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Construction of a Novel Z-Scheme Heterojunction with Molecular Grafted Carbon Nitride Nanosheets and V2O5 for Highly Efficient Photocatalysis
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-02-06 , DOI: 10.1021/acs.jpcc.8b11361 Bingqi Liu 1 , Dongguang Yin 1 , Feifei Zhao 1 , Kyu Kyu Khaing 1 , Tao Chen 1 , Chenglong Wu 1 , Linlin Deng 1 , Luqiu Li 1 , Kexian Huang 1 , Yong Zhang 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-02-06 , DOI: 10.1021/acs.jpcc.8b11361 Bingqi Liu 1 , Dongguang Yin 1 , Feifei Zhao 1 , Kyu Kyu Khaing 1 , Tao Chen 1 , Chenglong Wu 1 , Linlin Deng 1 , Luqiu Li 1 , Kexian Huang 1 , Yong Zhang 1
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Molecular grafted carbon nitride (CN) nanosheets coupled with V2O5 to form a novel Z-scheme heterojunction photocatalyst V2O5/CNX (X is 2-aminobenzonitrile) by a facile in situ growth method was acquired. Its photocatalytic properties were investigated by hydrogen evolution and degradation of rhodamine B under simulated sunlight irradiation. It was found that the assembled heterojunction could remarkably enhance photocatalytic activity in contrast to pure CN, V2O5, and previous reported heterojunctions. The great improvement of photocatalytic activity can be attributed to molecular grafting and the formation of the Z-scheme heterojunction, resulting in a remarkable red shift of the optical absorption, a rapid separation of charge carriers, an increase of specific surface area, and introduction of defects. Moreover, exfoliation of bulk CNX into ultrathin nanosheets increases mobility of charges and specific surface area. Different wt % ratios of V2O5-loaded heterojunctions were prepared, and 2% of V2O5-loaded heterojunctions were found to display optimal catalytic efficiency. The possible activity enhanced mechanism was proposed. This work reveals that the molecular grafted V2O5/CNX Z-scheme heterojunction can be utilized for highly efficient photocatalysis applied in energy conversion and environmental remediation.
中文翻译：
分子接枝碳氮化物纳米片和V 2 O 5的新型Z型异质结的高效光催化构建
通过一种简便的原位生长方法，获得了与V 2 O 5偶联的分子接枝的氮化碳（CN）纳米片，形成了新型的Z型异质结光催化剂V 2 O 5 / CNX（X为2-氨基苄腈）。在模拟阳光照射下，通过罗丹明B的析氢和降解研究了其光催化性能。发现与纯CN，V 2 O 5相比，组装的异质结可以显着增强光催化活性。，以及先前报道的异质结。光催化活性的极大提高可归因于分子接枝和Z型异质结的形成，从而导致光吸收显着红移，电荷载流子快速分离，比表面积增加以及引入了缺陷。此外，将大量CNX剥离到超薄纳米片中会增加电荷的迁移率和比表面积。制备了不同的V 2 O 5负载异质结wt％比例，发现2％的V 2 O 5负载异质结表现出最佳的催化效率。提出了可能的活动增强机制。这项工作揭示了分子接枝的V 2O 5 / CNX Z方案异质结可用于在能量转换和环境修复中应用的高效光催化。
更新日期：2019-02-06
中文翻译：
分子接枝碳氮化物纳米片和V 2 O 5的新型Z型异质结的高效光催化构建
通过一种简便的原位生长方法，获得了与V 2 O 5偶联的分子接枝的氮化碳（CN）纳米片，形成了新型的Z型异质结光催化剂V 2 O 5 / CNX（X为2-氨基苄腈）。在模拟阳光照射下，通过罗丹明B的析氢和降解研究了其光催化性能。发现与纯CN，V 2 O 5相比，组装的异质结可以显着增强光催化活性。，以及先前报道的异质结。光催化活性的极大提高可归因于分子接枝和Z型异质结的形成，从而导致光吸收显着红移，电荷载流子快速分离，比表面积增加以及引入了缺陷。此外，将大量CNX剥离到超薄纳米片中会增加电荷的迁移率和比表面积。制备了不同的V 2 O 5负载异质结wt％比例，发现2％的V 2 O 5负载异质结表现出最佳的催化效率。提出了可能的活动增强机制。这项工作揭示了分子接枝的V 2O 5 / CNX Z方案异质结可用于在能量转换和环境修复中应用的高效光催化。
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