0D/2D CsPbBr₃ Nanocrystal/BiOCl Nanoplate Heterostructure with Enhanced Photocatalytic Performance

Abstract

0D‐2D p–n type CsPbBr3/BiOCl heterojunction photocatalyst is successfully fabricated via the electrostatic self‐assembly process. On the basis of the photoluminescence and photocurrent density results, the CsPbBr3/BiOCl composite exhibits a higher charge separation rate than pure BiOCl and CsPbBr3. The degradation of Rhodamine B (RhB) result shows that the CsPbBr3/BiOCl composite obtains the highest degradation rate of close to 100% within 60 min, which is significantly higher than those of pure CsPbBr3 (84.21%) and BiOCl (73.57%) because the p–n type heterojunction photocatalyst can promote the separation of photogenerated charge carriers. The free radical capture experiment demonstrates that •O2− plays a major role in the photodegradation of RhB. This study may provide insights into designing advanced photocatalysts for the clean‐ups of environmental pollutants.

A Novel Organic/Inorganic Dual Z-Scheme Photocatalyst with Visible-Light Response for Organic Pollutants Degradation

“…The main active species produced by the PAN/PANI-Sb2S3-ZnO membrane during photocatalysis were investigated using free radical capture experiments, as shown in Figure 14a. •O2 − , •OH, h + , and e − were quenched by adding BQ, t-BuOH, OA, and AgNO3, respectively [49][50][51]. It was observed that the photocatalytic degradation efficiency decreased after the addition of trapping agents.…”

In situ growth of Cs3Bi2Br9 on ultrathin BiVO4 nanosheets to fabricate heterojunction intimate interfaces for enhancing photocatalytic activity

“…27 Recently, many researchers have shown that constructing a well-designed heterojunction structure of perovskite with another semiconductor material is a highly promising strategy to boost the interfacial electron-hole pair separation and transfer pathways, which further significantly inhibits carrier recombination thereby facilitating surface catalytic reactions. [32][33][34] The designed heterojunction photocatalysts, such as CsPbBr 3 /TiO 2 , 35 MASnI 3 /TiO 2 , 36 CsPbBr 3 /BiOCl, 37 CsPbBrCl 2 /g-C 3 N 4 38 have demonstrated enhanced photocatalytic activity in the remediation of organic pollutants compared to single perovskite counterparts. Notably, the S-scheme heterojunction [39][40][41] is a promising solution consisting of two n-type semiconductors with a staggered energy band structure, which facilitates the spatial separation of the carriers and promotes energy band bending, leading to the formation of an internal electric field (IEF) and maximizing the redox capacity, which is very beneficial for the photocatalytic degradation of organic dye pollutants under visible light.…”

Zero-dimensional organic–inorganic hybrid zinc halide with broadband yellow light emission

“…In the past decade, metal halide perovskites have been widely used in solar cells, light-emitting diodes, sensors and lasers due to their excellent photoelectric properties and facile assembly process. [1][2][3][4][5][6] In addition to the excellent photovoltaic effect in solar cells, metal halide perovskites also have become highly desirable candidates for luminescent materials due to high defect tolerance, adjustable band gap and emission position in the whole visible-light range, and high PLQYs. [7][8][9] As a classical three-dimensional (3D) perovskite, APbX 3 (A = Cs + , CH 3 NH 3 + , CH(NH 2 ) + ) have unique advantages of narrow full width at half-maximum (FWHM), wide color gamut and near-unity PLQY.…”