Premium
Study on Catalytic Performance of rGH/Fe‐g‐C 3 N 4 Photocatalysis‐Fenton Synergy System[1]
Author(s) -
Ma Dong,
Jia Yuan,
Wang Peng
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902846
Subject(s) - catalysis , photocatalysis , photocurrent , phenol , electron transfer , graphene , degradation (telecommunications) , chemistry , nuclear chemistry , materials science , inorganic chemistry , photochemistry , nanotechnology , organic chemistry , telecommunications , optoelectronics , computer science
Graphene and Fe‐g‐C 3 N 4 were combined to form a three‐dimensional catalytic gel material with visible light response. The graphene gel enabled the rapid recovery of the catalyst and improved cycling performance. In this work, the co‐degradation efficiency of the rGH/Fe‐g‐C 3 N 4 photocatalytic‐Fenton system was investigated using phenol to simulate organic pollutants. A phenol concentration of 20±0.1 mg L −1 could be completely degraded by the 10% rGH/Fe‐g‐C 3 N 4 after 50 min, and the photocurrent was 5.1 times and 1.8 times larger than that of g‐C 3 N 4 and Fe‐g‐C 3 N 4 , respectively. In this system, the reaction of photogenerated electrons with Fe 3+ promotes the rapid transfer of photogenerated charges. Additionally, Fe 2+ participates in the Fenton reaction to rapidly form ⋅ OH to promote cycling of the Fe valence state. Moreover, the π‐π conjugated graphene accelerates the transfer of electrons and results in the direct reduction of H 2 O 2 to form ⋅OH. Furthermore, compared with the powder Fe‐g‐C 3 N 4 catalyst, 10% rGH/Fe‐g‐C 3 N 4 showed excellent recoverability and cyclability. After seven cycles, the degradation efficiency reached >86±1%. Finally, a degradation experiment with coking wastewater was carried out under optimized conditions. After 60 min, the COD and TOC values decreased from 67.8±1 mg L −1 and 21.6±0.2 mg L −1 , to 21.6±1 mg L −1 and 6.7±0.2 mg L −1 , respectively.