Novel heterojunction photocatalysts based on lanthanum titanate nanosheets and indium oxide nanoparticles with enhanced photocatalytic hydrogen production activity

作者：Hu Sujuan; Chi Bo^*; Pu Jian; Jian Li

来源：Journal of Materials Chemistry A, 2014, 2(45): 19260-19267.

DOI：10.1039/c4ta04177a

A lanthanumtitanate (La2Ti2O7) and indium oxide (In2O3) heterojunction nanocomposite is synthesized by a solvothermal method. The crystal phase, morphology, optical absorption activity and chemical composition of the In2O3/La2Ti2O7 heterojunction nanocomposites are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-vis diffuse reflectance spectra and X-ray photoelectron spectroscopy. The results reveal that the In2O3 nanoparticles are uniformly dispersed on the surface of the La2Ti2O7 nanosheets with good adhesion. The In2O3/La2Ti2O7 nanocomposite with a molar ratio of 1.5 : 1 exhibits the highest H-2 production rate when used in photocatalytic water splitting, improved by 29.62 and 6.43 times relative to pure In2O3 and La2Ti2O7, respectively. The enhanced photocatalytic H-2 production rate can be ascribed to the formation of the heterojunction structure, which results from the homogeneous dispersion of In2O3 nanoparticles on La2Ti2O7 nanosheets. The configuration of the In2O3/La2Ti2O7 heterojunction nanocomposite photocatalyst can promote the fast separation of photogenerated carriers in space and improve the rate of water-splitting to form H-2.

• 出版日期2014
• 单位华中科技大学