Size and Crystallinity-Dependent Photocatalytic Performance of MIL-53(Fe) and MIL-53(Fe)/g-C3N4 Composite

IF 3.7 2区化学 Q2 CHEMISTRY, APPLIED Applied Organometallic Chemistry Pub Date : 2024-12-10 DOI:10.1002/aoc.7921

Anran Zhu, Qing Yuan, Peipei Xiao, Mingzhu Liu, Longfeng Li

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Abstract

MIL-53(Fe) is a novel photocatalytic material that has been developed over the past decade; however, significant efforts are still required to fully optimize its photocatalytic performance in order to meet the requirements of practical applications. In this paper, we investigated the effects of size and crystallinity on the photocatalytic performance of MIL-53(Fe) and its composites x-MIL-53(Fe)/g-C₃N₄ (x-MIL-Fe/CN). During the hydrothermal synthesis process, the control over particle size was achieved by adjusting the amount of acetic acid (HAc). Ball milling was utilized to manipulate both the size and crystallinity of MIL-53(Fe). Photocatalytic experiments demonstrated that MIL-53(Fe) and 15-MIL-Fe/CN, characterized by the smallest particle sizes and great crystallinity, exhibited the highest photocatalytic activity. This enhancement in photocatalytic activity can be attributed to the reduced band gap and lower recombination rate of photogenerated carriers. Notably, the hydrogen evolution rate for 15-MIL-Fe/CN reached up to 4950 μmol·g⁻¹·h⁻¹, but MIL-53(Fe) achieved a 98% degradation of methyl orange within 60 min.

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MIL-53(Fe) 和 MIL-53(Fe)/g-C3N4 复合材料的光催化性能与结晶度有关

MIL-53（Fe）是近十年来发展起来的一种新型光催化材料；但是，为了满足实际应用的要求，其光催化性能还需要充分优化。本文研究了MIL-53（Fe）及其复合材料x-MIL-53(Fe)/g-C3N4 （x-MIL-Fe/CN）的尺寸和结晶度对其光催化性能的影响。在水热合成过程中，通过调节乙酸（HAc）的用量来实现对粒径的控制。采用球磨法对MIL-53（Fe）的晶粒尺寸和结晶度进行了控制。光催化实验表明，MIL-53（Fe）和15-MIL-Fe/CN具有粒径最小、结晶度大的特点，具有最高的光催化活性。这种光催化活性的增强可归因于光生成载流子的带隙减小和复合率降低。值得注意的是，15-MIL-Fe/CN的析氢速率高达4950 μmol·g−1·h−1，而MIL-53（Fe）在60 min内对甲基橙的降解率达到98%。

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来源期刊

Applied Organometallic Chemistry 化学-无机化学与核化学

CiteScore

7.80

自引率

10.30%

发文量

408

审稿时长

2.2 months

期刊介绍： All new compounds should be satisfactorily identified and proof of their structure given according to generally accepted standards. Structural reports, such as papers exclusively dealing with synthesis and characterization, analytical techniques, or X-ray diffraction studies of metal-organic or organometallic compounds will not be considered. The editors reserve the right to refuse without peer review any manuscript that does not comply with the aims and scope of the journal. Applied Organometallic Chemistry publishes Full Papers, Reviews, Mini Reviews and Communications of scientific research in all areas of organometallic and metal-organic chemistry involving main group metals, transition metals, lanthanides and actinides. All contributions should contain an explicit application of novel compounds, for instance in materials science, nano science, catalysis, chemical vapour deposition, metal-mediated organic synthesis, polymers, bio-organometallics, metallo-therapy, metallo-diagnostics and medicine. Reviews of books covering aspects of the fields of focus are also published.