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Plasmonic Bi Metal Deposition and g-C3N4 Coating on Bi2WO6 Microspheres for Efficient Visible-Light Photocatalysis

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成果类型:
期刊论文
作者:
Wang, Jiajia;Tang, Lin*;Zeng, Guangming*;Liu, Yani;Zhou, Yaoyu;Deng, Yaocheng;Wang, Jingjing;Peng, Bo
通讯作者:
Tang, Lin;Zeng, Guangming
作者机构:
[Wang, Jiajia; Zeng, Guangming; Deng, Yaocheng; Tang, Lin; Wang, Jingjing; Peng, Bo; Liu, Yani; Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, 8 South Lushan Rd, Changsha 410082, Hunan, Peoples R China.
[Wang, Jiajia; Zeng, Guangming; Deng, Yaocheng; Tang, Lin; Wang, Jingjing; Peng, Bo; Liu, Yani; Tang, L; Zeng, GM] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, 8 South Lushan Rd, Changsha 410082, Hunan, Peoples R China.
[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, 1 Agr Univ Rd, Changsha 410128, Hunan, Peoples R China.
通讯机构:
[Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, 8 South Lushan Rd, Changsha 410082, Hunan, Peoples R China.
[Tang, L; Zeng, GM] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, 8 South Lushan Rd, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
plasmonic Bi metal;g-C3N4;Bi2WO6 microspheres;SPR effect;charge separation
期刊:
ACS Sustainable Chemistry and Engineering
ISSN:
2168-0485
年:
2017
卷:
5
期:
1
页码:
1062-1072
基金类别:
National Program for Support of Top-Notch Young Professionals of China; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [51579096, 51222805, 51521006, 51679084, 51508175]; Program for New Century Excellent Talents in University from the Ministry of Education of China [NCET-11-0129]
机构署名:
本校为其他机构
院系归属:
资源环境学院
摘要:
A low-cost semiconductor-based photocatalyst using visible light energy has attracted increasing interest for energy generation and environmental remediation. Herein, plasmonic Bi metal was deposited in situ in g-C<inf>3</inf>N<inf>4</inf>@Bi<inf>2</inf>WO<inf>6</inf>microspheres via a hydrothermal method. As an electron-conduction bridge, metallic Bi was inserted as the interlayer between g-C<inf>3</inf>N<inf>4</inf>and the surface of Bi<inf>2</inf>WO<inf>6</inf>microspheres to enhance visible light absorption due to the surface plasmon resonance (SPR) effect and facilitate efficient electron-carrier separation. Different characterization techniques, including XRD, SEM, TEM, UV-vis, XPS, photoluminescence, and photocurrent generation, were employed to investigate the morphology and optical properties of the as-prepared samples. The results indicated that the g-C<inf>3</inf>N<inf>4</inf>(20%)@Bi@Bi<inf>2</inf>WO<inf>6</inf>microsphere sample exhibited an extraordinary enhanced photocatalytic activity, higher than those of the g-C<inf>3</inf>N<inf>4</inf>, Bi<inf>2</inf>WO<inf>6</inf>, and g-C<inf>3</inf>N<inf>4</inf>(20%)@Bi<inf>2</inf>WO<inf>6</inf>samples. It implies that the heterostructured combination of g-C<inf>3</inf>N<inf>4</inf>, metallic Bi, and Bi<inf>2</inf>WO<inf>6</inf>microspheres provided synergistic photocatalytic activity via an efficient electron transfer process. On the basis of the results, a possible photocatalytic mechanism of the as-prepared samples was proposed. The present study demonstrated the feasibility of utilizing low-cost metallic Bi as a substitute for noble metals to design a doped photocatalysis composite with enhanced photocatalytic performance. &copy;2016 American Chemical Society.

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