Mechanism of nitrogen-fluoride co-doped TiO₂/bentonite composites removing tetracycline: A study in the co-doping ratio

Teng WANG; Zhaofu MENG; Xinxin WANG; Amjad ALI; Xuewen CAO; Lin LIU

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자료유형: 학술저널

저자정보: Teng WANG (Northwest A&F University) Zhaofu MENG (Northwest A&F University) Xinxin WANG (Northwest A&F University) Amjad ALI (Northwest A&F University) Xuewen CAO (Northwest A&F University) Lin LIU (Northwest A&F University)

저널정보: 대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제26권 제6호

발행연도: 2021.12

수록면: 199 - 209 (11page)

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N-doped and N-F co-doped TiO₂/bentonite composites were synthesized via the gel-sol method. The morphology, structure and surface charge of the composite before and after adsorption were used to determine the effect N/F doping ratio on TC removal. The results showed that, compared with undoped samples, the TC adsorption on N doped composites was reduced by 24.44% on average. N-F co-doping significantly increased the TC adsorption when the Ti-N-F molar ratio was 1:1: 0.01, reaching a maximum TC adsorption of 64.00 mmol·kg<SUP>-1</SUP>. The coverage of the N doped TiO₂ increases as the N doping ratio increases; the specific surface area increased by 2.03 % on average, but the number of surface negative charges decreased by 36.24 % on average. FT-IR results confirmed that N doping reduced the number of -OH groups on the N-doped composites. Additionally, fluorination of N-F co-doped TiO₂ and bentonite surfaces inhibits hydrogen bonding and π-π interactions between the TC and the composites. As the N doping ratio increased, the coverage of N-F co-doped TiO₂ on the composite surface increased, resulting in the TC adsorption decrease with the increases N doping ratio.

#Adsorption #Co-doped #Fluoride #Nitrogen #Tetracycline #TiO₂

참고문헌 (41)

참고문헌 신청

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