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Phase Transitions in Mixed-Dimensional Perovskite: From Film Formation Evolution to its Impact on Optoelectronic Properties

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SSRN 2024年

作者： Xiang, Jin Wang, Fei Liang, Xiao Duan, Dawei Yuan, Mingjian Wu, Tom Hu, Hanlin Shi, Yumeng International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics Shenzhen University Shenzhen518060 China Hoffmann Institute of Advanced Materials Shenzhen Polytechnic University Shenzhen518055 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China College of Chemistry and Chemical Engineering Jishou University Hunan Jishou416000 China College of Chemistry Nankai University Tianjin300071 China Department of Applied Physics The Hong Kong Polytechnic University Kowloon999077 Hong Kong Key Laboratory of Luminescence and Optical Information Ministry of Education School of Physical Science and Engineering Beijing Jiaotong University Beijing100044 China

The integration of 2D/3D mixed-dimensional structures in perovskite solar cells (PSCs) has been demonstrated to substantially improve both their photovoltaic performance and device stability. However, the detailed formation mechanism of these mixed-dimensional perovskite phases remains largely unexplored. In this study, we investigate the in-depth formation evolution of mixed-dimensional perovskite phases using the pre-adding method under both one-step and two-step processing condition, where the HTAB ligand molecule is introduced into the perovskite precursor solution beforehand. In the two-step sequential deposition method, 2D perovskite phases formed sequentially via 2D-α/β/γ (upon the assistance of IPA solvent) → 2D-7.6° (upon thermal annealing) → 2D-7.3° (upon thermal annealing). Conversely, in the one-step method, a distinct progression is noted: 2D-7.6° (HTAB ligand react with intermediate phase) → 2D-7.3°. The 2D-α/β/γ phases exhibit extremely thin, belt-like crystals that cover the 3D perovskite surface, the 2D-7.6° phase trends to envelop the 3D perovskite grains without clear crystal morphology, while the 2D-7.3° phase forms distinct platelet-shaped crystals interspersed among the 3D perovskite grains. Leveraging the defect passivation properties of those mixed-dimensional perovskite phases, as well as improved film morphology and crystallinity adjusted by HTAB ligand, an external electroluminescence quantum efficiency (EQELED) of 13.5% is achieved in PSCs with a non-radiative voltage loss of just 52 mV, promoting the power conversion efficiency to 24.54%. This work offers the significant insights into the phase-transition of mixed-dimensional perovskite and their impact on the optoelectronic properties. © 2024, The Authors. All rights reserved.

关键词： Perovskite

Thickness Dependence of Structural and Optical Properties of Chromium Thin Films as an Infrared Reflector for Solar-thermal Conversion Applications

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Journal of Wuhan University of technology(materials Science) 2019年第6期34卷 1239-1247页

作者： LI Qingyu GONG Dianqing CHENG Xudong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

The thermal emittance of Cr film, as an IR reflector, was investigated for the use in SSAC. The Cr thin films with different thicknesses were deposited on silicon wafers, optical quartz and stainless steel substrates by cathodic arc ion plating technology as a metallic IR reflector layer in SSAC. The thickness of Cr thin films was optimized to achieve the minimum thermal emittance. The effects of structural, microstructural, optical, surface and cross-sectional morphological properties of Cr thin films were investigated on the emittance. An optimal thickness about 450 nm of the Cr thin film for the lowest total thermal emittance of 0.05 was obtained. The experimental results suggested that the Cr metallic thin film with optimal thickness could be used as an effective infrared reflector for the development of SSAC structure.

关键词： thermal emittance chromium thin film solar selective absorbing coating cathodic arc ion plating

Weaving 3D highly conductive hierarchically interconnected nanoporous web by threading MOF crystals onto multi walled carbon nanotubes for high performance Li-Se battery

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能源化学 2021年第8期59卷 396-404页

作者： Chao Li Yingying Wang Hongyan Li Jing Liu Jianping Song Luca Fusaro Zhi-Yi Hu Yanxin Chen Yu Li Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) University of Namur B-5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Institute of Microscale Optoelectronics College of Physics and Optoelectronic Engineering Collaborative Innovation Centre for Optoelectronic Science & Technology Shenzhen University Shenzhen 518060 Guangdong China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur B-5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China Namur Institute of Structured Matter (NISM) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Laboratory of Inorganic Materials Chemistry (CMI) University of Namur B-5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China

Lithium-selenium (Li-Se) battery has attracted growing ***,its practical application is still impeded by the shuttle effect of the formed ***,we report in-situ hydrothermal weaving the three-dimensional (3D) highly conductive hierarchically interconnected nanoporous web by threading microporous metal organic framework MIL-68(Al) crystals onto multi-walled carbon nanotubes (MWCNTs).Such 3D hierarchically nanoporous web (3D MIL-68 (Al)@MWCNTs web) with a very high surface area,a large amount of micropores,electrical conductivity and elasticity strongly traps the soluble polyselenides during the electrochemical reaction and significantly facilitates lithium ion diffusion and electron *** dynamic calculation confirmed the strong affinity of MIL-68 (Al) for the adsorption of polyselenides,quite suitable for Li-Se *** hexahedral channels (1.56 nm) are more efficient for the confinement of polyselenides and for the diffusion of electrolytes compared to their smaller triangular channels (0.63 nm).All these excellent characteristics of 3D MIL-68 (Al)@MWCNTs web with suitable confinement of a large amount of selenium and the conductive linkage between MIL-68(Al) host by MWCNTs result in a high capacity of 453 mAh/g at 0.2C with 99.5％ coulombic efficiency after 200 cycles with significantly improved cycle stability and rate *** 3D MIL-68 (Al)@MWCNTs web presents a good performance in Li-Se battery in term of the specific capacity and cycling stability and also in terms of rate performance compared with all the metal-organic framework (MOF) based or MOF derived porous carbons used in Li-Se battery.

关键词： Lithium selenium battery Selenium confinement 3D hierarchically nanoporous web Metal–organic framework (MOF) Multi walled carbon nanotubes

Interfacial Sulfur-Sensitization of PtNi Nanoalloy for Efficient Electrocatalytic Hydrogen Production in Alkaline Simulated Seawater

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Chemistry of materials 2023年第20期35卷 8529-8539页

作者： Fei Yu Yu-Xuan Xiao Jiang-Bo Chen Ge Tian Xiong Yang Fu-Fei Pu Jin-Yi Ouyang Kenneth I. Ozoemena Mark D. Symes Roberto M. Torresi Fazhou Wang Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai 519082 China Molecular Sciences Institute School of Chemistry University of the Witwatersrand Johannesburg 2050 South Africa WestCHEM School of Chemistry University of Glasgow Glasgow G12 8QQ United Kingdom Departamento de Química Fundamental Instituto de Química Universidade de São Paulo Av. Lineu Prestes 748 São Paulo 05508000 Brazil

Optimization of the electronic structure and surface physicochemical properties of PtNi nanoalloys by incorporation of sulfur (S) is an effective strategy for improving the efficiency of the electrocatalytic hydrogen evolution reaction (HER). However, few studies have been carried out to assess the seawater electrocatalytic performance of PtNi by incorporation of interfacial S from CdS nanocrystals. In this study, a simple method is developed to prepare CdS/PtNi, composed of a PtNi alloy supported with CdS quantum dots (QDs). Experimental data demonstrate that interfacial S-sensitization enhances the electron density of PtNi nanoalloy in CdS/PtNi. Therefore, CdS/PtNi exhibits superior performance toward HER in seawater. Specifically, CdS/PtNi displays a low overpotential of 22 mV at a current density of 10 mA cm–2, a higher specific activity of 24.7 mA cm–2at −0.07 V, and superior durability in seawater, all of which metrics exceed those of commercial Pt/C. Theoretical calculations provide additional evidence that interfacial S-sensitization of PtNi alloy raises electron densities, lowers the d-band center, facilitates water molecule adsorption, resistances to Cl–, and reduces the hydrogen adsorption Gibbs free energy of PtNi alloy. This study provides new opportunities for the design of efficient and stable electrocatalysts for large-scale production of hydrogen from seawater.

关键词： Alloys Cadmium sulfide Evolution reactions Platinum Seawater

Efficient Promotion of Cr(Vi) Removal Over Bi2s3 Nanostructure Assisted with Cupric Ions: Potential Applications in Electroplating Wastewater and Contaminated Groundwater

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SSRN 2022年

作者： Tao, Xiong Chen, Fengxi Li, Jun Liu, Yun-Ling Hu, Xiaowu Chen, Rong State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan430205 China Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450002 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Jilin130012 China

Emerging Bi2S3 -based nanotechnology has great potential in Cr(VI)-contaminated wastewater treatment. In this work, it was found for the first time that Bi2S3 nanostructure (BS-D) prepared from dual sulfur sources of L-cysteine and ammonium sulfide efficiently promoted Cr(VI) removal with excellent selectivity for simultaneous removal of Cr(VI) and Cu2+ from aqueous solutions containing various co-existing ions (including Na+, K+, Ca2+, Zn2+, Ni2+, Cd2+, NO3-, SO42- and Cl- ) at pH > 3, preferably at pH = 4.5. Besides, BS-D exhibited stable performance for the co-removal of Cr(VI) and Cu2+ in five recycling tests. Kinetic and thermodynamic studies indicated that the adsorption of Cr(VI) or Cu2+ by BS-D was a spontaneous endothermic process and conformed to pseudo-second-order kinetic model. The adsorbed Cr(VI) ions were partially reduced to Cr(III), which were leached into the solution at pH ≤ 3, inhibiting the adsorption of Cu2+ on BS-D and its promotional effect on Cr(VI) removal by BS-D. The mutual promotional effects of Cu2+ and Cr(VI) could be attributed to electrostatic attraction between HCrO4- and Cu2+ and smaller pH variation of Cr(VI)-Cu2+ mixed solution during their co-removal by BS-D. Finally, potential applications of BS-D were demonstrated by co-removal of Cr(VI) and Cu2+ from two real water matrixes (electroplating wastewater and contaminated groundwater). This work provided a promising BS-D adsorbent for Cr(VI)-contaminated wastewater treatment, and shed insight on the influence of Cu2+ on the Cr(VI) removal by BS-D. © 2022, The Authors. All rights reserved.

关键词： Adsorption

Exploring Cu0–Cu+ Sites for Enhancing Non-Enzymatic Photoelectrochemical Glucose Sensing Performance

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SSRN 2023年

作者： Ren, Xiaohui Xu, Feicui Chen, Rongsheng Ma, Feng Shi, Li Liu, Huating Ren, Long Zhang, Hua Ni, Hongwei Xie, Zhongjian The State Key Laboratory of Refractories and Metallurgy Faculty of Materials Wuhan University of Science and Technology Wuhan430081 China Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics Collaborative Innovation Center for Optoelectronic Science and Technology Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province Shenzhen University Shenzhen518060 China Institute of Advanced Materials and Nanotechnology School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan430081 China School of Materials Science and Chemical Engineering Ningbo University Zhejiang Ningbo315211 China School of Electrical and Electronic Engineering Wuhan Polytechnic University Wuhan430023 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Institute of Pediatrics Shenzhen Children's Hospital Shenzhen518038 China

Photoelectrochemical (PEC) sensing platforms demonstrate outstanding performances towards enzyme-free glucose detection, and exploring glucose reactive electrodes with efficient active sites and enhanced carrier transport/separation behavior would be beneficial for PEC glucose detection. Herein, we fabricated two-dimensional Cu3(PO4)2 nanosheets as the photoactive material for glucose detection. The morphology and structural characterizations prove the existence of balanced Cu0–Cu+ active sites which has been regarded as the key factor on improving PEC performance for fast glucose detection. The photoelectric current of Cu3(PO4)2 nanosheets peeled from Cu3(PO4)2 bulk is three times that of 0 µM at 50 µM, and the response performance is increased by ~9 times compared to Cu3(PO4)2 bulk. Under light conditions, the limit of detection (LOD) as low as 17.68 µM at low concentrations of 20-100 µM, and LOD of 131.69 µM at high concentrations of 100-1000 µM can be achieved. This work might provide the basic understanding and new opportunities in applying two-dimensional Cu3(PO4)2 nanosheets for glucose detection. © 2023, The Authors. All rights reserved.

关键词： Copper compounds

Robust MOF-253-derived N-doped carbon confinement of Pt single nanocrystal electrocatalysts for oxygen evolution reaction

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Chinese Journal of Catalysis 2020年第5期41卷 839-846页

作者： Hellen Gabriela Rivera Monestel Ibrahim Saana Amiinu Andrés Alvarado González Zonghua Pu BibiMaryam Mousavi Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070HubeiChina

Although carbon-supported platinum(Pt/C) is still considered the most active electrocatalyst for hydrogen evolution reaction(HER) and oxygen reduction reaction(ORR), its applications in metal–air batteries as a cathode catalyst, or for oxygen generation via water splitting electrolysis as an anode catalyst is mainly constrained by the insufficient kinetic activity and stability in the oxygen evolution reaction(OER). Here, MOF-253-derived nitrogen-doped carbon(N/C)-confined Pt single nanocrystals(Pt@N/C) have been synthesized and shown to be efficient catalysts for the OER. Even with low Pt mass loading of 6.1 wt%(Pt@N/C-10), the catalyst exhibits greatly improved activity and long-time stability as an efficient OER catalyst. Such high catalytic performance is attributed to the core-shell structure relationship, in which the active N-doped-C shell not only provides a protective shield to avoid rapid Pt nanocrystal oxidation at high potentials and inhibits the Pt migration and agglomeration, but also improves the conductivity and charge transfer kinetics.

关键词： Pt MOF-253 Carbon confinement Oxygen evolution reaction Electrocatalyst

The Effect of Increasing Water on the Physicochemical Features of Thymol: Dl-Menthol

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SSRN 2024年

作者： Garmroodi, Mahshad Vakili Sardroodi, Jaber Jahanbin Jahanbin, Jaber Jahanbakhsh Bonab, Parisa Verport, Francis Azarbaijan Shahid Madani University Iran Department of Chemistry Faculty of Basic Sciences Azarbaijan Shahid Madani University Tabriz Iran Azarbaijan Shahid Madani University Tabriz Iran State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China 6 Miklukho-Maklaya Str. Moscow117198 Russia National Research Tomsk Polytechnic University Lenin Avenue 30 Tomsk634050 Russia

Expanding uses of ionic liquids and their analogs, specifically Deep Eutectic Solvents (DES), necessitate an examination of the impact of moisture content on their physicochemical features. Although these liquids are typically synthesized in moisture-controlled environments to mitigate the influence of moisture on their properties, precise studies on this topic are lacking. In this study, we investigated the influences of water on a Type-V DES made of dl-menthol and thymol in a 1:1 ratio. We conducted tests to ascertain the physical features, including the density of the DES solution. We viewed linear modifications in density with increasing water content;however, the alteration in density was ***, molecular dynamics simulations were applied to examine the intermolecular interactions of DES and solutions of DES. The simulations highlighted the importance of dl-menthol-thymol interactions in explaining the DESs that have low melting points. In the attendance of water, the DES components are hydrated. Furthermore, the simulations helped categorize the influences of water into various systems. At little water content, DLM-DLM and Thy-Thy interactions are increased, as exposed by hydrogen bond examination. The DES6 (80% water), DES constituents are separately hydrated and exhibit varied diffusivity, mirrored in changes in haulage features. The outcomes represented in this study supply useful intelligence on aqueous solutions of DES, both in experimental information and molecular sights. We hope these findings could aid in developing further applications for this DES and related DES. © 2024, The Authors. All rights reserved.

关键词： Hydrogen bonds

Two-dimensional MOF/MOF derivative arrays on nickel foam as efficient bifunctional coupled oxygen electrodes

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Chinese Journal of Catalysis 2020年第11期41卷 1754-1760页

作者： Kai Huang Shuai Guo Ruyue Wang Sen Lin Naveed Hussain Hehe Wei Bohan Deng Yuanzheng Long Ming Lei Haolin Tang Hui Wu State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Oxygen electrocatalysis,exemplified by the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),is central to energy storage and conversion technologies such as fuel cells,metal-air batteries,and water ***,highly effective and inexpensive earth-abundant materials are sought after to replace the noble metal-based electrocatalysts currently in ***,metal-organic frameworks(MOFs)and carbon-based MOF derivatives have attracted considerable attention as efficient catalysts due to their exceedingly tunable morphologies,structures,compositions,and ***,we report two-dimensional(2D)MOF/MOF derivative coupled arrays on nickel foam as binder-free bifunctional ORR/OER catalysts with enhanced electrocatalytic activity and *** remarkable electrochemical properties are primarily attributed to fully exposed active sites and facilitated charge-transfer *** coupled and hierarchical nanosheet arrays produced via our growth-pyrolysis-regrowth strategy offer promise in the development of highly active electrodes for energy-related electrochemical devices.

关键词： 2DMOFs Derivative Coupled arrays Binder-free Oxygen electrode