JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 328
·期 3
·991-1000
·
IF 1.371
Cai Jialing,Feng Jiahui,Li Jiahui,Feng Yu,Liu Fuping,He Feifang,Yu Haoqi,Zhang Zimin,Hu Yanqin,Hua Rong
This paper characterized the microstructure and physical properties of the scale from a uranium mine in Xinjiang by SEM, XRD and FT-IR. Based on the orthogonal experiment design, the formula of HClO 4 : EDTA: (NaF + HNO 3 ) = 4:1:5 is selected. The results show that the scale remover has the functions of dissolution, lattice damage and dispersion. The selected collaborative scale removal method can effectively remove the scale in the uranium mining process and has certain application value.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yu-Jun Xu,Shuo Zhang,Meng-Ke Zhang,Ting-Ting Mao,Jun Cai,Yan-Xia Chen
Potential of zero free charge (PZFCs) of Pt(111)/0.1 M HClO 4 interface with adsorbed P-block elements X ad ( X = I, Br, Te, Se and S) of various coverages are investigated using electrochemical reduction of peroxodisulfate (PDS) as the probe reaction, aiming at understanding the mechanism of adatom in regulating the PZFCs of Pt(111)@X ad /0.1 M HClO 4 interface. Experimental observations reveal that increase adatom coverage on Pt(111) results in a monotonic positive shift in the PZFCs with S, Se and Br adatoms. The maximum PZFCs with saturated S ad , Se ad and Br ad are in the range of ca. 0.5–0.53 V RHE , which is positively shifted by ca. 0.14–0.17 V comparing to the PZFC of unmodified Pt(111)/0.1 M HClO 4 interface. In contrast, whereas I and Te adatoms lead to a nonmonotonic change of PZFCs with coverage, characterized by an initial positive shift up to ca. 0.51/0.48 V RHE followed by a sharp drop down to ca. 0.17/0.14 V RHE at higher coverages. The origin for such phenomenon can be well rationalized by the displacement of adsorbed water on Pt(111) by X ad , such displacement induced change of electron spillover from the Pt surface as well as the electronic effect of X ad and Pt.
研究领域:
物理化学
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电化学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 38
·13336-13341
·
IF 7.059
Gaoping Xu,Leipeng Zhang,Bo Wang,Zichen Ren,Xi Chen,Shuliang Dou,Feifei Ren,Hang Wei,Xiaobai Li,Yao Li
Flexible polyaniline films doped by H2SO4–HClO4 multiple acids were synthesized, and for the first time, their electrochromic mechanism was studied via optical characterizations from the aspects of polarons and roughness. The electrochromic device based on the doped polyaniline films as the active material exhibits Δε of 0.47 in 8–14 μm and reflectivity higher than 80% in 250–400 nm, which can be integrated with the white snow environment in the UV-vis-infrared spectroscopy due to the sunlight scatter from the abundant micropores. In addition, the device exhibits a superior fast electrochromic behavior and stability of more than 200 cycles without compromising its performance. More importantly, the finite-element method and experimental results demonstrate that the device can achieve thermal management upon flat and twisted configuration. The flexible device shows promise for a broad range of potential applications in optical and thermal regulation systems.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
JingYan Liu,Yan Guo,MengHua Zhu,YuanChao Li,Xin Li
In inverted planar perovskite solar cells (PSCs), fullerene (C 60 ) and its derivatives are widely utilized as electron-transport layer (ETL) materials, however, possess some drawbacks such as low electron mobility , interfacial degradation, and relatively inferior stability. In this work, we develop a facile thermal annealing-free hydrothermal route to synthesize high-crystalline SnO 2 nanocrystals through controlling the crystallization process with HClO 4 . An interlayer of SnO 2 nanocrystals is inserted between C 60 ETL and Ag electrode. The SnO 2 interlayer can not only serve as an ETL to help improve electron extraction and transport but also act as a passivation/barrier layer to prevent oxygen and moisture ingress and ion migration. Based on the p-i-n structure of fluorine-doped tin oxide (FTO)/NiO x /MAPbI 3 /C 60 /SnO 2 /Ag, the power conversion efficiency (PCE) of the champion device is up to 16.36% with almost negligible hysteresis . The unencapsulated inverted PSCs retain more than 80% of its initial PCE value after storage in atmosphere for 90 days (>2100 h), and degrade only about 20% its initial efficiency after 41 h under heating at 85 °C. More important, all the preparation processes are performed under ambient conditions. Our work provides a viable strategy for assembling highly efficient and stable inverted PSCs in the air.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）