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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Amoxicillin photodegradation under visible light catalyzed by metal-free carbon nitride: An investigation of the influence of the structural defects

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Author(s):
Silva, Ingrid F. [1] ; Teixeira, Ivo F. [2] ; Rios, Regiane D. F. [1] ; do Nascimento, Gustavo M. [3] ; Binatti, Ildefonso [4] ; Victoriae, Henrique F. V. [5] ; Krambrock, Klaus [5] ; Cury, Luiz A. [5] ; Teixeira, Ana Paula C. [1] ; Stumpf, Humberto O. [1]
Total Authors: 10
Affiliation:
[1] Univ Fed Minas Gerais, Dept Quim, ICEx, BR-31270901 Belo Horizonte, MG - Brazil
[2] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Fed ABC, Ctr Ciencias Nat & Humanas CCNH, BR-09210580 Santo Andre, SP - Brazil
[4] Ctr Fed Educ Tecnol Minas Gerais, Dept Quim, BR-30421169 Belo Horizonte, MG - Brazil
[5] Univ Fed Minas Gerais, Dept Fis, ICEx, BR-31270901 Belo Horizonte, MG - Brazil
Total Affiliations: 5
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 401, JAN 5 2021.
Web of Science Citations: 5
Abstract

Herein, the structural defects of metal-free polymeric carbon nitrides were controlled by making use of different precursors in their syntheses, i.e. melamine (CN-M) and thiourea (CN-T), as well as a 1:1 mixture of them (CN-1M:1 T). By controlling the structural defects, the electronic, morphological and chemical properties were modified. Additionally, the activities of synthesized PCNs were evaluated for amoxicillin photodegradation under visible light irradiation (16 mW cm(-2)). The results of photocatalytic tests showed that CN-T material has better efficiency (100 % removal within 48 h), which is directly related to the greater number of defects present in its structure with consequent improvement of electron-hole pairs separation efficiency. The CN-T material showed excellent stability with only 13 % decrease in its photocatalytic activity after the third cycle. A mechanism for amoxicillin degradation by CN-T was proposed based on the ESI-MS and the in situ EPR allied with spin trapping method investigations. (AU)

FAPESP's process: 17/50118-9 - Plasmonic nanoparticles supported on semiconductors and its applications in photocatalysis
Grantee:Ivo Freitas Teixeira
Support type: Regular Research Grants