Influence of the reduction of graphene oxide (rGO) on the structure and photoactivity of CdS-rGO hybrid systems
Influence of the reduction of graphene oxide (rGO) on the structure and photoactivity of CdS-rGO hybrid systems
复制标题
DOI：
10.1016/j.ijhydene.2016.11.154
复制
发表时间：
2017-05
影响因子：
7.2
通讯作者：
I. M. Leo;E. Soto;F. Vaquero;N. Mota;R. Navarro;J. Fierro
中科院分区：
文献类型：
--
作者：
I. M. Leo;E. Soto;F. Vaquero;N. Mota;R. Navarro;J. Fierro
采用溶剂热法和化学还原法对氧化石墨烯（rGO）进行还原，研究了还原后氧化石墨烯（rGO）的表面组成、断裂和分层程度。HI化学还原可使rGO的还原和堆积程度提高，而溶剂热还原，尤其是N2 H4化学还原可使rGO的脱层程度提高。将不同的rGO并入CdS意味着CdS-rGO杂化物的特性和光活性的变化。在所有CdS-rGO杂化物中观察到促进剂效应，相对于裸CdS的光活性，观察到在其中氧化石墨烯用HI还原的杂化物（CdS-rGO/HI）上的更好的光活性。从CdS的结构、表面和光吸收能力的变化以及CdS与rGO的接触等方面分析了CdS-rGO杂化材料光活性的变化。具有强量子限制的小CdS纳米结构的更大浓度是在CdS-rGO/HI混合物中观察到的光活性增强的起源。
Solvothermal and chemical reduction of graphene oxide with N2H4or HI affect the surface composition, rupture and delamination degree of reduced graphene oxide (rGO). Higher reduction and stacking of rGO was achieved by chemical reduction with HI, while solvothermal reduction and, especially, the chemical reduction with N2H4lead to higher delamination of rGO. The incorporation of the different rGO to CdS implies changes in the characteristics and photoactivity of the CdS-rGO hybrids. A promoter effect was observed in all CdS-rGO hybrids respect to the photoactivity of bare CdS, observing the better photoactivity on the hybrid in which the graphene oxide was reduced with HI (CdS-rGO/HI). The variations in the photoactivity of CdS-rGO hybrids are analyzed in terms of changes in the structure, surface and light absorption ability of CdS and also analyzing the contact of CdS with rGO. The greater concentration of small CdS nanostructures with strong quantum confinement is in the origin of the enhancement in photoactivity observed in the CdS-rGO/HI hybrid.