Highly-dispersed boron-doped graphene nanosheets loaded with TiO2 nanoparticles for enhancing CO2 photoreduction.
Highly-dispersed boron-doped graphene nanosheets loaded with TiO2 nanoparticles for enhancing CO2 photoreduction.
复制标题
负载二氧化钛纳米粒子的高分散硼掺杂石墨烯纳米片可增强二氧化碳光还原
DOI：
10.1038/srep06341
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发表时间：
2014-09-11
影响因子：
4.6
通讯作者：
Zhang J
中科院分区：
文献类型：
--
作者：
Xing M;Shen F;Qiu B;Zhang J
硼掺杂的石墨烯纳米片（B-GR）作为p型半导体，提供更多的边缘以促进TiO 2纳米颗粒（P25）的负载。采用真空活化法和超声法成功地合成了高度分散的P25/B-GR纳米片，其粒径为20-50 nm。纳米化的形貌可以降低硼替代掺杂引起的缺陷局域密度，使B-GR保持良好的导电性和p型输运特性。在混合过程中形成了Ti-O-C键，可以有效地将电子从TiO 2转移到B-GR，空穴从B-GR转移到TiO 2。B-GR的可调带隙特性决定了P25/B-GR在光还原CO2等气态有机污染物方面的巨大应用潜力。
Boron doped graphene nanosheets (B-GR) as a p-type semiconductor, provides much more edges to facilitate the loading of TiO2 nanoparticles (P25). Highly-dispersed P25/B-GR nanosheets with the size of 20-50 nm, are successfully synthesized by the vacuum activation and ultraphonic method. The nanosized morphology can decrease the local density of defects which are induced by the boron substitutional doping, and make the B-GR keeping excellent conductivity and p-type transport property. Ti-O-C bonds are formed during the mixing process, which could efficiently transfer the electrons from TiO2 to B-GR and the holes from B-GR to TiO2. The tunable bandgap of B-GR determines the large potential application of P25/B-GR in the photoreduction of CO2 and other gaseous organic pollutants.