Fabrication of BiOCl/ZnO/CN Nanocomposite for Visible‐Light Photocatalytic Degradation of Dyes

Abstract

The zinc oxide (ZnO) based heterogeneous semiconductors has acknowledged extensive attention but its property was radically repressed because of diminutive visible light photocatalytic activity. Herein, metal-nonmetal hetero-structure coupling is adopted to encompass the visible light harvesting capability and endorses the charge separation and transferring efficiency. Graphitic-carbon-nitride (CN) and bismuth oxychloride (BiOCl) semiconductors were effectively incorporated into the ZnO crystal structure by hydrothermal and calcination treatments. The obtained BiOCl/ZnO/CN nanocomposite has improved visible light capability with efficient separation and low recombination rate of photo generated charges. The synergistic effect of semiconductors coupling endues BiOCl/ ZnO/CN with superior photocatalytic activity up to 98.6% for Rhodamine B (RhB) and 93.5% for Methyl Orange (MO) with rate constant (k) = 0.2134 min À 1 and 0.138 min À 1 respectively. Furthermore, BiOCl/ZnO/CN sample has outstanding stability and reusability. Scavengers trapping experiments validate that superoxide and holes are the main active species in the photocatalytic reaction.

A Facile Synthesis of BiO(ClBr)0.5−x/2Ix Microsphere Assembly as High‐efficiency Visible‐light Driven Photocatalyst

“…In contrast, the narrow bandgap of BiOI possesses poor redox potential [6] . To overcome these drawbacks, various strategies have been approached, such as heterojunction construction, [7] and aliovalent doping [8] . Solid solution formation is another easy way to tune the band edge position toward a suitable bandgap value within adequate redox potentials for reduction and oxidation processes.…”

One-pot construction of robust BiOCl/ZnO p–n heterojunctions with semi-coherent interfaces toward improving charge separation for photodegradation enhancement

“… 30 Similarly, Zhang et al have demonstrated that BiOCl/ZnO/C 3 N 4 photocatalyst exhibited superior photodegradation performance for RhB and methyl orange (MO) to BiOCl/ZnO, BiOCl and C 3 N 4 . 31 Additionally, Liu et al have prepared BiOCl/ZnO heterostructures with oxygen-rich vacancies using a one-step microwave technique, which can effectively enhance photocatalytic performance for the degradation of tetracycline hydrochloride (TC-HCl) than those of pure BiOCl and ZnO. This study showed that oxygen vacancy and interfacial electric field derived from heterostructures were responsible for the improvement of light harvesting and the separation efficiency of photogenerated charge carriers.…”

BiOI With High Intensity Ratio of (110)/(102) Facets and Iodine Vacancies: Facile Synthesis, Strong Adsorption and Visible‐Light Photocatalytic Performance

“…Finding solutions to water pollution as soon as possible is a necessary condition for the further development of society. As a representative of green chemistry, photocatalysis has the advantages of simple operation, green pollution‐free, and fast degradation rate in the degradation of water pollutants [1–7] . In particular, it can completely degrade organic pollutants into harmless H 2 O and CO 2 , and will not cause secondary pollution.…”

“…As a representative of green chemistry, photocatalysis has the advantages of simple operation, green pollution-free, and fast degradation rate in the degradation of water pollutants. [1][2][3][4][5][6][7] In particular, it can completely degrade organic pollutants into harmless H 2 O and CO 2 , and will not cause secondary pollution. Bismuth oxyiodides (BiOI), as a typical main group V-VI-VII ternary semiconductors with layered crystal structures, [8] the unit cell consists of 6 atoms (2 O, 2 Bi, 2 I), a Bi atom coordinates with the surrounding 4 O atoms and 4 I atoms to form an decahedral asymmetrical cone structure.…”