Citation: Weimeng Cai, Jie Yang, Hongfang Sun, Yibo Wang, Tie Ling, Xuefeng Guo, Luming Peng, Weiping Ding. Surface titanium oxide loaded on a special alumina as high-performance catalyst for reduction of cinnamaldehyde by isopropanol[J]. Chinese Journal of Catalysis, ;2017, 38(8): 1330-1337. shu

Surface titanium oxide loaded on a special alumina as high-performance catalyst for reduction of cinnamaldehyde by isopropanol

Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, Jiangsu, China

Received Date: 29 April 2017
Revised Date: 23 May 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (91434101) and the National Key R&D Plan (2017YFB0702800).

A nanocomposite catalyst with a nonstoichiometric titanium oxide loaded on a special nanotubular alumina (γ-Al₂O₃-nt) was developed and used to reduce cinnamaldehyde to cinnamyl alcohol with sacrificial isopropanol, i.e., a Meerwein-Ponndorf-Verley type reaction. The deposition process produced a highly disperse layer of titanium oxide on the surface of a γ-Al₂O₃-nt support. After a reduction treatment, the as-prepared TiO_x/γ-Al₂O₃-nt was a highly efficient catalyst for the hydrogen transfer reaction between isopropanol and cinnamaldehyde. Selectivity for cinnamic alcohol was higher than 99% and the conversion of cinnamaldehyde was higher than 95%. The regular morphology of the γ-Al₂O₃-nt support with homogeneous surface sites and the uniformly dispersed titanium oxide featured a high concentration surface Ti(Ⅲ) species. These factors contributed to the high performance of the TiO_x/γ-Al₂O₃-nt catalyst.
- Meerwein-Ponndorf-Verley reduction,
- Cinnamaldehyde,
- Nanotubular alumina,
- Regular morphology,
- Ti (III) species
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