Efficient visible-light photocatalytic hydrogen evolution over platinum supported titanium dioxide nanocomposites coating up-conversion luminescence agent (Er3+:Y3Al5O12/Pt–TiO2). (9th February 2015)

• Record Type: Journal Article
• Authors: Li, Yun; Guo, Yuwei; Li, Shuguang; Li, Ying; Wang, Jun
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 5(2015)
• Page Start: 2132
• Page End: 2140
• Publication Date: 2015-02-09
• Subjects: Up-conversion luminescence agent -- Er3+:Y3Al5O12/Pt–TiO2 nanocomposite -- Visible-light photocatalyst -- Methanol splitting -- Hydrogen evolution; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2014.12.023
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, a novel up-conversion luminescence agent (Er 3+ :Y3 Al5 O12 ) was synthesized by sol-gel method and then for visible-light photocatalytic hydrogen evolution a corresponding visible-light photocatalyst, platinum supported titanium dioxide nanocomposites coating up-conversion luminescence agent (Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposite particles), was successfully prepared by sol-gel and calcination methods. Er 3+ :Y3 Al5 O12, Pt–TiO2 and Er 3+ :Y3 Al5 O12 /Pt–TiO2 were all characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and energy dispersive X-ray spectroscopy (EDX). The visible-light photocatalytic activity of Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposites was examined through photocatalytic hydrogen evolution from methanol splitting under visible-light irradiation. The influence factors such as Er 3+ :Y3 Al5 O12 and Pt–TiO2 mole ratio, heat-treated temperature and heat-treated time on the visible-light photocatalytic hydrogen evolution activity of Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposites were also studied. Particularly, Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposites with 1.5:1.0 M ratio heat-treated at 500 °C for 60 min showed the highest visible-light photocatalytic activity in hydrogen evolution from methanol splitting. Graphical abstract: Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposite particles were successfully prepared by sol-gel and calcination methods. For confirmation, Er 3+ :Y3 Al5 O12, Pt–TiO2 and Er 3+ :Y3 Al5 O12 /Pt–TiO2 were all characterized by XRD, SEM, EDX and TEM. The visible-light photocatalytic activity was examined through photocatalytic hydrogen evolution from methanol splitting under visible light irradiation. The influence of mole ratio, heat-treated temperature and heat-treated time on the visible-light photocatalytic hydrogen evolution activity of Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposite particles were studied. Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposite particles with 1.5:1.0 M ratio heat-treated at 500 °C for 60 min showed the highest photocatalytic activity in hydrogen evolution from methanol splitting. Highlights: A new visible-light photocatalyst (Er 3+ :Y3 Al5 O12 /Pt–TiO2 nanocomposite particles) was prepared. Er 3+ :Y3 Al5 O12 /Pt–TiO2 can effectively perform visible-light photocatalytic H2 production. A visible-light photocatalytic H2 production process of Er 3+ :Y3 Al5 O12 /Pt–TiO2 was presented.