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Your search keyword '"Hu, Yingfei"' showing total 155 results
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155 results on '"Hu, Yingfei"'

3. Analysis of the inspection points of imported prepackaged food labels

Author

ZHENG Xuan, LING Li, PAN Suhua, CHEN Fang, HU Yingfei, DING Xiao, LIU Qing, and LIANG Guihong

Subjects
pre-package food, import, labels, food safety supervision, label inspection, Food processing and manufacture, TP368-456, Nutrition. Foods and food supply, TX341-641
Abstract

Recently， approximately 20% of the products unqualified in the national sampling inspection of imported food have been found through food label inspection， which has become one of the most important inspection methods for imported prepackaged food. In this study， the labels of imported prepackaged food were analyzed to determine the important inspection points， noting that particular attention should be paid to the conformity of products with the entry and registration requirements of the general administration of customs， the use of compliant raw materials， and the standardization of the special labeling content. The results suggest that the quality and efficiency of label inspection should be improved from four aspects： enhancing the awareness and ability to prevent and control unqualified risks， strengthening the training of inspectors’ professional skills， developing an artificial intelligence label verification system， and optimizing the relevant laws and standards to improve the safety of imported prepackaged food.

Published
2024
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25. Enhanced Photoelectrochemical Hydrogen Evolution on CuBi2O4 Photocathode with Silver as Conductive Channels.

Author

Hu, Yingfei, Min, Xinyi, Qi, Yujia, Zhang, Wenyan, Liu, Chao, Wang, Yuanyuan, Guan, Hangmin, and Hao, Lingyun

Subjects
*PHOTOCATHODES, *P-type semiconductors, *SEMICONDUCTOR materials, *HYDROGEN evolution reactions, *HYDROGEN, *SILVER, *HYDROGEN production
Abstract

CuBi2O4 is a promising p-type semiconductor material with a theoretical maximum current density of about 19.7 mA cm‒2. Although CuBi2O4 has a very high theoretical photocurrent, its poor charge transmission efficiency makes its actual photocurrent far less than its theoretical values. Herein, an in situ modification method is adopted to prepare a photocathode material with Ag as conductive channels. A metal–organic coating method is used to introduce Ag conductive channels, promoting the charge transmission between grains. Ag particles play the role of electrical connection, and improve the separation and transmission of carriers, so as to obtain enhanced photocurrent density. In situ formed Ag conductive channels significantly enhanced the PEC performance of CuBi2O4 photocathodes. [ABSTRACT FROM AUTHOR]

Published
2024
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36. Direct photoconversion of CO2 to carbon nanotubes for oxygen recycling in extraterrestrial exploration

Author

Wang, Jun, primary, Wang, Jiajia, additional, Feng, Jianyong, additional, Hu, Yingfei, additional, Huang, Huiting, additional, Zhang, Ningsi, additional, Zhao, Minyue, additional, Liu, Changhao, additional, Zhu, Zhi, additional, Yan, Shicheng, additional, Yu, Tao, additional, Zhang, Ce, additional, Yao, Wei, additional, Li, Zhaosheng, additional, and Zou, Zhigang, additional

Published
2022
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45. Pivotal Role of Chirality in Photoelectrocatalytic (PEC) Water Splitting

Author

Yang Weimin, Hu Yingfei, Hao Lingyun, Guan Hangmin, Zhang Wenyan, Lu Gongxuan, and Liu Fei

Subjects
Computer science, Chemical physics, General Earth and Planetary Sciences, Water splitting, Chirality (chemistry), General Environmental Science
Abstract

For decades, the over-exploitation of fossil fuel has made it urgent to develop alternative energy. Photoelectrochemical (PEC) water splitting is a promising approach to generate hydrogen, which is referred to as the fuel of the future due to its high enthalpy of combustion and zero pollution. Though impressive progress has been made over the years, PEC water splitting efficiency is still far from volume production of hydrogen, and more efforts are required to reduce the overpotential, inhibit the yield of hydrogen peroxide by-product, improve the PEC current density, improve light-harvesting capability, and develop low-cost earth-abundant catalysts. Recently, chirality has shown to play a pivotal role in addressing the issues of PEC water splitting via the effect of chiralinduced spin controlling and chiral-enhanced light harvesting. It is high time to pay attention to the art of chirality in promoting water splitting efficiency. Herein, recent progress in this field is reviewed, the approaches to introducing chirality into photo/electronic catalysts for PEC water splitting are summarized, characterization techniques applied in this research field are summed up, the challenges of chirality-enhanced PEC water splitting are discussed, and based on the present achievements, its bright future is anticipated.

Published
2021

48. In situ surface-trap passivation of CuBi2O4 photocathodes for unbiased solar water splitting.

Author

Hu, Yingfei, Wang, Jun, Huang, Huiting, Feng, Jianyong, Liu, Wangxi, Guan, Hangmin, Hao, Lingyun, Li, Zhaosheng, and Zou, Zhigang

Abstract

Passivating surface traps plays a crucial role in mitigating the efficiency loss of solar water-splitting electrodes. However, the associated surface-trap passivation approaches require the introduction of an overlayer, complicating the fabrication process and increasing the capital cost of photoelectrodes. Herein, using CuBi2O4 as a prototype, an in situ surface-trap passivation strategy is developed, which yields a beneficial 90 mV anodic shift in hydrogen-evolution onset. Detailed mechanism investigations prove that the intentionally added Mg2+ ions in the precursor gradually segregate as MgO and enrich at the grain boundaries/surface of the CuBi2O4 multicrystalline, porous film during annealing, via which surface traps stemming from dangling bonds are spontaneously passivated; measurements of photovoltage generation characteristics and carrier lifetime validate the favorable roles of the MgO passivator in CuBi2O4 photocathodes. A bias-free water-splitting device is assembled using MgO-passivated CuBi2O4 and Mo-doped BiVO4 as the photocathode and photoanode respectively in a tandem configuration, delivering a solar-to-hydrogen conversion efficiency of approximately 0.41%. [ABSTRACT FROM AUTHOR]

Published
2023
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