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476 results on '"Zhang, Yongcai"'

23. A study on the correlation between the digital economy and resource allocation efficiency in the context of factor mobility

Author

Zhang Yongcai

Subjects
digital economy, factor mobility, labor factor, capital factor, resource allocation efficiency, 91-10, 91f99, Mathematics, QA1-939
Abstract

In the context of the rapid development of the Internet, the digital economy has become an important growth engine, which has an important impact on the optimization of resource allocation. This paper takes the digital economy for resource allocation efficiency as the research framework and explores the impact mechanism of the digital economy from the perspective of factor flow. After relevant data research, the development capacity of the digital economy has an important positive impact on both capital and labor dimensions in terms of resource allocation, and the digital economy can balance the way of resource allocation in different regions under the perspective of factor mobility. The current analysis of regional heterogeneity shows that the impact of the digital economy in China’s inland regions is higher than that in China’s coastal regions. Based on the above conclusions, this study suggests that it is necessary to further develop digital technology, promote the deepening reform of government policies, regulations, and institutions, and promote the reform of the factor market, to enhance the efficiency enhancement of the digital economy in the allocation of resources.

Published
2024
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43. Outstanding CO2 Photoreduction in Single‐Atom Thulium Modified Carbon Nitride.

Author

Ding, Cheng, Yang, Liuqing, Lu, Xinxin, Chi, Haoqiang, Yang, Yong, Yuan, Junyang, Wang, Xiaoyong, Wu, Xinglong, Zhang, Yongcai, Zhou, Yong, and Zou, Zhigang

Subjects
CHARGE exchange, PHOTOREDUCTION, QUANTUM efficiency, CHARGE transfer, THULIUM
Abstract

CO2 reduction photocatalysts are favorable for obtaining renewable energy. Enriched active sites and effective photogenerated‐carriers separation are keys for improving CO2 photo‐reduction. A thulium (Tm) single atom tailoring strategy introducing carbon vacancies in porous tubular graphitic carbon nitride (g‐C3N4) surpassing the ever‐reported g‐C3N4 based photocatalysts, with 199.47 µmol g−1 h−1 CO yield, 96.8% CO selectivity, 0.84% apparent quantum efficiency and excellent photocatalytic stability, is implemented in this work. Results revealed that in‐plane Tm sites and interlayer‐bridged Tm‐N charge transfer channels significantly enhanced the aggregation/transfer of photogenerated electrons thus promoting CO2 adsorption/activation and contributing to *COOH intermediates formation. Meanwhile, Tm atoms and carbon vacancies both benefit for rich active sites and enhanced photogenerated‐charge separation, thus optimizing reaction pathway and leading to excellent CO2 photo‐reduction. This work not only provides guidelines for CO2 photo‐reduction catalysts design but also offers mechanistic insights into single‐atom based photocatalysts for solar fuel production. [ABSTRACT FROM AUTHOR]

Published
2024
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