关键词：
Cu foam;CuxO nanowires;Pd-decorated;Gas sensor;H2S;CeO2-coated
摘要：
Binder-free CeO2 coated/Pd-decorated CuxO nanowires (CuxO/Pd/CeO2_NWs) based on Cu foam were synthe-sized using a four-step process: electrochemical nanoengineering for preparing Cu nanowires, galvanic replacement between Cu nanowires and H2PdCl4, soaking in cerous nitrate solution and followed thermal annealing. Due to the optimized Pd thin layer, followed coating of the moisture-blocking CeO2 overlayer, the binder-free Pd-decorated CuxO nanowires exhibit a prominently enhanced sensing properties to H2S. The CuxO/ Pd/CeO2_NWs sensor exhibits a high response of 36.69 to 50 ppm H2S with rapid response/recovery speed (48.9 s/59.1 s), good selectivity and humidity-independent sensing properties at room temperature. Therefore, this work shows promising potential in detecting H2S and a new insight is opened up in designing binder-free devices based on metal substrate for indoor/outdoor environmental monitoring regardless of humidity fluctuations.
作者机构：
[Qiu, Dan; Huang, Xintang; Li, Xiaohui; Qiu, Huajun; Yang, Ze; Yu, Ying; Zhou, Qiancheng] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Peoples R China.;[Huang, Xintang; Yu, Ying; Zhou, Xing] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China.
通讯机构：
[Ze Yang; Xintang Huang; Ying Yu; Ze Yang Ze Yang Ze Yang; Xintang Huang Xintang Huang Xintang Huang; Ying Yu Ying Yu Ying Yu] I;Institute of Nanoscience and Technology, College of Physical Science and Technology, Central China Normal University, Wuhan, 430079 China
关键词：
core-shell nanostructure;MnO2 nanosheets;N-doped carbon;Zn ion batteries
作者机构：
[Zhu, Qiancheng; Zhang, Wenming; Wang, Xiaoying; Zhang, Yijing; Zhao, Danyang; Lei, Yu] Hebei Univ, Coll Phys Sci & Technol, Natl & Local Joint Engn Lab New Energy Photoelect, Baoding 071002, Peoples R China.;[Huang, Xintang; Zhao, Danyang] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Huang, Xintang] Wuchangshouyi Univ, Dept Basic Sci, Wuhan 430064, Peoples R China.;[Liu, Jinping] Wuhan Univ Technol, Sch Chem Chem Engn & Life Sci, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China.;[Liu, Jinping] Harbin Normal Univ, Sch Phys & Elect Engn, Key Lab Photon & Elect Bandgap Mat, Minist Educ, Harbi 150025, Peoples R China.
通讯机构：
[Wenming Zhang; Qiancheng Zhu; Wenming Zhang Wenming Zhang Wenming Zhang; Qiancheng Zhu Qiancheng Zhu Qiancheng Zhu] N;[Xintang Huang; Xintang Huang Xintang Huang Xintang Huang] I;[Jinping Liu; Jinping Liu Jinping Liu Jinping Liu] S;Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan, 430079 P. R. China<&wdkj&>Department of Basic Sciences, Wuchangshouyi University, Wuhan, 430064 P. R. China<&wdkj&>National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding, 071002 P. R. China<&wdkj&>School of Chemistry, Chemical Engineering and Life Science, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070 P. R. China<&wdkj&>Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education School of Physics and Electronic Engineering, Harbin Normal University, Harbi, 150025 P. R. China
摘要：
Aqueous Zn-ion batteries (AZIBs) are promising due to their high theoretical energy density and intrinsic safety, and the natural abundance of Zn. Since low voltage is an intrinsic shortage of AZIBs, achieving super-high capacity of cathode materials is a vital way to realize high practical energy density, which however remains a huge challenge. Herein, the capacity increase of classical vanadium oxide cathode is predicted via designing atomic thickness of 2D structure to introduce abundant Zn2+ storage sites based on density functional theory (DFT) calculation; then graphene-analogous V2O5 center dot nH(2)O (GAVOH) with only few atomic layers is fabricated, realizing a record capacity of 714 mAh g(-1). Pseudocapacitive effect is unveiled to mainly contribute to the super-high capacity due to the highly exposed GAVOH external surface. In situ Raman and synchrotron X-ray techniques unambiguously uncover the Zn2+ storage mechanism. Carbon nanotubes (CNTs) are further introduced to design GAVOH-CNTs gel ink for large-scale cathode fabrication. The hybrid cathode demonstrates ultra-stable cycling and excellent rate capability and delivers a high energy density of 476 Wh kg(-1) at 76 W kg(-1); 228 Wh kg(-1) is still retained at high mass loading of 10.2 mg cm(-2). This work provides inspiration for breaking the capacity limit of cathode in AZIBs.
期刊：
Sensors and Actuators B-Chemical,2022年358:131520 ISSN：0925-4005
通讯作者：
Xintang Huang
作者机构：
[Huang, Xintang; Li, Xiaohui; Dun, Menghan; Zhao, Danyang; Tang, Meihui] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys Sci & Technol, Wuhan 430079, Peoples R China.
通讯机构：
[Xintang Huang] I;Institute of Nanoscience and Nanotechnology, Department of Physical Science and Technology, Central China Normal University, 430079 Wuhan, PR China
关键词：
H2S gas sensor;Hierarchical CuO microspheres;PdO decorated;Room-temperature;Ultra-fast response/recovery
作者机构：
[Wang, Ling; Wang, Chaoyue; Li, Qin; Shi, Yun; Fang, Yuqiang; Huang, Fuqiang; Yu, Jianding] State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai;200050, China;[Huang, Xintang] College of Physical Science and Technology, Central China Normal University, Wuhan;430079, China;[Katayama, Tsukasa] Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo
通讯机构：
[Tsukasa Katayama] R;[Fuqiang Huang; Jianding Yu] S;[Xintang Huang] C;College of Physical Science and Technology, Central China Normal University , Wuhan 430079, China<&wdkj&>State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science , Shanghai 200050, China<&wdkj&>Research Institute for Electronic Science, Hokkaido University , N20W10, Kita, Sapporo 001-0020, Japan
期刊：
Journal of Colloid and Interface Science,2021年586:47-55 ISSN：0021-9797
通讯作者：
Tan, Wenhu
作者机构：
[Huang, Xintang; Cheng, Yue; Tan, Wenhu; Li, Xin; Zhang, Yunzhuo] Cent China Normal Univ, Dept Phys Sci & Technol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Tan, Wenhu] C;Cent China Normal Univ, Dept Phys Sci & Technol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
关键词：
Cu-supported Ag nanowires;Lattice defection;Silver-zinc batteries;Synergistic effect;Ultrahigh areal capacity
摘要：
As one of the most mature battery systems, the silver-zinc battery holds huge promise in the field of aqueous rechargeable batteries due to superior performance, high safety and environmental friendliness. It is urgent to improve the areal capacity of silver-zinc batteries so far. This study reports a novel Cu-supported Ag Nanowires (Cu@AgNAs1-5: abbreviation of Cu@AgNAs1, Cu@AgNAs2, Cu@AgNAs3, Cu@AgNAs4 and Cu@AgNAs5) as binder-free cathodes for high performance rechargeable aqueous silver-zinc batteries. Cu@AgNAs1-5 are successfully prepared by two steps of electrochemical nanoengineering and mild galvanic replacement between Cu and [Ag(NH3)(2)](+) chelate ions under green solution. With ultrahigh Ag loading of above 81 mg cm(-2), the Cu@AgNAs5 cathode achieves ultrahigh areal capacity of above 36 mAh cm(-2) at current density of 10 mA cm(-2). Benefiting from synergistic effect of Ag and Cu, multiply twinned structure accompanied by lattice defections (such as lattice distortion, mismatch and dislocation) and heterostructures, the Cu@AgNAs1-5 cathodes achieve excellent Ag utilization and cycling stability. Furthermore, the aqueous rechargeable Cu@AgNAs5-Zn battery demonstrates an excellent areal capacity of 36.80 mAh cm(-2) at 10 mA cm(-2). This work offers a promising pathway to greatly enhance areal capacity of bimetallic nanostructure-based electrodes and the Cu@AgNAs1-5-Zn batteries are attractive for large-scale energy-storage application. (C) 2020 Elsevier Inc. All rights reserved.
作者机构：
[Li, Xiu; Chen, Chen; Zhang, Faqiang; Yi, Zhiguo; Fang, Hanliang] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China.;[Li, Xiu; Huang, Xintang] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Li, Xiu] Henan Univ Engn, Henan Key Lab Elect Ceram Mat & Applicat, Zhengzhou 451191, Peoples R China.
通讯机构：
[Xintang Huang] I;[Zhiguo Yi] S;State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China<&wdkj&>Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
摘要：
The coating of silica (SiO2) on quantum dots (QDs) has been widely studied, because SiO2 can protect QDs from the damages of moisture, radiation, and heat. Conventional SiO2 coating methods for QDs are usually performed in aqueous or emulsion solutions, which require the addition of water for the hydrolysis of SiO2 precursors and lead to the photoluminescence (PL) quenching of QDs. To address this issue, a novel SiO2 coating approach on single particle level was developed by the thermally forcing decomposition of tetraethyl orthosilicate in toluene. The CdSe/CdS/ZnS:Al@SiO2 nanoparticles (NPs) were prepared without decreasing the original PL quantum yield (QY), which exhibited much better photo and thermal stability in comparison with uncoated CdSe/CdS/ZnS:Al QDs. Furthermore, due to the natural formation of silanol groups on the SiO2 shell, CdSe/CdS/ZnS:Al@SiO2 NPs present not only good solubility but also excellent room temperature stability in phosphate buffer saline solution for several months. (C) 2019 Elsevier B.V. All rights reserved.
摘要：
The operating voltage of aqueous hybrid capacitors are generally limited to 2 V due to the decomposition of water, which significantly impede the progress of energy density. Herein, the porous low-crystalline FeOx nanorod array on carbon cloth is prepared by the novel electrochemical Li+ pre-insertion method, and a 2.4 V high-voltage aqueous hybrid capacitor device is successfully obtained after matching with the nickel doped (Ni0.25Mn0.75)(3)O-4@PPy nanoprisms array. The low-crystalline structure of FeOx preserved during the first Li+ insertion and space created via the elimination of low-crystalline Li2O dramatically provides sufficient electronic and ionic transfer channels. In addition, surface polypyrrole (PPy) stabilization is employed to further enhance electron conductivity and electrode stabilization. Benefitting from increasing active sites, fast ion diffusion and electron transfer the obtained lowcrystalline FeOx@PPy electrode exhibits improved electrochemical performance, especially for capacitance and stability. Moreover, the aqueous hybrid capacitors (Ni0.2.5Mn0.75)(3)O-4@FFy//FeOx@PPy device delivers a high energy density of 72.4 Wh kg(-1) with the ultra-high voltage, and admirable cycling stability (94.7% retention after 4000 cycles). Our work highlights the novel electrochemical Li+ pre-insertion method to achieve superior low-crystalline electrodes materials and designs the high-voltage aqueous hybrid energy storage devices. (C) 2020 Elsevier B.V. All rights reserved.
