Photocatalytic Hydrogen Production by Stable CsPbBr₃@PANI Nanoparticles in Aqueous Solution

Abstract

CsPbX3 (X=Cl, Br, I) nanocrystals (NCs) are considered as one of the most promising photocatalytic materials. Unfortunately, their environmental instability, especially the intrinsic water vulnerability, brought their applications major obstacles in the photosynthetic fields. To improve the stability for photocatalytic water splitting, we for the first time chose conductive polymer, polyaniline (PANI), as the encapsulating material to fabricate CsPbBr3@PANI nanoparticles (NPs) by photo‐polymerization method. After optimizing, the photocatalytic hydrogen production efficiency of CsPbBr3@PANI NPs reached 4.81 mmol/(h ⋅ g) and the catalytic lifetime achieved 120 hours. Our work that achieved the stable CsPbBr3@PANI NPs shed light on potential opportunity for catalytic application of CsPbBr3 NCs.

An investigation on PANI/NENP-1 composite as a novel photocatalyst for photocatalytic dye wastewater degradation and photocatalytic hydrogen evolution

“…Therefore, the photocatalytic performance was improved by heteroatomdoping, 9 creating different nanostructures, 10 and constructing heterojunctions. 11 Covalent organic structures (COFs), a new class of crystalline porous materials covalently linked to organic monomers, have attracted much attention for their tunable porosity, precise atomic structures, and modifiable framework. In addition, COFs can provide multiple highspeed charge carrier (electrons, holes, and ions) transport pathways, [12][13][14] including conjugated frameworks, stacked p-electron clouds, open channels, and variable chemistry, which provide great potential for development in the field of photocatalysis.…”

“…Therefore, the photocatalytic performance was improved by heteroatom-doping, 9 creating different nanostructures, 10 and constructing heterojunctions. 11…”

Metal Halide Perovskites for Solar Fuel Production and Photoreactions

“…Malavasi's group reported w a t e r -s t a b l e S n -b a s e d c o m p o s i t i o n s ((C 6 H 5 (CH 2 ) 2 NH 3 ) 2 SnBr 4 39 and (CH 3 ) 2 NH 2 SnBr 3 40 ), and Yao's group stabilized CsPbBr 3 nanoparticles by encapsulating them with polyaniline. 41 Wang's group reported photocatalytic H 2 generation by designing surface ligands of CsPbBr 3 quantum dots in a humid gaseous medium, which exhibited excellent stability over 160 h. 42 The reported photocatalytic activities for H 2 generation of these systems are deficient even when using hole scavengers, leaving much room for further improvement of the activity.…”

“…The reported solar-to-HI splitting efficiency (STHI) values are indicated in the lower right corner of the data point. Data obtained from refs , − , and − . (b) Production rate and selectivity of the photocatalytic CO 2 reduction reaction using MHPs.…”

“…In addition to MHP stabilization through dynamic equilibrium, other stabilization strategies have been reported to expand the MHP photocatalysis reaction conditions of aqueous solutions. Malavasi’s group reported water-stable Sn-based compositions ((C 6 H 5 (CH 2 ) 2 NH 3 ) 2 SnBr 4 and (CH 3 ) 2 NH 2 SnBr 3 ), and Yao’s group stabilized CsPbBr 3 nanoparticles by encapsulating them with polyaniline . Wang’s group reported photocatalytic H 2 generation by designing surface ligands of CsPbBr 3 quantum dots in a humid gaseous medium, which exhibited excellent stability over 160 h .…”