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Acute Photocatalytic Oxidation of Tetracycline by Novel Ag3PO4/BiPO4/Hydroxyapatite Heterojunction

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Abstract
We present the first-ever synthesis of the Ag3PO4/BiPO4/HAp nanocomposite, a phosphate-based heterojunction, for visible-light-driven photocatalysis application. The photocatalyst was synthesized via a facile hydrothermal method and comprehensively characterized through different techniques including XRD, SEM-EDS, BET-SA, DRS, XPS, PL, and photoelectrochemical analysis (Mott – Schottky, transient photocurrent and EIS analysis). The photocatalytic activity of the as-prepared novel nanocomposite was scrutinized for the degradation of non-biodegradable pharmaceutical waste, i.e. Tetracycline (TC), under visible light irradiation of 165W. The novel Ag3PO4/BiPO4/HAp nanocomposite catalyst exhibited synergistic results as it revealed much higher photocatalytic degradation efficiency (90%) than the Ag3PO4/BiPO4 (70%) and the individual catalysts, i.e. Ag3PO4 (60%), BiPO4 (10%) and HAp (0%), under the same irradiation conditions. The augmented rate of photocatalytic efficiency of the nanocomposite could be ascribed to the high visible light absorption capacity of Ag3PO4/BiPO4/HAp and significantly reduced charge carrier recombination through both the heterojunction of Ag3PO4/BiPO4 and presence of HAp in the composite. The latter, thus, offering high surface area and enhanced adsorption which promotes the mass transfer in heterogeneous photocatalysis reaction. The scavenger experiments illustrated that hydroxyl radicals (•OH) were the leading active species in the presented photocatalytic process.
Author(s)
파티마 카즈민
Issued Date
2020
Awarded Date
2020-08
Type
Dissertation
URI
https://oak.ulsan.ac.kr/handle/2021.oak/6108
http://ulsan.dcollection.net/common/orgView/200000337717
Affiliation
울산대학교
Department
일반대학원 환경공학전공
Advisor
Professor Byeong Kyu Lee
Degree
Master
Publisher
울산대학교 일반대학원 환경공학전공
Language
eng
Rights
울산대학교 논문은 저작권에 의해 보호받습니다.
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Environmental Construction Engineering > 1. Theses (Master)
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