Bismuth‐Based Oxide Photocatalysts for Selective Oxidation Transformations of Organic Compounds

Abstract

Selective oxidation of organic compounds is incredibly important in the production of a broad range of important chemicals. As such, these reactions attract a great deal of research attention, particularly where conventional synthesis uses harsh and corrosive reaction conditions. To decrease energy consumption, improve yields and mitigate environmental impacts, heterogeneous photocatalysis has emerged as a green and facile method, where its attractiveness is due to promises of providing low toxicity and low‐cost routes, driven by renewable energy. Among various semiconductor photocatalysts, bismuth‐based oxides are particularly promising candidates due to their high chemical and thermal stability, environmental friendliness, and good visible light responses. This paper provides a comprehensive overview of bismuth‐based oxide photocatalysts as employed in selective organic synthesis, including reaction mechanisms, with a particular focus on the reactive oxygen species involved. In addition, detailed information on the bismuth‐based oxide materials used as photocatalysts is covered. This includes crystal and electronic structures, strategies for improving photocatalytic performance, and a comparison of photocatalytic performances for key organic reactions. Furthermore, prospects and challenges of bismuth‐based oxide photocatalysts in selective organic synthesis are discussed, to aid future developments of efficient photocatalytic materials.

Visible light photocatalytic NOx removal with suppressed poisonous NO2 byproduct generation over simply synthesized triangular silver nanoparticles coupled with tin dioxide

“…Among the current strategies, semiconductor photocatalysis is considered a promising and sustainable solution because it uses limitless solar light as the input energy source and does not require harsh temperature and pressure conditions. [2][3][4][5][6][7][8][9][10] In addition, in photocatalytic NO removal, simultaneous toxic NO 2 conversion and green product (NO 3 − ) selectivity are also worth considering along with the NO removal efficiency. 11,12 Hence, it is vital to nd a promising catalyst system that can meet these requirements.…”

Tuning Catalytic Activity and Selectivity in Photocatalysis on Mie-Resonant Cuprous Oxide Particles: Distinguishing Electromagnetic Field Enhancement Effect from the Heating Effect

“…In that vein, plasmonic photocatalysis has emerged as a promising approach in which photons are used as means to tune the catalytic activity. ,,− In this approach, nanostructures built on light-absorbing plasmonic metal nanostructures (PMNs) are used as catalysts. The PMNs (e.g., Ag, Au, and Cu) exhibit an optical phenomenon called plasmonic Mie resonance that is typically in the visible and infrared regions of the electromagnetic spectrum. ,,, At plasmonic Mie resonance frequencies, there is a significant enhancement in the light–matter interaction, resulting in the generation of high electric fields as well as absorption (i.e., excited electron–hole pairs) and scattering in/from the nanostructures. , Numerous reports in the past decade have shown that the energetic charge carriers created in the PMNs can be utilized to control and tune the catalytic activity. ,,− However, the reports on the demonstration of tunable product selectivity toward the desired chemical reaction pathway are rather limited, ,− and it remains a challenge in the field to rationally design and demonstrate tunable selectivity on PMN-based catalysts. , Also, major disagreements and controversies have emerged in recent years on distinguishing the desired plasmonic Mie resonance-mediated electronic and electromagnetic field effects in photocatalysis from the undesired light-induced heating effect. − The main reason for this issue is that most of the temperature measurements reported on the plasmonic Mie resonator catalysts are based on macroscopic and ensemble measurements. , To alleviate this issue, local temperature measurement using a nanothermometry technique on a single particle level is desired. , …”

Catalytic Degradation of Triphenylmethane Dyes with an Iron Porphyrin Complex as a Cytochrome P450 Model

“…Moreover, this physical disposal method is affected by the environment and cannot completely decompose or remove waste [ 8 , 9 , 10 ]. Photocatalytic oxidation is considered an emerging technology used to remove organic pollutants [ 3 , 11 , 12 ]. For example, crosslinked gelatin/CuS/PVA nanocomposites have proven to be effective and convenient photocatalysts for removing RhB dye from wastewater under solar irradiation [ 3 ].…”