Unveiling the role of structure–property correlation and its validation towards engineering the application potential of sol–gel derived mesoporous gamma-alumina,Molecular Systems Design & Engineering

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Unveiling the role of structure–property correlation and its validation towards engineering the application potential of sol–gel derived mesoporous gamma-alumina
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-10-13 , DOI: 10.1039/d1me00102g
Savan Kumar Sharma ₁ , Paromita Das ₁ , Barun K. Sanfui ₁

Affiliation

In the present study, a comprehensive investigation has been carried out on the meticulously designed surfactant-free glycerol-activated sol–gel derived mesoporous γ-alumina powder, specifically with the aim to establish the excellent prospect of the structure–property relationship towards efficiently modifying and conceptually emphasizing the correlative outlook of the application perspective. Herein, the systematic engineering of the selective synthetic parameters such as peptizing acid type and its associated solvent create great strategic influence towards methodically tuning and judiciously constructing the prime controlling facet of the overall process, which successively maintains the distinctive individuality of the sol–gel derived mesoporous gamma-alumina structure. Interestingly, the initiation of discrepancy, which was recorded at the chemical nature site of the molecular bond structure of two distinctive boehmite sols, conspicuously maintains their individuality even while experiencing the sequential advancement of the dehydroxylation process, the consequential rearrangement of the hydroxyl group, alongside the concurrent progressive diffusion of Al³⁺ ion amongst the available co-ordination sites as a function of increasing temperature. Eventually, while dictating the individual identity of the evolved gamma-alumina's structure, the study aimed at acquiring identical distinctive characteristics even at their corresponding atomic scale, bulk structure, and surface textural features in terms of revealing the Rietveld, NMR (²⁷Al and ¹H), pyridine-FTIR, TEM, and XPS spectral analysis with the exploration of comparatively higher crystallinity, greater AlO₄/AlO₆ ratio, lower Lewis and Brønsted acid sites, lesser amount of hydroxyl groups, and lower extent of agglomeration tendency in inorganic acid peptized gamma-alumina as compared to organic acid peptized gamma-alumina, which thereafter showed concrete interconnectivity by concluding with the proper demonstration of the surface area, pore morphology, and band gap study. Finally, the study presented a detailed mechanistic view with the aim to further exemplify the real-time prospect of the structure–property relationship of the two differently synthesized gamma-alumina samples in terms of categorizing the application potential, particularly in identical dye adsorption and photocatalyst fields, and consecutively building a robust scientific and technological perspective of the structure–property-performance inter-connective linkage beyond the existing limiting factor.

中文翻译：

揭示结构-性能相关性的作用及其对溶胶-凝胶衍生介孔γ-氧化铝工程应用潜力的验证

在本研究中，对精心设计的无表面活性剂甘油活化溶胶-凝胶衍生介孔γ-氧化铝粉体进行了全面的研究，特别是旨在建立结构-性能关系对有效改性的良好前景。并在概念上强调应用视角的相关前景。在此，选择性合成参数（如胶溶酸类型及其相关溶剂）的系统工程对有条不紊地调整和明智地构建整个过程的主要控制方面产生了巨大的战略影响，从而连续保持了溶胶-凝胶衍生的独特个性介孔γ-氧化铝结构。有趣的是，差异的开始，可用配位点中的³⁺离子随温度升高而变化。最终，在确定演化出的 γ-氧化铝结构的个体特性的同时，该研究旨在获得相同的独特特征，即使在它们相应的原子尺度、体积结构和表面纹理特征方面，也能揭示 Rietveld、NMR（²⁷ Al 和¹ H)、吡啶-FTIR、TEM 和 XPS 光谱分析，探索相对较高的结晶度、更大的 AlO₄ /AlO₆与有机酸胶溶的 γ-氧化铝相比，无机酸胶溶的 γ-氧化铝具有较低的路易斯和布朗斯台德酸位点、较少量的羟基和较低的团聚倾向程度，随后通过适当证明表面积、孔形态和带隙研究。最后，该研究提出了详细的机理观点，旨在进一步举例说明两种不同合成γ-氧化铝样品在应用潜力分类方面的结构-性能关系的实时前景，特别是在相同的染料吸附和光催化剂方面。领域，

更新日期：2021-11-24

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