TY - JOUR
T1 - Boosting photocatalytic activity under visible-light by creation of PCN-222/g-C3N4 heterojunctions
AU - Jia, Huaijie
AU - Ma, Dingxuan
AU - Zhong, Shaowei
AU - Li, Lanjie
AU - Li, Lin
AU - Xu, Lei
AU - Li, Baiyan
N1 - KAUST Repository Item: Exported on 2020-04-23
Acknowledgements: This work was supported by the Science and Technology Development Plan of Jilin Province in China [20180520081JH, 20150203013YY, 20120223] and the Education Department of Jilin province [grant number 2016-382].
PY - 2019/2/25
Y1 - 2019/2/25
N2 - Metalloporphyrin metal-organic frameworks are excellent photocatalyst candidates due to their strong visible-light absorbing ability, high specific surface areas, and semiconductive properties. Herein, we constructed a visible-light driven PCN-222/g-C3N4 heterojunction via a facile one-pot solvothermal method. The optimum composite with 1.0 wt% PCN-222/g-C3N4 showed the superior photocatalytic activity for degradation of RhB and Ofloxacin under visible-light irradiation, which are 3.1 and 2.97 times higher than pure g-C3N4 under same conditions. The enhanced photocatalytic activity of the PCN-222/g-C3N4 composite is attributed to the extended light response range, fast generation and efficient separation of the photo-generated carrier, and enhanced adsorption capacity of organic contaminants. Besides O2− radical and hVB+ species, OH radical is also the active species in the PCN-222/g-C3N4 photocatalytic system, which may be additional evidence for the enhanced photocatalytic activity of PCN-222/g-C3N4 with respect to pristine g-C3N4. As-prepared PCN-222/g-C3N4 photocatalyst shows excellent recyclability, which can be reused four times without significant inactivation. Therefore, PCN-222/g-C3N4 heterojunction photocatalysts have great potentiality in organic wastewater treatment.
AB - Metalloporphyrin metal-organic frameworks are excellent photocatalyst candidates due to their strong visible-light absorbing ability, high specific surface areas, and semiconductive properties. Herein, we constructed a visible-light driven PCN-222/g-C3N4 heterojunction via a facile one-pot solvothermal method. The optimum composite with 1.0 wt% PCN-222/g-C3N4 showed the superior photocatalytic activity for degradation of RhB and Ofloxacin under visible-light irradiation, which are 3.1 and 2.97 times higher than pure g-C3N4 under same conditions. The enhanced photocatalytic activity of the PCN-222/g-C3N4 composite is attributed to the extended light response range, fast generation and efficient separation of the photo-generated carrier, and enhanced adsorption capacity of organic contaminants. Besides O2− radical and hVB+ species, OH radical is also the active species in the PCN-222/g-C3N4 photocatalytic system, which may be additional evidence for the enhanced photocatalytic activity of PCN-222/g-C3N4 with respect to pristine g-C3N4. As-prepared PCN-222/g-C3N4 photocatalyst shows excellent recyclability, which can be reused four times without significant inactivation. Therefore, PCN-222/g-C3N4 heterojunction photocatalysts have great potentiality in organic wastewater treatment.
UR - http://hdl.handle.net/10754/653029
UR - https://www.sciencedirect.com/science/article/pii/S1385894719303869
UR - http://www.scopus.com/inward/record.url?scp=85062080215&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2019.02.147
DO - 10.1016/j.cej.2019.02.147
M3 - Article
AN - SCOPUS:85062080215
SN - 1385-8947
VL - 368
SP - 165
EP - 174
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -