Au/TiO2-gC3N4 Nanocomposites for Enhanced Photocatalytic H2 Production from Water under Visible Light Irradiation with Very Low Quantities of Sacrificial Agents
Au/TiO2-gC3N4 Nanocomposites for Enhanced Photocatalytic H2 Production from Water under Visible Light Irradiation with Very Low Quantities of Sacrificial Agents
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DOI：
10.1002/aenm.201702142
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发表时间：
2018-05-15
影响因子：
27.8
通讯作者：
Keller, Valerie
中科院分区：
文献类型：
--
作者：
Marchal, Clement;Cottineau, Thomas;Keller, Valerie
本文首次设计和优化了一种三组分Au/TiO2-gC(3)N(4)纳米复合光催化剂，该催化剂能够在可见光照射下使用极少量的牺牲剂从水中高效地产生H-2。与Au/TiO2和Au/gC(3)N(4)材料相比，这种增强的光催化行为是由于三种成分之间高质量的组装和界面协同作用的结果。这种优化的纳米级组装的特点是g-C3N4和TiO2半导体之间同时形成有利的纳米异质结，以及AuNPs/gC(3)N(4)和AuNPs/TiO2结，从而增强了可见光捕获、电荷分离和H-2的产生。该复合光催化剂在可见光照射下产生高的h -2产量(350 μ mol(-1) h(-1) gcatalyst(-1))，牺牲剂(
Here for the first time the design and optimization are presented of a threecomponent Au/TiO2-gC(3)N(4) nanocomposite photocatalyst able to efficiently produce H-2 from water using very low amounts of sacrificial agents and under visible light irradiation. This enhanced photocatalytic behavior compared to Au/TiO2 and Au/gC(3)N(4) materials is the result of synergetic effects due to high quality assembly and interface between the three components. This optimized nanoscale assembly characterized by simultaneous favorable nanoheterojunction formation between g-C3N4 and TiO2 semiconductors, as well as AuNPs/gC(3)N(4) and AuNPs/TiO2 junctions, leads to enhanced visible light harvesting, charge separation, and H-2 production. This composite photocatalyst yields a high H-2 production (350 mu mol(-1) h(-1) gcatalyst(-1)) under visible light irradiation with minimal amounts of sacrificial agent (