In Situ Ion Exchange Synthesis of Strongly Coupled Ag@AgCl/g-C3N4 Porous Nanosheets as Plasmonic Photocatalyst for Highly Efficient Visible-Light Photocatalysis
In Situ Ion Exchange Synthesis of Strongly Coupled Ag@AgCl/g-C3N4 Porous Nanosheets as Plasmonic Photocatalyst for Highly Efficient Visible-Light Photocatalysis
复制标题
原位离子交换合成强耦合 Ag@AgCl/g-C3N4 多孔纳米片作为等离子体光催化剂用于高效可见光光催化
DOI：
10.1021/am505528c
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发表时间：
2014-12-24
影响因子：
9.5
通讯作者：
Xu, Jinzhang
中科院分区：
文献类型：
--
作者：
Zhang, Shouwei;Li, Jiaxing;Xu, Jinzhang
以剥离的二维多孔g-C3N4纳米片与硝酸银为原料，通过合理的原位离子交换方法合成了新型高效的Ag@AgCl/g-C3N4等离子体光催化剂。所制备的Ag@AgCl9/g-C3N4等离子体光催化剂在可见光照射下对罗丹明B的降解表现出良好的光催化性能，其反应速率常数为0.1954 m in(-1)，分别比g-C3N4(类似于0.0047 m in(-1))和Ag/AgC l(类似于0.0116 m in(-1))高16.8倍。对亚甲基蓝、甲基橙和无色苯酚的降解进一步证实了Ag@AgCl9/g-C3N4的广谱光催化降解能力。这些结果表明，适当尺寸的等离子体Ag@AgCl与剥离的多孔g-C3N4纳米片之间的强耦合效应和合适尺寸的等离子体Ag@AgCl的协同效应相结合，对于可见光响应和快速分离光生电子-空穴对具有更好的优势，从而显著提高光催化效率。本工作为合理设计稳定高效的g-C3N4基等离子体光催化剂提供了新的思路。
A novel efficient Ag@AgCl/g-C3N4 plasmonic photocatalyst was synthesized by a rational in situ ion exchange approach between exfoliated g-C3N4 nanosheets with porous 2D morphology and AgNO3. The as-prepared Ag@AgCl-9/g-C3N4 plasmonic photocatalyst exhibited excellent photocatalytic performance under visible light irradiation for rhodamine B degradation with a rate constant of 0.1954 min(-1), which is similar to 41.6 and similar to 16.8 times higher than those of the g-C3N4 (similar to 0.0047 min(-1)) and Ag/AgCl (similar to 0.0116 min(-1)), respectively. The degradation of methylene blue, methyl orange, and colorless phenol further confirmed the broad spectrum photocatalytic degradation abilities of Ag@AgCl-9/g-C3N4. These results suggested that an integration of the synergetic effect of suitable size plasmonic Ag@AgCl and strong coupling effect between the Ag@AgCl nanoparticles and the exfoliated porous g-C3N4 nanosheets was superior for visible-light-responsive and fast separation of photogenerated electron-hole pairs, thus significantly improving the photocatalytic efficiency. This work may provide a novel concept for the rational design of stable and high performance g-C3N4-based plasmonic photocatalysts for unique photochemical reaction.