Peroxymonosulfate Activation by Bi2WO6/BiOCl Heterojunction Nanocomposites under Visible Light for Bisphenol A Degradation

Abstract

The combination of peroxymonosulfate (PMS) activation and photocatalysis has proven to be effective for organic contaminants treatment. However, the construction of an efficient catalytic material is an important challenge. Herein, novel Bi2WO6/BiOCl heterojunction nanocomposites were successfully designed and fabricated using a facile and effective strategy for bisphenol A (BPA) photodegradation with PMS activation. The well-designed heterojunction with improvement of the contact area and interface microstructure was obtained through in situ growth of the Bi2WO6 on the surface of BiOCl. The Bi2WO6/BiOCl nanocomposites exhibit excellent catalytic performance in PMS activation for BPA degradation under visible light irradiation. A possible photocatalytic reaction mechanism was systematically revealed. The excellent catalytic performance is mainly attributed to the strong interaction between Bi2WO6 and BiOCl, resulting in an enhanced photoabsorption and a more efficient interfacial charge separation and transfer. This paper provides a novel strategy to design efficient catalytic materials for organic contaminants remediation with PMS activation.

Efficient Activation of Peroxymonosulfate by V-Doped Graphitic Carbon Nitride for Organic Contamination Remediation

“…The specific surface areas of the g-C3N4, V-g-C C3N4-0.2, V-g-C3N4-0.5, and V-g-C3N4-0.8 were calculated to be ca. 16.95, 17.63 and 25.56 m 2 /g, respectively. It can be seen that the doping V atoms into the g-C3N4 may slightly ameliorate the specific surface areas.…”

“…•− ) generated from peroxymonosulfate (PMS) activation have been widely exploited due to their stronger oxidative capacity and longer lifetime [14][15][16]. More importantly, SO 4…”

Preparation and photocatalytic properties of a CdWO4/Bi2WO6 binary heterojunction

“…[11][12][13] Despite its narrow band gap of 2.67 eV, 14 its potential use is hindered by the fast electron-hole pair recombination rate generated by light and its suboptimal photo-degradation efficiency. 15 Various approaches, such as controlling morphology, 16 depositing noble metals, 17 and constructing heterostructures, [18][19][20][21][22] have been investigated to improve the Bi 2 WO 6 effectiveness in photocatalysis. Cadmium tungstate (CdWO 4 ), another metal tungstate, is recognized for its superior chemical and optical properties, positioning it as a potential candidate for photocatalytic materials.…”