Ag/AgBr‐Grafted Graphite‐like Carbon Nitride with Enhanced Plasmonic Photocatalytic Activity under Visible Light
Ag/AgBr‐Grafted Graphite‐like Carbon Nitride with Enhanced Plasmonic Photocatalytic Activity under Visible Light
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DOI：
10.1002/cctc.201300144
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发表时间：
2013-08
期刊：
影响因子：
4.5
通讯作者：
Yang‐Sen Xu;Wei‐De Zhang
中科院分区：
文献类型：
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作者：
Yang‐Sen Xu;Wei‐De Zhang
采用沉积-沉淀法制备了AgBr/g-C3 N4杂化材料，通过原位光还原制备了Ag/AgBr接枝类石墨碳氮化物（g-C3 N4）。由于Ag纳米晶体的表面等离子体共振吸收，Ag/AgBr/g-C3 N4杂化物在可见光和近红外区域表现出强吸收。与裸g-C3 N4和Ag/AgBr纳米颗粒相比，在可见光照射下，观察到Ag/AgBr/g-C3 N4杂化物对罗丹明B的降解速率分别提高了28倍和6倍。光催化活性的极大增强归因于Ag/AgBr/g-C3 N4三元体系在可见光区的扩展吸收、有效的电荷分离和协同增强。此外，该复合材料可以很容易地通过沉降回收，而不会降低其光催化活性。这项研究为制备高效稳定的g-C3 N4基等离子体光催化剂提供了新的见解，并促进了其在解决环境问题方面的实际应用。
Ag/AgBr‐grafted graphite‐like carbon nitride (g‐C3N4) is fabricated by the in situ photoreduction of AgBr/g‐C3N4 hybrids prepared by a deposition–precipitation method. The Ag/AgBr/g‐C3N4 hybrids exhibit a strong absorbance in the visible and near‐IR region because of the surface plasmon resonance absorption of Ag nanocrystals. Compared with bare g‐C3N4 and Ag/AgBr nanoparticles, a 28‐fold and six‐fold enhancement in the degradation rate of rhodamine B is observed over Ag/AgBr/g‐C3N4 hybrids under visible‐light irradiation, respectively. The immense enhancement of the photocatalytic activity is attributed to the extended absorption in the visible‐light region, effective charge separation, and synergistic enhancement in the ternary Ag/AgBr/g‐C3N4 system. Moreover, the composite can be reclaimed easily by sedimentation without any decrease of its photocatalytic activity. This study provides new insight into the fabrication of highly efficient and stable g‐C3N4‐based plasmonic photocatalysts and facilitates their practical application to solve environmental issues.