Boosting photocatalytic activity under visible-light by creation of PCN-222/g-C3N4 heterojunctions
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Physical Sciences and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/653029
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AbstractMetalloporphyrin 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.
CitationJia H, Ma D, Zhong S, Li L, Li L, et al. (2019) Boosting photocatalytic activity under visible-light by creation of PCN-222/g-C3N4 heterojunctions. Chemical Engineering Journal 368: 165–174. Available: http://dx.doi.org/10.1016/j.cej.2019.02.147.
SponsorsThis 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].
JournalChemical Engineering Journal