Preparation of BiOCl/Bi2S3 composites by simple ion exchange method for highly efficient photocatalytic reduction of Cr6+

Supported metal and metal oxide particles with proximity effect for catalysis

“…Lu et al reported BiOCl/Bi 2 S 3 composite preparation by simple ion exchange method for the photocatalytic reduction of hexavalent chromium. 104 Compared to pure BiOCl, the nanocomposite synthesized by the ion exchange method describes better catalytic activity.…”

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

“…34,65,166,168 For example, Bi 2 S 3sensitized BiOCl composites with different morphologies showed efficient separation efficiency of photogenerated charge carriers as well as excellent stability and reusability, which can be simply synthesized by an economical ion exchange strategy using BiOCl as a precursor. 34,65,167,169 In this synthesis, hollow BiOCl was prepared by a water bath method initially. Then, the as-fabricated BiOCl was added into thioacetamide solution with ultrasound assistance, and subsequently the above mixtures were heated to synthesize the hollow spherical Bi 2 S 3 /BiOCl composites (see Figure 15a− d).…”

“…Then, the as-fabricated BiOCl was added into thioacetamide solution with ultrasound assistance, and subsequently the above mixtures were heated to synthesize the hollow spherical Bi 2 S 3 /BiOCl composites (see Figure 15a− d). 167 This structure possessed a large specific surface area, strong visible light absorption, and high separation rate of charge carriers, leading to a higher removal efficiency for Cr 6+ ions than the individual BiOCl (see Figure 15e). Figure 15f displays the corresponding photocatalytic mechanism for the reduction of Cr 6+ ions.…”

“…Thereby, the photoinduced electrons in the CB of Bi 2 S 3 would diffuse to the CB of BiOCl due to the difference of CB potential in the two semiconductors, which dwindled the recombination of charge carriers to improve the photocatalytic performance of BiOCl. 167 Moreover, Jiang and co-workers have fabricated hierarchical flower-like Bi 2 S 3 /BiOCl composites by in situ etching of BiOCl in thiacetamide solution, which displayed an enhanced visible-light-driven photocatalytic activity for the degradation of RhB due to the formation of heterostructure and the larger surface area of hierarchical structure. 65 Similarly, this group has also demonstrated that the photocatalytic activity of 3D flower-like Bi 2 S 3 /BiOCl composites was superior to 2D plate-like Bi 2 S 3 /BiOCl composites.…”

Bi/BiOCl Nanosheets Enriched with Oxygen Vacancies to Enhance Photocatalytic CO2 Reduction

“…However, the CO 2 reduction efficiency of BiOCl photocatalysts is usually quite low because of the following reasons: limited light absorption capacity, low efficiency of electron-hole carriers, and fast recombination of photogenerated electron-hole pairs. Various strategies, such as controlling exposed active facets [12][13][14], forming oxygen vacancies [10,11,15,16], loading metals as cocatalysts [17][18][19], and constructing heterojunctions [20][21][22][23], are used to improve the photocatalytic efficiency of BiOCl catalysts. The strategy of loading metals as cocatalysts onto BiOCl to enhance photocatalytic activity has gained increasing attention because cocatalysts can form Schottky barriers as strong electron traps to direct the flow of electrons.…”