Photocatalytic removal of NO by light-driven Mn3O4/BiOCl heterojunction photocatalyst: Optimization and mechanism

One-pot hydrothermal synthesis of CuBi2O4/BiOCl p–n heterojunction with enhanced photocatalytic performance for the degradation of tetracycline hydrochloride under visible light irradiation

“…5c) shows two peaks at 198.0 eV and 199.5 eV that belong to Cl 2p 3/2 and Cl 2p 1/2 , respectively. 34,46 With the formation of CBO/BOC composite, the peaks of Cl 2p shift to higher binding energy (198.2 eV and 199.7 eV), which further demonstrate the electrons in 20-CBO/BOC transfer from BiOCl to CuBi 2 O 4 . 34 The Bi 4f XPS spectra of BiOCl and CuBi 2 O 4 (Fig.…”

“…21,22 So far, much research has been conducted to overcome these drawbacks of BiOCl, including elemental doping, [23][24][25] precious metal loading, 26,27 defect control, [28][29][30] surface photosensitization [31][32][33] and construction of heterojunctions. 15,34,35 Among these, the p-n heterojunction photocatalyst has been found to promote the separation and transfer of charge carriers mainly owing to the formation of an internal electric field between the two components, thereby improving the photocatalytic activity of the catalyst considerably. 36 CuBi 2 O 4 is a p-type semiconductor.…”

Photocatalytic Degradation of Valsartan by MoS2/BiOCl Heterojunctions

“…Moreover, bismuth oxyhalides (BiOCl, BiOI and BiOBr), have shown high performance in different photocatalytic configurations [24][25][26]. Among them, BiOCl, due to its layered structure, has an internal electrostatic field, resulting in the successful separation of photogenerated electronhole pairs [27][28][29][30]. As a result, it has been successfully adopted as photocatalyst in many studies [27][28][29][30].…”

“…Among them, BiOCl, due to its layered structure, has an internal electrostatic field, resulting in the successful separation of photogenerated electronhole pairs [27][28][29][30]. As a result, it has been successfully adopted as photocatalyst in many studies [27][28][29][30]. For example, Zhang et al [24] used BiOCl to degrade methyl orange (MO) dye, showing superior performance than TiO 2 (P25).…”

“…For example, Zhang et al [24] used BiOCl to degrade methyl orange (MO) dye, showing superior performance than TiO 2 (P25). However, its large band gap energy (3.2 eV) restricts its activity only under UV light [27][28][29][30]. In order not only to extend BiOCl's visible light harvesting properties, but also to enhance its photocatalytic activity, researchers have proposed many morphological and structural modifications [31][32][33].…”