Hydrothermal synthesis of stable lead-free Cs₄MnBi₂Cl₁₂ perovskite single crystals for efficient photocatalytic degradation of organic pollutants

Abstract

Recently, the photocatalytic degradation of organic pollutants using halide perovskite materials have increasingly attracted people's attention. However, the stability issues and the lead toxicity of such materials cast a shadow...

Room-temperature synthesis of Ag- and Mn-doped Cs2NaBiCl6 octahedrons for dye photodegradation

“…The mechanism on the dye photodegradation with Ag-doped and Mn-doped CNBC octahedrons is similar with that of the previously-reported photocatalytic decomposition of dyes dissolved in ethanol in the presence of Pb-free halide perovskites. 42,58 As already depicted in Scheme 1c, electrons (e − ) and holes (h + ) can be excited under irradiation with photon energy higher than or equal to the bandgap of the CNBC-based photocatalysts. The excited electrons e − are captured by O 2 adsorbed on the surface of CNBC-based particles or dissolved in solution to produce free radicals (˙O 2 − ), which will react with the activated dyes to form degradation products.…”

“…5b illustrates the time-dependent absorption spectra of the RhB solution during the photodegradation when the Ag-doped CNBC photocatalyst was present, suggesting a progressive decolorization of the RhB dye due to the decomposition of the benzene ring. 58 As directly visualized in the photographs of the RhB solution taken during the photodegradation (inset in Fig. 5b, and more details in Fig.…”

Seeking environmentally friendly halide perovskite photocatalysts: synthesis, structure and photocatalytic performance exploration

“…In recent years, halide perovskites (HPs) have become a hot research object because they can be prepared using simple methods and have excellent photoelectric properties such as a high absorption coefficient, adjustable band gaps and a long carrier lifetime. 17,18 Nowadays, in the field of photocatalysis, HPs are widely used in pollutant degradation, 19,20 water splitting, 21,22 CO 2 reduction, 23,24 and organic synthesis. 25,26 The molecular formula of traditional three-dimensional (3D) HPs is ABX 3 .…”

Continuous synthesis of all-inorganic low-dimensional bismuth-based metal halides Cs4MnBi2Cl12 from reversible precursors Cs3BiCl6 and Cs3Bi2Cl9 under phase engineering

“…[9][10][11][12][13][14][15][16] Recently, a layered double perovskite with the formula Cs 4 MnBi 2 Cl 12 has attracted much attention due to its unique h111i-oriented crystal structure and excellent optical properties. [17][18][19][20][21] Low-dimensional metal halide perovskites and their analogues have shown great potential in applications for high-performance optoelectronic devices, including photodetectors, light-emitting diodes, fieldeffect transistors, solar cells, photocatalysts, etc. [22][23][24][25][26] It is well known that appropriate ion doping can modify the optical properties of matrix materials, and Mn 2+ , Sb 3+ , Bi 3+ , and Mn 4+ have been widely used as dopants for this purpose.…”