Preparation and characterization of sulfated TiO<sub>2</sub> with rhodium modification used in esterification reaction and decomposition of methyl orange

Yu Niu; Fuying Li; Kai Yang; Ting Qiu; Renzhang Wang; Cheng Lin

doi:10.1016/j.cjche.2015.12.016

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Preparation and characterization of sulfated TiO₂ with rhodium modification used in esterification reaction and decomposition of methyl orange

第25届中国过程控制会议专栏 | Updated：2026-01-06

- Preparation and characterization of sulfated TiO₂ with rhodium modification used in esterification reaction and decomposition of methyl orange
- Chinese Journal of Chemical Engineering Issue 6, Pages: 767-774(2016)
- Affiliations：
  
  1. School of Chemical Engineering, Fuzhou University,Fuzhou,China,350002
  2. 2 Collaborative Innovation Center of Clean Coal Gasification Technology, Sanming University,Sanming,China,365004
  3. 3 College of Resources and Chemical Engineering, Sanming University,Sanming,China,365004
  4. 4 Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University,Fuzhou,China,350002
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2015.12.016
  CLC：
- Published：2016
- Accepted：
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Yu Niu, Fuying Li, Kai Yang, et al. Preparation and characterization of sulfated TiO₂ with rhodium modification used in esterification reaction and decomposition of methyl orange[J]. Chinese Journal of Chemical Engineering, 2016, (6): 767-774. DOI: 10.1016/j.cjche.2015.12.016.
DOI：

Yu Niu, Fuying Li, Kai Yang, et al. Preparation and characterization of sulfated TiO₂ with rhodium modification used in esterification reaction and decomposition of methyl orange[J]. Chinese Journal of Chemical Engineering, 2016, (6): 767-774. DOI: 10.1016/j.cjche.2015.12.016. DOI：

摘要

Abstract

A unique Rh/TiO

solid acid catalyst modified with H

was synthesized and evaluated in the esterification reaction of propylene glycol methyl ether and decomposition of methyl orange (MO) in aqueous phase under halogen lamp irradiation. For this purpose

rhodium (Rh) nanoparticles were loaded on SO

/TiO

via the photo-deposition method. It was found that SO

/Rh-TiO

exhibited stronger catalytic activity than SO

/TiO

. The new catalysts were characterized by X-ray powder diffraction (XRD)

Brunauer-Emmett-Teller (BET)

Transmission electron microscopy (TEM) and high-resolution (HRTEM)

X-ray photoelectron spectroscopy (XPS) and Fourier Transform infrared spectroscopy (FTIR). Results from XRD and BET show that SO

/Rh-TiO

has higher specific surface area and smaller pore size than SO

/TiO

. The distribution of loaded Rh was found to be uniform with a particle size of 2-4 nm. Data from XPS reveal that Rh primarily exists as Rh

and Rh

in Rh-TiO

and SO

/Rh-TiO

. These valence forms of Rh likely contribute to the enhanced catalytic activity. Furthermore

FT-IR spectra of the catalysts show an abundance of surface hydroxyl groups

which help the formation of hydroxyl radicals and the enhancement of surface acid density. The results show that more acid sites are formed on the sulfated Rh-TiO

and these acidic sites are largely responsible for improving the catalytic performance. This superior SO

/Rh-TiO

catalyst has potential applications in reactions requiring efficient acid catalysts

including esterification reactions and waste water treatment.

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Preparation and characterization of sulfated TiO2 with rhodium modification used in esterification reaction and decomposition of methyl orange

DOI：10.1016/j.cjche.2015.12.016

摘要

Abstract

关键词

Keywords

references

Preparation and characterization of sulfated TiO₂ with rhodium modification used in esterification reaction and decomposition of methyl orange