOF, Ni nanoparticles and Ni-Nx-C facilitates water adsorption, dissociation and adsorption/combination of hydrogen ions, respectively. The assembled HER-UOR system requires only 1.33 V to reach 10 mA cm-2, 70 mV lower than water splitting driven by Pt/C-IrO2. © 2023, The Authors. All rights reserved.

关键词： Urea

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Solvent Volume Expansion Inhibition During Freeze Casting and its Application in Composite Solid Lithium Electrolytes

SSRN

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SSRN 2023年

作者： Gong, Ming Liang, Ying Li, keyang Guo, Chuangjie Zhao, Xiaohuan Liang, Jie Huang, Yilun Zhao, Ming Dong, Yanhao Ren, Yaoyu Zhuang, Daming Nan, Ce-Wen Gong, Qianming School of Materials Science and Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China State Key Laboratory of New Ceramics and Fine Processing Beijing100084 China School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing100081 China SINOPEC Beijing Research Institute of Chemical Industry Beijing100013 China

Composite solid electrolytes hold the promise to enable all-solid-state lithium-ion batteries to be practicable. One critical issue is the construction of uniform porous ceramic framework. The work proposed an innovative freeze casting-based technology to construct porous ceramic framework of Li1+xAlxGe2−x(PO4)3 (LAGP), which was further composited with polymeric electrolytes to assemble full cells. The pore structure of the ceramic framework was effectively tuned by the ratio of mixed water-ethanol solvents, which could offset the volume expansion of water during freeze casting, benefit powder compact and sintering, and thus improved the quality of the composite solid electrolytes. The unique solvent composition design strategy provided ample opportunity for microstructural modification and the suppression of short-circuiting lithium dendrites, as demonstrated by the improvement of critical current density and phase field modeling. This work offers new perspectives on creating different pore structure free of residual stress or volume expansion once freeze casting technique is adopted. © 2023, The Authors. All rights reserved.

关键词： Pore structure

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Phase Compositions and Crystal Structure of Sn-Deficient Ca2Sn2Al2O9 Microwave Dielectric Ceramics with High Q×F Values

SSRN

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SSRN 2022年

作者： Du, Kang Yin, Chang-Zhi Zhu, Wei Zhou, Cai Zhang, Bo-Han Wang, Ting-Ting Wang, Sheng-Xiang Lei, Wen School of Mathematical and Physical Sciences Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China of MOE Huazhong University of Science and Technology Wuhan430074 China Wenzhou Advanced Manufacturing Institute Huazhong University of Science and Technology Wenzhou325035 China

The phase compositions and microwave dielectric properties of Sn-deficient Ca2Sn2Al2O9 ceramics in this study were explored via crystal structure refinement, far-infrared reflectance spectral and microwave dielectric tests. The crystal structure of the Ca2Sn2Al2O9 was confirmed via transmission electron microscopy. The CaSnO3 and SnO2 second phases existed at Ca2Sn2-xAl2O9-2x (x = 0) ceramic. Single-phase Ca2Sn2Al2O9 ceramics were obtained at 0.08 ≤ x ≤ 0.1, and the orthorhombic structure with the Pbcn space group of Ca2Sn2Al2O9 was verified. For multi-phase Ca2Sn2-xAl2O9-2x (0 ≤ x ≤ 0.06) ceramics, their microwave dielectric properties were mainly affected by second phase contents, and their Q×f values increased gradually with the rise in x. High Q×f (105,700 GHz at 12.99 GHz) was obtained by the Ca2Sn2-xAl2O9-2x (x = 0.08) ceramic with high intrinsic Q×f (175,000 GHz). The large deviation between measured Q×f values and fitted intrinsic Q×f values could be ascribed to the Sn4+ vacancies of the Sn-deficient Ca2Sn2Al2O9 ceramics. The Ca2Sn2-xAl2O9-2x (0 ≤ x ≤ 0.1) ceramics presented large negative τf values, and this τf was mainly affected by τΕ. Meanwhile, the Ca2Sn2-xAl2O9-2x (x = 0.08) ceramic achieved optimal microwave dielectric properties (Εr = 8.31, Q×f = 105,700 GHz at 12.99 GHz and τf = ‒63.7 ppm/°C), indicating the good feature of this material for millimetre-wave applications. © 2022, The Authors. All rights reserved.

关键词： Aluminum compounds

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