TiO₂ Nanoparticles Decorated on BiOCl Flakes with Enhanced Visible Light Photocatalytic Activity

Abstract

Facile preparation route for BiOCl and BiOCl/TiO2 nanocomposites with TiO2 nanoparticles decorated on BiOCl flakes via solution combustion method is reported in the present paper. Structural, textural and optical properties of the prepared materials are extensively studied using various physicochemical characterization tools such as X‐ray diffraction (XRD), field‐emission scanning electron microscopy (FE‐SEM), transmission electron microscopy (TEM), UV‐vis spectroscopy (DRS), N2 adsorption‐desorption study (BET), photoluminescence spectroscopy (PL), etc. BiOCl/TiO2 nanocomposites show a red shift in the light absorption as compared to that of bare BiOCl which leads to the extended absorption in visible light region. Further photocatalytic experiments for Rhodamine B and phenol degradation demonstrate that the BiOCl/TiO2 nanocomposites have superior photocatalytic properties than bare BiOCl. Improved photocatalytic performance of BiOCl/TiO2 composites is attributed to the synergistic effect between BiOCl flakes and TiO2 nanoparticles, extended visible light absorption and delayed charge recombination.

Synthesis, Functional Modifications, and Diversified Applications of Hybrid BiOCl-Based Heterogeneous Photocatalysts: A Review

“…60,102 For instance, Shinde and co-workers have successfully developed n-TiO 2 /p-BiOCl heterojunctions by a facile solution combustion method to achieve n-type TiO 2 NPs deposited on p-type BiOCl flakes. 107 The as-prepared TiO 2 /BiOCl photocatalysts showed a superior visible light absorption to pure BiOCl and displayed an excellent photocatalytic activity for the degradation of RhB and phenol.…”

“…According to previous research, BiOCl-based photocatalysts can be divided into three main categories: metal/BiOCl, semiconductor/BiOCl, and carbon/BiOCl heterogeneous structures. − ,,,,− ...…”

“…The synthesis of type-II and Z-scheme junctions in metal oxide (sulfide)/BiOCl systems is a promising method to acquire higher photocatalytic performances, which provides a better opportunity to understand the transfer pathways of photoinduced charge carriers and further reveals the photocatalytic mechanisms. In recent years, the controllable synthesis of metal oxide (sulfide)/BiOCl and other oxysalts/BiOCl photocatalysts has been extensively reported, and the relationships between structure and property as well as performance of products have also been amply elucidated. − …”

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.…”