High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally ordered macroporous SiO<sub>2</sub> with excellent selectivity in methacrolein oxidation

Heng Zhang; Junqi Liu; Chenyuan Liu; Tingting Wang; Wancheng Zhu

doi:10.1016/j.cjche.2020.07.017

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High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally ordered macroporous SiO₂ with excellent selectivity in methacrolein oxidation

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally ordered macroporous SiO₂ with excellent selectivity in methacrolein oxidation
- Chinese Journal of Chemical Engineering Vol. 28, Issue 11, Pages: 2785-2791(2020)
- Affiliations：
  
  School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu,China,273165
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.07.017
  CLC：
- Published：2020
- Accepted：
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with excellent selectivity in methacrolein oxidation[J]. 中国化学工程学报, 2020, 28(11): 2785-2791.
DOI：

with excellent selectivity in methacrolein oxidation[J]. 中国化学工程学报, 2020, 28(11): 2785-2791. DOI： 10.1016/j.cjche.2020.07.017.

摘要

Abstract

Heteropolyacid nanoparticles (NPs) were supported on Cs-modified three-dimensionally ordered macroporous (3DOM) SiO

and used as the catalyst for the oxidation of methacrolein (MAL) to methacrylic acid (MAA). Hydrothermal treatment and incipient wetness impregnation were employed respectively for the Cs-modification. It was found that hydrothermal Cs-modification of 3DOM SiO

promoted the dispersion of the supported heteropolyacid

which showed an average particle size of 5.2 nm

much smaller than that (17.6 nm) on the Csmodified 3DOM SiO

prepared by incipient wetness impregnation. The effects of hydrothermal treatment on the structure and catalytic performance of the catalyst were investigated. Results showed that the ion exchange between Cs

and the surface silanol groups on 3DOM SiO

was promoted with the increase of the hydrothermal temperature. Meanwhile

Cs-modification helped the heteropolyacid to retain intact Keggin structure

inhibiting the formation of MoO

. Highly dispersed heteropolyacid NPs with enhanced

structural stability exhibited excellent selectivity to MAA in the oxidation of MAL.

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High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally ordered macroporous SiO2 with excellent selectivity in methacrolein oxidation

DOI：10.1016/j.cjche.2020.07.017

摘要

Abstract

关键词

Keywords

references

High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally ordered macroporous SiO₂ with excellent selectivity in methacrolein oxidation