Citation: WANG Ya-Fang, LI Li-Ping, HUANG Xin-Song, LI Guang-She. A New Ti³⁺-assisted Synthesis of Pd-supported TiO₂ Nanomaterial with Enhanced Photocatalytic Activity for Hydrogen Generation and Methyl Orange Degradation[J]. Chinese Journal of Structural Chemistry, ;2015, 34(8): 1203-1216. doi: 10.14102/j.cnki.0254-5861.2011-0669 shu

A New Ti³⁺-assisted Synthesis of Pd-supported TiO₂ Nanomaterial with Enhanced Photocatalytic Activity for Hydrogen Generation and Methyl Orange Degradation

a.
a. School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China;
b.
b. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

Corresponding author: LI Guang-She,
Received Date: 12 February 2015
Available Online: 24 April 2015
Fund Project: Supported by National Natural Science Function of China (No. 91022018, 21025104) (No. 91022018, 21025104)National Basic Research Program of China (No. 2011CBA00501, 2013CB933203) (No. 2011CBA00501, 2013CB933203)

Owing to the merits of high catalytic activity, Pd-supported materials have received extensive attention. However, those materials always require complex and high-cost synthetic processes such as high-temperature calcination or H₂ reduction, which seriously hinder their wide applications. In this work, a novel Pd reduction method was developed for Pd-supported TiO₂ catalysts, in which the Pd²⁺ ions were partly reduced and homogeneously loaded on the surface of 8 nm TiO₂ with the assistance of pre-produced surface Ti³⁺ ions. This facile preparation is calcination-free and cost-low. The excellent catalysts can produce H₂ 33 mmol/g/h under UV-vis light irradiation, and degrade nearly 10% methyl orange in 1 h visible-light irradiation, which is much higher than that of unloaded TiO₂ or Pd/TiO₂ prepared by traditional high-temperature calcination methods. Moreover, the resulting Pd-supported TiO₂ nano-catalysts are also effective for colorless phenol degradation under visible-light. The reasons for these superior activities can be assigned to the co-existence of Pd⁰ and Pd²⁺ on the surface of TiO₂ nanoparticles, which is closely related to the calcination-free synthetic process. UV-Vis absorbance spectra show that the obtained 0.53Pd/TiO₂ is visible-light-driven and nitrogen physisorption isotherms indicate a high specific surface area of 203 m²/g. The preparation method reported herein may provide hints for obtaining other high photocatalytic activity Pd-based supported catalysts for hydrogen generation and methylene orange degradation.
- Pd-supported,
- TiO₂,
- Ti³⁺,
- photocatalysis
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