Nanostructured Bi2O3@TiO2 photocatalyst for enhanced hydrogen production

作者：Reddy, N. Lakshmana; Emin, S.; Valant, M.; Shankar, M. V.^*

来源：International Journal of Hydrogen Energy, 2017, 42(10): 6627-6636.

DOI：10.1016/j.ijhydene.2016.12.154

• TiO2
• Bi2O3
• Cocatalyst
• Glycerol
• Dehydrogenation
• Hydrogen

Here we report on Bi2O3 clusters immobilized on anatase TiO2 nanostructures for an enhanced rate of photocatalytic H-2 evolution. Structural, morphological, and optical properties of the Bi2O3@TiO2 nanocomposite (BT) were characterized by a series of techniques including X-ray diffraction, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy, diffuse reflectance spectroscopy and electrochemical impedance spectroscopy. The catalytic H-2 evolution experiments were carried out under different light sources: natural solar light, LED UV (365 +/- 5 nm) and LED visible (420 +/- 5 nm) light source. Under the solar light a pristine anatase TiO2 nanostructured (TNS) catalyst generated 4.20 mmol h(-1) g(-1), whereas in the presence of Bi2O3@TNS showed much higher H-2 production 26.02 mmol h(-1) g(-1). The photocatalytic activity of the BT and its reproducible performance for five recycles is ascribed to an efficient separation of photogenerated charge carriers. A plausible reaction mechanism for the H-2 generation is proposed.

• 出版日期2017-3-9
• 单位电子科技大学