In:
Physical Chemistry Chemical Physics, Royal Society of Chemistry (RSC), Vol. 25, No. 17 ( 2023), p. 12231-12244
Abstract:
A novel 1D/2D step-scheme Bi 2 O 3 /g-C 3 N 4 was prepared using a simple reflux method. Bi 2 O 3 photocatalysts showed lower photocatalytic activity for the degradation of tetracycline hydrochloride under visible light irradiation. After compositing with g-C 3 N 4 , the photocatalytic activity of Bi 2 O 3 was enhanced obviously. The enhanced photocatalytic activity of the Bi 2 O 3 /g-C 3 N 4 photocatalysts could be attributed to the high separation efficiency of carriers generated by the Bi 2 O 3 /g-C 3 N 4 photocatalyst due to the formation of a step-scheme heterojunction, which inhibited the recombination of photogenerated electrons and holes. In order to further enhance the degradation efficiency of tetracycline hydrochloride, Bi 2 O 3 /g-C 3 N 4 was used to activate peroxymonosulfate under visible-light irradiation. The influences of peroxymonosulfate dosage, pH value and tetracycline hydrochloride concentration on activating peroxymonosulfate to degrade tetracycline hydrochloride were investigated in detail. The mechanism of Bi 2 O 3 /g-C 3 N 4 activating peroxymonosulfate was proved by radical quenching experiments and electron paramagnetic resonance analysis, which proved that the sulfate radical and hole dominated the degradation of tetracycline hydrochloride. The possible vulnerable sites and pathways of tetracycline hydrochloride were predicted via DFT calculations based on Fukui function and UPLC-MS. Toxicity Estimation Software predicts that the degradation processes of tetracycline hydrochloride could gradually reduce toxicity. This study could provide an efficient and green method for the subsequent treatment of antibiotic wastewater.
Type of Medium:
Online Resource
ISSN:
1463-9076
,
1463-9084
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1476283-3
detail.hit.zdb_id:
1476244-4
detail.hit.zdb_id:
1460656-2
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