BiVO4 quantum tubes loaded on reduced graphene oxide aerogel as efficient photocatalyst for gaseous formaldehyde degradation
BiVO4 quantum tubes loaded on reduced graphene oxide aerogel as efficient photocatalyst for gaseous formaldehyde degradation
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DOI：
10.1016/j.carbon.2018.06.003
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发表时间：
2018-11
期刊：
影响因子：
10.9
通讯作者：
Jianlong Yang;Qiujin Shi;Rui Zhang;Mingzheng Xie;Xiao Jiang;Fangcong Wang;Xiuwen Cheng;W. Han
中科院分区：
文献类型：
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作者：
Jianlong Yang;Qiujin Shi;Rui Zhang;Mingzheng Xie;Xiao Jiang;Fangcong Wang;Xiuwen Cheng;W. Han
为了高效降解气态甲醛，成功制备了BiVO 4（BVO）量子管（QTs），并将其负载于还原氧化石墨烯（rGO）气凝胶上作为复合光催化剂。利用纳米结构BVO的禁带宽度展宽效应，BVO-QTs可以产生氧还原所需的高能光电子。偶联的rGO-气凝胶将作为光生电子的快速转移路径，从而促进分离速率。结果表明，该复合光催化剂具有良好的催化性能，在15 min内可将1.0 ppm的甲醛降解至0.4 ppm。与原始BVO-QT和本体BVO相比，催化活性已显著提高。气凝胶独特的三维结构有利于BVO-QTs的分散和稳定，可方便地重复使用，且性能不受影响。该研究为设计高效的光催化剂去除挥发性有机物提供了一个有用的模型。
For efficient degradation of gaseous formaldehyde, BiVO4(BVO) quantum tubes (QTs) were successfully synthesized and loaded on reduced graphene oxide (rGO) aerogel as a composite photocatalyst. Benefit from the band-gap widening effect in nanostructured BVO, the BVO-QTs can generate energetic photoelectrons required by oxygen reduction. The coupled rGO-aerogel would serve as a fast transfer path for photogenerated electrons, and thus promote the separation rate. Our results show that the composite photocatalyst has a favorable catalytic performance which can degrade formaldehyde from 1.0 ppm to 0.4 ppm in 15 min. The catalytic activity has been significantly improved compared with pristine BVO-QTs and bulk BVO. Moreover, the composite photocatalyst could be reused conveniently with undiminished performance profit from the unique 3D structures of aerogels, which are stable and favorable to the dispersion of BVO-QTs. This work provides a useful model for designing efficient photocatalyst for volatile organic compounds removal.