化学定制金属醇盐作为工程氧化物纳米结构单源前体的研究进展

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS
Ajay Saini , Dalip Singh , Pushpendra Kumar , K.K. Nagaraja
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引用次数: 0

摘要

金属氧化物纳米结构由于其广泛的实际应用,在化学、物理和材料科学等多个领域具有重要意义。氧化物广泛应用于各种技术应用,包括传感器、压电器件、微电子电路、涂料、催化剂和太阳能电池的生产。由于它们的小尺寸,氧化物纳米颗粒表现出特殊的物理和化学特性。利用单源前驱体技术作为一种可行的纳米材料合成方法显示出潜力。但是,它的成功实施需要有适当定制的前体。化学改变的金属/杂金属烷氧化物有望成为制备纳米级原始金属/杂金属氧化物的前驱体材料。由于这些前驱体能够调节溶胶-凝胶和喷雾热解过程中的前驱体反应活性,以及促进无机-有机杂化材料的生产,因此它们在合成新材料方面具有重要的潜力。使用溶胶-凝胶方法已经实现了从纳米棒(~ 100 nm)到纳米线的SnO2微结构,并产生了纳米氧化铝(Al2O3)粒径范围从30 nm到7 nm,具体取决于改性程度。醇氧基的改性可以通过与螯合配体交换醇氧基来实现,如席夫碱、肟、乙二醇、羧酸和其他类似化合物。所讨论的螯合配体在分子水平上对醇酮前体产生影响,从而从整体上改变水解-缩合过程。因此,它们充当指导结构和控制最终产物大小的代理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Advances in chemically tailored metal alkoxide as single-source precursors for engineered oxide nanostructures
Metal oxide nanostructures are of significant importance in several fields such as chemistry, physics, and materials science due to their diverse range of practical applications. Oxides are extensively utilized in various technical applications, including the production of sensors, piezoelectric devices, microelectronic circuits, coatings, catalysts, and solar cells. Owing to their small size, oxide nanoparticles exhibit special physical and chemical characteristics. The utilization of the single-source precursor technique exhibits potential as a viable method for the synthesis of nanoscale materials. However, its successful implementation necessitates the availability of appropriately customized precursors. Chemically altered metal/hetero-metal alkoxides exhibit promise as viable precursor materials for the fabrication of pristine metal/hetero-metal oxides at the nanoscale. These precursors have significant potential for the synthesis of new materials due to their ability to regulate precursor reactivity in sol-gel and spray pyrolysis processes, as well as facilitate the production of inorganic-organic hybrid materials. Microstructures ranging from nano-rods (∼100 nm) to nanowires of SnO2 have been realized using the sol-gel method and have generated nano-alumina (Al2O3) particle sizes ranging from 30 nm to 7 nm, depending on the degree of modification. The modification of alkoxides can be achieved by the exchange of alkoxy groups with chelating ligands, such as Schiff's bases, oximes, glycols, carboxylic acids, and other similar compounds. The chelating ligands in question exert their influence on the alkoxide precursor at a molecular level, so altering the hydrolysis-condensation process as a whole. Consequently, they serve as agents that direct the structure and govern the size of the resulting product.
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来源期刊
Open Ceramics
Open Ceramics Materials Science-Materials Chemistry
CiteScore
4.20
自引率
0.00%
发文量
102
审稿时长
67 days
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