Synthesis Of Related Materials Research Articles

Photothermal synergistic catalytic reactions: g-C3N4 assisted CeO2 for efficient selective aromatic alcohol oxidation

This paper investigates the enhanced effect of photothermal synergistic catalytic reactions and demonstrates this effect using CeO2 as an example. The experimental results demonstrate that CeO2 exhibits remarkable ability to efficiently harness both light and thermal energy for catalytic reactions, which can achieve the enhanced effect of photothermal synergistic catalytic reaction. The effect of photothermal co-catalysis is significantly greater than the simple algebraic sum of photocatalysis and thermal catalysis. Furthermore, by incorporating other materials such as g-C3N4, the photothermal catalytic performance of CeO2 can be further enhanced. Specifically, under visible light irradiation and a stable temperature of 363.15 K, the yield and selectivity of 50% CeO2/g-C3N4 (50% COCN) catalyst for the oxidation of benzyl alcohol to benzaldehyde reached 56.9% and 99%, respectively. Based on characterization and theoretical calculations, a possible mechanism of photothermal co-catalysis was proposed. This study provides a new idea for the implementation of photothermal synergistic catalytic reaction and provides a reference for the design and synthesis of related materials.

(Invited) Atomically Thin Two-Dimensional Organic-Inorganic Hybrid Perovskites

Intense research efforts have focused on two-dimensional (2D) materials in the last decade. Layered organic-inorganic hybrid perovskites, which were discovered more than 20 years ago and have proved to be promising semiconductor materials, have not been made into atomically thin sheets and investigated so far. In this talk, we report the solution-phase growth of single and few unit-cell-thick single crystalline 2D hybrid perovskites of (C4H9NH3)2PbBr4 with well-defined square shape and large size. In contrast to other 2D materials, the hybrid perovskite sheets exhibit an unusual structural relaxation, and this structural change leads to a band gap shift compared to the bulk crystal. The high quality 2D crystals exhibit efficient photoluminescence, and color tuning could be achieved by changing sheet thickness as well as composition via the synthesis of related materials. This study opens up the possibility of fundamental research into the synthesis and properties of atomically thin 2D hybrid perovskites, and introduces a new family of 2D semiconductors for nanoscale optoelectronic devices.