Fabricating a Z-Scheme Heterojunction of CTF@Cs3Sb2Br9 Nanocomposites for Enhanced and Selective Photocatalytic Oxidation of Benzyl Alcohol

IF 4.7 2区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Pub Date : 2025-02-28 DOI:10.1021/acs.inorgchem.4c0528410.1021/acs.inorgchem.4c05284

Chunyu Zhao, Wei Xiong, Jinyang Luo, Weiyi Ouyang*, Chengyu Shi, Ying Zhou, Gang Chang and Aizhao Pan*,

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引用次数: 0

Abstract

The selective oxidation of benzyl alcohols to the corresponding aldehydes is a highly desirable transformation, but significant challenges remain. Herein, we report a simultaneous-promotion strategy for redox capacities that involves the fabrication of an environmentally friendly, lead-free Cs₃Sb₂Br₉ nanocrystals (NCs)-based Z-scheme heterojunction. Cs₃Sb₂Br₉ NCs were grown on covalent triazine framework (CTF) nanosheets through ligand-assisted reprecipitation. The resulting CTF@Cs₃Sb₂Br₉ consisted of homogeneous Cs₃Sb₂Br₉ NCs (15 nm) attached to the surface of the CTF. Importantly, the nanocomposite significantly enhanced the spatial charge separation, thereby resulting in unprecedented photocatalytic efficiency and selectivity in the oxidation of benzyl alcohol. Especially, CTF@Cs₃Sb₂Br₉ exhibited 100% selectivity and up to 66.4% conversion of benzaldehyde in the photocatalytic oxidation of benzyl alcohol under ultraviolet light illumination. These results significantly exceed previously reported selectivity and conversions in benzyl alcohol oxidation reactions and therefore broaden the photocatalytic applications of environmentally friendly lead-free perovskite-based photocatalysts.

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用于苯甲醇增强和选择性光催化氧化的CTF@Cs3Sb2Br9纳米复合材料Z-Scheme异质结的制备

苯甲醇选择性氧化为相应的醛是一种非常理想的转化，但仍然存在重大挑战。在此，我们报告了一种同时促进氧化还原能力的策略，该策略涉及制造一种环境友好，无铅的基于Cs3Sb2Br9纳米晶体（NCs）的z -图式异质结。采用配体辅助再沉淀法在共价三嗪框架（CTF）纳米片上生长Cs3Sb2Br9纳米细胞。所得CTF@Cs3Sb2Br9由均匀的Cs3Sb2Br9 NCs （15 nm）组成，附着在CTF表面。重要的是，纳米复合材料显著增强了空间电荷分离，从而在苯甲醇氧化中产生了前所未有的光催化效率和选择性。尤其在紫外光照射下，CTF@Cs3Sb2Br9光催化氧化苯甲醇的选择性为100%，苯甲醛转化率高达66.4%。这些结果大大超过了先前报道的苯甲醇氧化反应的选择性和转化率，因此拓宽了环境友好型无铅钙钛矿基光催化剂的光催化应用。

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来源期刊

Inorganic Chemistry 化学-无机化学与核化学

CiteScore

7.60

自引率

13.00%

发文量

1960

审稿时长

1.9 months

期刊介绍： Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.