Engineering an ultrathin amorphous TiO<sub>2</sub> layer for boosting the weatherability of TiO<sub>2</sub> pigment with high lightening power

Yangyang Yu; Kejing Wu; Shiyu Lu; Kui Ma; Shan Zhong; Hegui Zhang; Yingming Zhu; Jing Guo; Hairong Yue; Changjun Liu; Siyang Tang; Bin Liang

doi:10.1016/j.cjche.2019.04.002

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Engineering an ultrathin amorphous TiO₂ layer for boosting the weatherability of TiO₂ pigment with high lightening power

Materials and Product Engineering | Updated：2026-01-06

- Engineering an ultrathin amorphous TiO₂ layer for boosting the weatherability of TiO₂ pigment with high lightening power
- Chinese Journal of Chemical Engineering Vol. 27, Issue 11, Pages: 2825-2834(2019)
- Affiliations：
  
  1. Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University,Chengdu,China,610065
  2. Institute of New Energy and Low-Carbon Technology, Sichuan University,Chengdu,China,610207
  3. Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University,Chongqing,China,400715
  4. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China,Taiyuan,China,030051
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.04.002
  CLC：
- Published：2019
- Accepted：
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layer for boosting the weatherability of TiO
DOI：

layer for boosting the weatherability of TiO DOI： 10.1016/j.cjche.2019.04.002.

摘要

Abstract

TiO

pigments are typically coated with inert layers to suppress the photocatalytic activity and improve the weatherability. However

the traditional inert layers have a lower refractive index compared to TiO

and therefore reduce the lightening power of TiO

. In the present work

a uniform

amorphous

2.9-nm-thick TiO

protective layer was deposited onto the surface of anatase TiO

pigments according to pulsed chemical vapor deposition at room temperature

with TiCl

as titanium precursor. Amorphous TiO

coating layers exhibited poor photocatalytic activity

leading to a boosted weatherability. Similarly

this coating method is also effective for TiO

coating with amorphous SiO

and SnO

layers. However

the lightening power of amorphous TiO

layer is higher than those of amorphous SiO

and SnO

layers. According to the measurements of photoluminescence lifetime

surface photocurrent density

charge-transfer resistance

and electron spin resonance spectroscopy

it is revealed that the amorphous layer can pr

event the migration of photogenerated electrons and holes onto the surface

decreasing the densities of surface electron and hole

and thereby suppress the photocatalytic activity.

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Engineering an ultrathin amorphous TiO2 layer for boosting the weatherability of TiO2 pigment with high lightening power

DOI：10.1016/j.cjche.2019.04.002

摘要

Abstract

关键词

Keywords

references

Engineering an ultrathin amorphous TiO₂ layer for boosting the weatherability of TiO₂ pigment with high lightening power