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Your search keyword '"Wang, Donghua"' showing total 6 results
Start Over Author "Wang, Donghua" Publication Year Range Last 50 years Publisher iop publishing
6 results on '"Wang, Donghua"'

2. Highly efficient photocatalytic overall water splitting in two-dimensional van der Waals MoS2/Hf2CO2 heterostructure.

Author

Hao, Jiamao, Wu, Jun, Wang, Donghua, Wang, Chengdeng, Luo, Mengqin, Xie, Lijuan, Zhu, Fang, Yan, Xiaoqin, and Gu, Yousong

Subjects
TIME-dependent density functional theory, ELECTRON-hole recombination, BAND gaps, MOLECULAR dynamics, HETEROJUNCTIONS, LIGHT absorption
Abstract

Two-dimensional (2D) van der Waals (vdW) heterostructures have attracted much attention due to their unique properties in photocatalysis, electronics, and energy storage. This work comprehensively analyzed the electronic properties and photocatalytic efficiency properties of 2D vdW MoS2/Hf2CO2 heterostructure by first-principles calculations and molecular dynamics simulation. An ideal band gap of 1.44 eV was found for visible light absorption. Meanwhile, a high solar-to-hydrogen efficiency of 17.14% is obtained from the calculated band-edge positions, and a high power conversion efficiency of 13.84% is also confirmed by spectroscopy limited maximum efficiency simulation. We estimate the time scale for electron–hole transfer and recombination times using a combination of non-adiabatic molecular dynamics and time-dependent density functional theory. A suitable e-h recombination time of 1.86 ns and electron (hole) transfer time of 331 (978) fs are obtained in the 2D MoS2/Hf2CO2 heterostructure, which is expected to ensure high photocatalytic efficiency. Therefore, the constructed MoS2/Hf2CO2 heterostructures provide a new example for the prediction of high-performance nano optoelectronic devices. [ABSTRACT FROM AUTHOR]

Published
2023
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3. Highly efficient photocatalytic overall water splitting in two-dimensional van der Waals MoS2/Hf2CO2 heterostructure.

Author

Hao, Jiamao, Wu, Jun, Wang, Donghua, Wang, Chengdeng, Luo, Mengqin, Xie, Lijuan, Zhu, Fang, Yan, Xiaoqin, and Gu, Yousong

Subjects
TIME-dependent density functional theory, ELECTRON-hole recombination, BAND gaps, MOLECULAR dynamics, HETEROJUNCTIONS, LIGHT absorption
Abstract

Two-dimensional (2D) van der Waals (vdW) heterostructures have attracted much attention due to their unique properties in photocatalysis, electronics, and energy storage. This work comprehensively analyzed the electronic properties and photocatalytic efficiency properties of 2D vdW MoS2/Hf2CO2 heterostructure by first-principles calculations and molecular dynamics simulation. An ideal band gap of 1.44 eV was found for visible light absorption. Meanwhile, a high solar-to-hydrogen efficiency of 17.14% is obtained from the calculated band-edge positions, and a high power conversion efficiency of 13.84% is also confirmed by spectroscopy limited maximum efficiency simulation. We estimate the time scale for electron–hole transfer and recombination times using a combination of non-adiabatic molecular dynamics and time-dependent density functional theory. A suitable e-h recombination time of 1.86 ns and electron (hole) transfer time of 331 (978) fs are obtained in the 2D MoS2/Hf2CO2 heterostructure, which is expected to ensure high photocatalytic efficiency. Therefore, the constructed MoS2/Hf2CO2 heterostructures provide a new example for the prediction of high-performance nano optoelectronic devices. [ABSTRACT FROM AUTHOR]

Published
2022
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4. The Research Status and Hotspots in the Domain of Smart Education from 2003-2019

Author

Yu Nanning, Wang Haibin, Guan Yuanyuan, Shi Yuyan, Wu Jinfei, Hu Rui, and Wang Donghua

Subjects
History, Computer science, Data mining, computer.software_genre, computer, Computer Science Applications, Education, Domain (software engineering)
Abstract

To explore the status and hotspots in the domain of smart education, 183 related articles form the Web of Science (WOS) were analyzed by the visualization software CiteSpace. The results show that: (1) the area of smart education stared in 2003 while there was no research in the next six years. There was an upward trend year by year form 2011 and the number of articles reached the historical peak in 2016. Bakken, Lee and Shi, China and Smart Innovation Systems and Technologies topped the lists of contributing authors, country and publication respectively. (2) “engineering education”, “smart city”, “pedagogical affordance”, “ICT” and “big data” were the top five largest clusters on the area of smart education from 2003-2019.

Published
2020

5. The Status and Hotspots of Smart Learning: Base on the Bibliometric Analysis and Knowledge Mapping

Author

Zhang Qingqing, Yu Nanning, Wang Haibin, Wang Li, Wang Xiaoyan, Wang Donghua, and Li Dandan

Subjects
History, Bibliometric analysis, Computer science, Smart learning, Base (topology), Data science, Computer Science Applications, Education
Abstract

To reveal the status and hotspots on the area of smart learning, 303 related articles form the Web of Science (WOS) were analyzed by the visualization software CiteSpace. The results showed that: (1) the area of smart learning stared in 2002 and shows an upward trend year by year form 2010, and the number of articles reached the historical peak in 2016. Kinshuk, China and Lecture Notes in Educational Technology topped the lists of contributing authors, country and publication respectively. (2) “smart learning”, “smart learning ecosystem”, “learning analytics”, “embedded intelligence”, “mobile devices” and “smart-learning” are the top six largest clusters in the domain of smart learning.

Published
2020

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