A g-CN/rGO/CsBiBr mediated Z-scheme heterojunction for enhanced photocatalytic CO reduction.

Photocatalytic CO reduction plays a crucial role in advancing solar fuels, and enhancing the efficiency of the chosen photocatalysts is essential for sustainable energy production. This study demonstrates advancements in the performance of g-CN as a photocatalyst achieved through surface modifications such as exfoliation to increase surface area and surface oxidation for improved charge separation. We also introduce reduced graphene oxide (rGO) in various ratios to both bulk and exfoliated g-CN, which effectively mitigates charge recombination and establishes an optimal ratio for enhanced efficiency.

Shape-Controlled Synthesis of CuTeO Nanoparticles with Photocatalytic Features.

CuTeO (CTO) has been synthesized by hydrothermal synthesis applying different pH values without any template or a calcination step to control the crystalline phase and the morphology of nanoparticles. The physicochemical properties characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, N adsorption, X-ray photoelectron spectroscopy, and diffuse reflectance ultraviolet-visible (DRUV-vis) spectroscopy techniques revealed that the pH values significantly influence the crystal growth. In acidic media (pH = 2), crystal growth has not been achieved.

CsBiBr/g-CN Direct Z-Scheme Heterojunction for Enhanced Photocatalytic Reduction of CO to CO.

Lead-free halide perovskite derivative CsBiBr has recently been found to possess optoelectronic properties suitable for photocatalytic CO reduction reactions to CO. However, further work needs to be performed to boost charge separation for improving the overall efficiency of the photocatalyst. This report demonstrates the synthesis of a hybrid inorganic/organic heterojunction between CsBiBr and g-CN at different ratios, achieved by growing CsBiBr crystals on the surface of g-CN using a straightforward antisolvent crystallization method.

Scalable All-Inorganic Halide Perovskite Photoanodes with >100 h Operational Stability Containing Earth-Abundant Materials.

The application of halide perovskites in the photoelectrochemical generation of solar fuels and feedstocks is hindered by the instability of perovskites in aqueous electrolytes and the use of expensive electrode and catalyst materials, particularly in photoanodes driving kinetically slow water oxidation. Here, solely earth-abundant materials are incorporated to fabricate a CsPbBr -based photoanode that reaches a low onset potential of +0.4 V and 8 mA cm photocurrent density at +1.

A Review on Halide Perovskite-Based Photocatalysts: Key Factors and Challenges.

A growing number of research articles have been published on the use of halide perovskite materials for photocatalytic reactions. These articles extend these materials' great success from solar cells to photocatalytic technologies such as hydrogen production, CO reduction, dye degradation, and organic synthesis. In the present review article, we first describe the background theory of photocatalysis, followed by a description on the properties of halide perovskites and their development for photocatalysis.

Silver-Decorated TiO Inverse Opal Structure for Visible Light-Induced Photocatalytic Degradation of Organic Pollutants and Hydrogen Evolution.

TiO inverse opal (TIO) structures were prepared by the conventional wet chemical method, resulting in well-formed structures for photocatalytic activity. The obtained structures were functionalized with liquid flame spray-deposited silver nanoparticles (AgNPs). The nanocomposites of TIO and AgNPs were extensively characterized by various spectroscopies such as UV, Raman, X-ray diffraction, energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy combined with microscopic methods such as scanning electron microscopy, transmission electron microscopy (TEM), and high-resolution TEM.

Multilayer TiO Inverse Opal with Gold Nanoparticles for Enhanced Photocatalytic Activity.

Three-dimensional highly ordered multilayer titanium dioxide (TiO) inverse opal (TIO) structures with two pore sizes were fabricated over a large surface using a self-convective method. The fabricated TIO multilayers were functionalized with gold nanoparticles (AuNPs) by immersing the samples in solution with gold nanoparticles. The photocatalytic activity of TiO was enhanced by 85% via plasmonic activation of AuNPs that increased the lifetime of photogenerated holes and electrons.