To reveal the mechanism of photocatalytic performance enhancement, femtosecond transient absorption spectroscopy (fs-TAS) is used to monitor the electron quenching dynamics within ZnO. For pure ZnO, two electron quenching pathways are available, including interband recombination and trap state-induced recombination of photogenerated carriers.

2023年7月28日 · Here we show that chiral structure in ZnO can induce spin selectivity effect to promote photocatalytic performance. The ZnO crystals synthesized using chiral methionine molecules as...

2024年11月15日 · Photocatalytic oxidative coupling of methane with oxygen is promising to obtain valuable muti-carbon products, yet suffering low reactivity. Here, we apply cerium modifications on zinc...

2023年5月30日 · Results from the optical, electrochemical and fs-TAS analysis corroborated the efficient generation, separation, and transportation of the charge carriers in ZnO@SA-Co-CN. Experimental and theoretical calculations confirmed that the Co−N 4 sites in ZnO@SA-Co-CN have higher intrinsic catalytic activity than that in the pure SA-Co-CN in PMS ...

2024年11月20日 · F– 在库仑力作用下吸附在 ZnO 表面，显著提高了 ZnO 的光催化 H2O2 生产性能，最高效率为 4137.2 μmol·g–1·L–1·h–-1.通过飞秒瞬态吸收光谱 （fs-TAS） 测量从电子转移动力学的角度解释了 ZnO/F 的光催化性能增强机制。

2020年12月1日 · The as-fabricated CTS/ZnO based triboelectric acetone sensor (CTS/ZnO-TAS) exhibited higher sensitivity (1.9545%/ppm), superior response (19.02% under 10 ppm of acetone) and lower detection limit (1 ppm) than the CTS-TAS under 89.3%RH.

2022年9月15日 · The S-scheme heterojunction between ZnO and TpPa-Cl contributes to enhanced light absorption, promoted reactant adsorption capacity, increased redox power, and efficient separation and transfer of photogenerated charge carriers, leading to an improved photocatalytic H 2 O 2 evolution activity.

Herein, transient absorption spectroscopy (TAS) revealed a small Stokes shift of ∼180 meV between the GE-centers (located at ∼0.7 eV above the valence band) and the GE peak — yielding the first experimental evidence of the GE originating from charge transitions of the ZnO di-vacancies proposed recently in density functional calculations.

2024年11月1日 · Doping of zinc oxide (ZnO) with manganese (Mn) tunes midbandgap states of ZnO to enhance its optical properties and makes it into an efficient photoactive material for photoelectrochemical...

2024年2月7日 · In this study, we demonstrate a synthetic route to yield colloidal ZnO quantum dots (QD) via an enhanced sol–gel process that effectively eliminates the residual intermediate reaction molecules, which would otherwise weaken the excitonic emission.