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Your search keyword '"Yao, Congfei"' showing total 38 results
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38 results on '"Yao, Congfei"'

25. Non-noble metal Bi/BiVO4 photoanode for surface plasmon resonance-induced photoelectrochemical biosensor of hydrogen peroxide detection.

Author

Chen, Ying, Xin, Yanmei, Yao, Congfei, and Miao, Yuqing

Subjects
HYDROGEN peroxide, SURFACE plasmon resonance, DYE-sensitized solar cells, PRECIOUS metals, SOLAR cells, BIOSENSORS, METALS
Abstract

Non-noble metal for surface plasmon resonance (SPR)-induced nano-enzymatic photoelectrochemical (PEC) biosensors is a promising method for broad applications. Non-noble metal bismuth (Bi) is gradually being valued for their properties such as non-toxicity, abundant reserves, and good catalysis. Meanwhile, metallic Bi nanoparticles (NPs) have superior SPR properties similar to that of noble metal. Therefore, a non-noble metal Bi/BiVO4 photoanode based on SPR was designed for the PEC detection of H2O2 in this work. The synergistic effect of BiVO4 with suitable band gap (2.5 eV) and Bi NPs with superior SPR effectively reduces the recombination of photogenerated electrons and holes, which significantly improves the PEC activity of Bi/BiVO4 electrode at low voltage. The in situ Bi/BiVO4/FTO photoelectrode not only exhibits a more comprehensive linear range of 0.005–2.6 mM with a lower detection limit of 2.0 μM but also possesses excellent selectivity for the determination of H2O2 because the coexisting substances are difficult to be oxidized at 0 V bias voltage. The investigation of Bi/BiVO4-based sensor has contributed to the development of non-noble metal for SPR-induced PEC biosensors. [ABSTRACT FROM AUTHOR]

Published
2022
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29. In2S3/BiOI composites boost visible-light photocatalytic degradation of tetracycline hydrochloride.

Author

Hu, Panbing, Xin, Yanmei, Yao, Congfei, and Miao, Yuqing

Subjects
TETRACYCLINE, TETRACYCLINES, X-ray photoelectron spectra, SUPEROXIDES, TRANSMISSION electron microscopy, X-ray diffraction measurement, SCANNING electron microscopy
Abstract

In2S3/BiOI composites were synthesized at room temperature which significantly improved the photocatalytic degradation of tetracycline hydrochloride (TC) under visible light irradiation. Structure and morphology characterization techniques have been performed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction measurements (XRD) and X-ray photoelectron spectra (XPS). The separation ability of photogenerated carriers is enhanced due to the formation of heterojunctions of the composites. The best performance is obtained when the content of In2S3 is 7 wt%. Compared with In2S3 and BiOI alone, 7-In2S3/BiOI has the highest specific surface area and can provide more active sites. Based on the photo-electrochemical characterization and free radical tests, a photocatalytic mechanism of In2S3/BiOI composites in the presence of superoxide radicals (˙O2−) and holes (h+) is reasonably proposed. [ABSTRACT FROM AUTHOR]

Published
2021
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38. Tetraethylammonium Amino Acid Ionic Liquids and CO2for Separation of Phenols from Oil Mixtures

Author

Ji, Youan, Hou, Yucui, Ren, Shuhang, Yao, Congfei, and Wu, Weize

Abstract

Phenols have wide applications and much commercial value, and they are obtained from oil mixtures by separation. However, the previous separation agents have low separation efficiency or corrosive halide ions or are difficult to be regenerated. In this work, we designed several tetraethylammonium amino acid (TAAA) ionic liquids (ILs) without corrosive halide ions and found that the ILs could separate phenols from oil mixtures with much higher extraction efficiency and could be regenerated using CO2. The effects of separation time, initial phenol content, TAAA type, water content in TAAA, and phenol type on separation were investigated. It has been found that TAAA can separate phenols with high separation efficiencies, and the maximum separation efficiency of phenol can reach up to 99.0% at a TAAA:phenol mole ratio of 0.60. Meanwhile, ultimate phenol contents can reach as low as 1.40 g/dm3. The initial phenol content almost has no influence on the ultimate phenol contents. For real coal tar oil mixtures, the separation efficiency of phenols can reach up to 98.6%. The TAAAs can be regenerated and reused without significant decreases in separation efficiency of phenols. The separation mechanism has also been proposed based on chemical reactions.

Published
2018
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