Huichao He
Southwest University of Science and Technology
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Featured researches published by Huichao He.
Research on Chemical Intermediates | 2018
Wenyuan Hu; Faqin Dong; Jing Zhang; Mingxue Liu; Huichao He; Dingming Yang; Hongquan Deng
A flaky photocatalytic composite of anatase@natural rutile(A@NR) was obtained using one-step microwave hydrothermal synthesis, which was designed to overcome the low photocatalytic efficiency stemming from high electron-hole recombination and a narrow photoresponse range. The characterizations were completely elucidated using X-ray diffraction, field emission scanning electron microscopy, Brunauer Emmett Teller surface area, ultraviolet–visible diffuse reflectance spectroscopy, and photoluminescence spectra. The efficiency of A@NR in photocatalytic degradation of methyl orange was determined to be close to that of P25 under UV light and superior to that of P25 under visible light. The excellent photocatalytic activity results from the synergistic effects of substituting Fe ions, which alter the band structure, and the isomerism of anatase and natural rutile, which separates the photogenerated electron holes. The calculated apparent quantum efficiencies of 32.8 and 12.9% for A@NR, under UV and visible light irradiation, respectively, show a higher catalytic activity and a more effective photoinduced electron-hole separation in A@NR than in P25.
Journal of Materials Chemistry | 2018
Xiaohui Zhong; Huichao He; Minji Yang; Gaili Ke; Zongyan Zhao; Faqin Dong; Bowen Wang; Yaqi Chen; Xianying Shi; Yong Zhou
BiVO4 is a promising photoanode material for photoelectrochemical water splitting, but its actual activity is hindered by the high energy surface states. Here, we report that In3+ can be used as a dopant to substitute the partial sites of Bi3+ in BiVO4 for modifying the surface states and improving the water oxidation activity of a BiVO4 nanoflake film. Among the In3+-doped BiVO4 film photoanodes, the 7% In3+-doped BiVO4 film shows optimal photoelectrochemical water oxidation activity. At 1.23 V vs. RHE, the 7% In3+-doped BiVO4 photoanode exhibits a photocurrent density of 1.56 mA cm−2 in 0.1 M Na2SO4, which is over 200% greater than that of the undoped BiVO4 photoanode. In3+-doping did not change the morphology, phase and band gap of BiVO4 obviously, but resulted in a positive shift of the flat band position and higher surface charge separation efficiency for water oxidation. Density functional theory calculations indicate that the surface energy of BiVO4 decreased after In3+-doping that involved more unsaturated electrons of the Bi atom in the Bi–O bonds, thus reducing the amount of exposed unsaturated Bi atoms and broken Bi–O bonds. Therefore, the enhanced water oxidation activity on the In3+-doped BiVO4 photoanode can be ascribed to In3+-doping that passivated the surface states of BiVO4 and thus inhibited the surface charge recombination.
Green Chemistry | 2018
Huichao He; Jinyan Du; Bo Wu; Xiaohui Duan; Yong Zhou; Gaili Ke; Tingting Huo; Qin Ren; Liang Bian; Faqin Dong
A photoelectrochemical route with a W, Mo co-doped BiVO4 film photoanode was exploited for the first time to drive the coupling reaction of 5-amino-1H-tetrazole at room temperature for clean synthesis of sodium 5,5′-azotetrazolate, a starting material commonly used for the synthesis of all other energetic salts of 5,5′-azotetrazolate. The coupling reaction was initiated with the photo-generated holes of the doped BiVO4 at room temperature with stable faradaic efficiency higher than 80% at 1.2 V vs. RHE.
Journal of Electroanalytical Chemistry | 2016
Guangli Zhang; Ping He; Wanru Feng; Shuangshuang Ding; Jingchao Chen; Lian Li; Huichao He; Susu Zhang; Faqin Dong
Journal of Physics and Chemistry of Solids | 2016
Shuangshuang Ding; Ping He; Wanru Feng; Lian Li; Guangli Zhang; Jingchao Chen; Faqin Dong; Huichao He
Electrochimica Acta | 2017
Huichao He; Yong Zhou; Gaili Ke; Xiaohui Zhong; Minji Yang; Liang Bian; Kangle Lv; Faqin Dong
Physica Status Solidi (a) | 2015
Huichao He; Gaili Ke; Ping He; Jinhu Liang; Faqin Dong
Applied Surface Science | 2018
Wenyuan Hu; Faqin Dong; Jing Zhang; Mingxue Liu; Huichao He; Yadong Wu; Dingming Yang; Hongquan Deng
Journal of Materials Science | 2019
Yaqi Chen; Minji Yang; Jinyan Du; Gaili Ke; Xiaohui Zhong; Yong Zhou; Faqin Dong; Liang Bian; Huichao He
Environmental Science and Pollution Research | 2018
Pingping Wang; Faqin Dong; Mingxue Liu; Huichao He; Tingting Huo; Lei Zhou; Wei Zhang