The effects of bismuth (III) doping and ultrathin nanosheets construction on the photocatalytic performance of graphitic carbon nitride for antibiotic degradation

[Display omitted] To further enhance the photocatalytic performance of graphitic carbon nitride (g-C3N4), we rationally combined two strategies (foreign metal doping and ultrathin nanosheet construction) to synthesize bismuth (III) (Bi3+) doped ultrathin g-C3N4 nanosheets (Bi-CNNS) via one-step ther...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2019-01, Vol.533, p.513-525
Main Authors: Wang, Min, Jin, Chongyue, Li, Zhilin, You, Meiyan, Zhang, Yu, Zhu, Tong
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemistry
Bismuth (III) doping
Bismuth - chemistry
Catalysis
g-C3N4
Gas Chromatography-Mass Spectrometry
Graphite - chemistry
Metal Nanoparticles - chemistry
Nitriles - chemistry
Particle Size
Photocatalyst
Photochemical Processes
Surface Properties
Tetracycline
Ultrathin nanosheets
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] To further enhance the photocatalytic performance of graphitic carbon nitride (g-C3N4), we rationally combined two strategies (foreign metal doping and ultrathin nanosheet construction) to synthesize bismuth (III) (Bi3+) doped ultrathin g-C3N4 nanosheets (Bi-CNNS) via one-step thermal polymerization method using melamine as the raw material, bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) as the dopant source, and nitric acid (HNO3) and acetic acid (AC) as soft templates for the ultrathin nanosheets construction. The Bi-CNNS catalysts exhibited an excellent photocatalytic performance in tetracycline (TC) degradation. The TC removal efficiency reached to be 94.1% in 30 min under visible-light irradiation over 0.03Bi-CNNS, which is 6.03 times higher than that of pure g-C3N4 (CN). The higher specific surface area, narrower bandgap, the improved photoexcited electron-hole pair transfer and separation efficiency, and prolonged carrier lifetimes in the Bi3+-doped ultrathin g-C3N4 nanosheets led to a significantly enhanced photocatalytic performance. The main radical species responsible for the degradation of tetracycline over 0.03Bi-CNNS were O2− and OH. Moreover, the possible photodegradation intermediate products of TC were detected by gas chromatography–mass spectroscopy (GC–MS), and a possible pathway was proposed.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2018.08.113