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Atomic scale g-C3N4/Bi2WO6 2D/2D heterojunction with enhanced photocatalytic degradation of ibuprofen under visible light irradiation

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成果类型:
期刊论文
作者:
Wang, Jiajia;Tang, Lin*;Zeng, Guangming;Deng, Yaocheng;Liu, Yani;Wang, Longlu;Zhou, Yaoyu;Guo, Zhi;Wang, Jingjing;Zhang, Chen
通讯作者:
Tang, Lin
作者机构:
[Wang, Jiajia; Zeng, Guangming; Deng, Yaocheng; Guo, Zhi; Tang, Lin; Wang, Jingjing; Liu, Yani; Zhang, Chen] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Wang, Jiajia; Zeng, Guangming; Deng, Yaocheng; Guo, Zhi; Tang, Lin; Wang, Jingjing; Liu, Yani; Zhang, Chen] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.
[Wang, Longlu] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410082, Hunan, Peoples R China.
通讯机构:
[Tang, Lin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
Atomic scale;2D/2D heterojunction;Monolayer Bi2WO6;Ultrathin g-C3N4 nanosheets;Photocatalysis
期刊:
Applied Catalysis B: Environmental
ISSN:
0926-3373
年:
2017
卷:
209
页码:
285-294
基金类别:
National Natural Science Foundation of China [51579096, 51521006, 51222805, 51679084, 51508175, 51409024]; National Program for Support of Top-Notch Young Professionals of China; 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:
Although photocatalytic degradation is an ideal strategy for cleaning environmental pollution, it remains challenging to construct a highly efficient photocatalytic system by steering the charge flow in a precise manner. In this study, a novel atomic scale g-C3N4/Bi2WO6 heterojunction (UTCB) constructed by ultrathin g-C3N4 nanosheets (ug-CN) and monolayer Bi2WO6 nanosheets (m-BWO) was successfully prepared by hydrothermal reaction. The UTCB heterojunctions were characterized by various techniques including XRD, TEM, AFM, BET measurements, UV–vis spectrometry, and XPS. The results indicated that UTCB heterojunctions were assembly of m-BWO on ug-CN and presented high separation efficiency of photogenerated carriers. Under visible light irradiation, the optimum molar ratio of ug-CN/m-BWO (1:4, UTCB-25) reached almost 96.1% removal efficiency of IBF within 1 h, which was about 2.7 times as that of pure m-BWO. The photocatalytic mechanisms of UTCB-25 were revealed, suggesting that the synergistic effect of UTCB-25 heterojunction with strong interfacial interaction promoted the photoinduced charge separation. According to the LC–MS/MS, five photodegradation pathways of IBF under visible light irradiation were proposed. This study could open new opportunities for the rational design and a better understanding of atomic scale two dimensions/two dimensions (2D/2D) heterojunctions in environmental or other applications.

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