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Pollutant template method synthesis of oxygen vacancy and template cavity riched TB-TiO2@MFA towards selective photodegradation of ciprofloxacin

2021; Elsevier BV; Volume: 569; Linguagem: Inglês

10.1016/j.apsusc.2021.151027

1873-5584

Ziyang Lu, Yangrui Xu, Yewei Ren, Guosheng Zhou, Huan Yan, Minshan Song, Panpan Wang, Changchang Ma, Song Han, Xinlin Liu,

Advanced Nanomaterials in Catalysis

Oxygen vacancy and template cavity riched TB-TiO 2 @MFA prepared by one-step pollutant template method exhibits excellent selective degradation ability to CIP under visible light irradiation. • TB-TiO 2 @MFA is obtained by one-step pollutant template method. • One-step pollutant template method endows samples with oxygen vacancy and template cavity. • Template cavities are used to enhance the selectivity and the specific surface area. • Oxygen vacancies are formed to improve the visible light catalytic performance. • TB-TiO 2 @MFA has excellent selective degradation ability to CIP. Currently, the lack of visible light response, small specific surface area, and non-selectivity limit the development of TiO 2 . In this paper, the black TiO 2 @MFA with template cavity (TB-TiO 2 @MFA) was synthesized by one-step pollutant template method. The one-step pollutant template method not only endowed the sample with a large number of oxygen vacancies, but also simultaneously endowed the sample with a wealth of template cavities. The existence of oxygen vacancy improved the electron transfer efficiency and visible light absorption ability, the existence of template cavity improved the contact of TB-TiO 2 @MFA with ciprofloxacin (Template pollutant). Hence the existence of oxygen vacancy and template cavity together led to the improvement of the photocatalytic performance of TB-TiO 2 @MFA. The degradation rate of TB-TiO 2 @MFA to ciprofloxacin is 11.5 times that of TiO 2 . More importantly, the template cavity endowed the sample with excellent selective degradation ability, the selectivity coefficient of TB-TiO 2 @MFA to TiO 2 @MFA was 2.44, and the selectivity coefficient of TB-TiO 2 to TiO 2 was 2.76. This work had certain reference significance for designing specific functional photocatalytic materials.