Fast degradation of phenol over porphyrin-polyoxometalate composite photocatalysts under visible light
Zhinan Xia, Libo Wang, Qiu Zhang, Fengyan Li, Lin Xu
Abstract
Both polyoxometalates (POMs) and metalloporphyrins exhibit high Arial. 9 efficiency. In this work, we designed two new composite catalysts with [5,10,15,20-tetra-(4-carboxylphenyl)-porphyrinato]-ferric chloride (FeTCPP) and H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub> (PW<sub>12</sub>)/H<sub>3</sub>PMo<sub>12</sub>O<sub>40</sub> (PMo<sub>12</sub>), forming FeTCPP-PW<sub>12</sub> and FeTCPP-PMo<sub>12</sub> composite catalysts. The diameter of the catalyst particles was controlled by varying the dosage of the two reactants. The synthesis method of the catalysts is simple to operate and it can be obtained by ordinary precipitation after dissolution. Furthermore, the catalysts exhibited satisfactory activity and stability under the condition of repetitive tests. Our findings showed that phenol was almost completely degraded in 10 min under photocatalytic conditions catalyzed by the FeTCPP-PMo<sub>12</sub> photocatalyst. This work provides new concepts for developing new types of materials for environmental applications.