Shuai Gao, Meixu Han, Jinwen Pan, Yang Zhong, Hongyi Jiang
{"title":"The impact of aluminum oxide deposition on the high-temperature resistance of silica aerogels","authors":"Shuai Gao, Meixu Han, Jinwen Pan, Yang Zhong, Hongyi Jiang","doi":"10.1007/s10971-024-06547-x","DOIUrl":"10.1007/s10971-024-06547-x","url":null,"abstract":"<div><p>Silica aerogel (SA) was synthesized through the sol-gel process followed by ambient pressure drying, with aluminum-deposited silica aerogel (ASA) subsequently produced via aluminum deposition using an AlCl<sub>3</sub>·6H<sub>2</sub>O hydrolysis solution. This study examined the impact of deposition time and calcination temperature on ASA’s characteristics. Compared to the non-aluminum-deposited SA, ASA with 12 h of deposition time (ASA-12h) showcased a significant increase in specific surface area, reaching 675m<sup>2</sup> ∙ g<sup>−1</sup> at room temperature. Post-calcination at 800 °C and 1000 °C resulted in specific surface areas of 613m<sup>2</sup> ∙ g<sup>−1</sup> and 265m<sup>2</sup> ∙ g<sup>−1</sup>, respectively, markedly surpassing those of SA (240 m<sup>2</sup>∙g<sup>−1</sup> at 800 °C and 16m<sup>2</sup> ∙ g<sup>−1</sup> at 1000 °C). The results demonstrate that during the aging process, the deposited aluminum is coated by the aging solution, enabling it to remain stable and distribute uniformly. This deposition not only increases the particle size but also enhances structural stability. Furthermore, the formation of new Si-O-Al bonds improves the thermal stability of the silicon dioxide lattices. These insights pave the way for the industrial production of aerogels that are resistant to high temperatures.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"624 - 637"},"PeriodicalIF":2.3,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Faouzia Tayari, Silvia Soreto Teixeira, M. P. F. Graça, Manel Essid, Kais Iben Nassar
{"title":"Investigating structural, dielectric, and electrical characteristics of sol–gel synthesized perovskite ceramic Bi0.7Ba0.3(FeTi)0.5O3","authors":"Faouzia Tayari, Silvia Soreto Teixeira, M. P. F. Graça, Manel Essid, Kais Iben Nassar","doi":"10.1007/s10971-024-06549-9","DOIUrl":"10.1007/s10971-024-06549-9","url":null,"abstract":"<div><p>The goal of this research is to create a perovskite ceramic with electrical and dielectric properties appropriate for energy storage, medical uses, and electronic devices. A bismuth ferric titanate, Bi<sub>0.7</sub>Ba<sub>0.3</sub>(FeTi)<sub>0.5</sub>O<sub>3</sub>, doped with barium and crystalline, was effectively synthesized at the A-site via sol–gel synthesis. A rhombohedral structure emerged in the R3́C space group, which was confirmed by room-temperature X-ray studies. An average grain size of 263 nm and a homogeneous grain distribution and chemical composition were confirmed by the results of scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). The study established a clear relationship between temperature, frequency, and the electrical properties of the material. Impedance spectroscopy and electrical modulus measurements, performed in the frequency range of 1 kHz to 1 MHz and at temperatures ranging from 200 K to 360 K, demonstrated a non-Debye type of relaxation. Furthermore, once the material was produced at various temperatures, its frequency-dependent electrical conductivity was examined using Jonscher’s law. The results demonstrate that barium doping significantly improves the electrical conductivity and dielectric properties compared to pure BiFeTiO₃. Over the complete temperature range, consistent conduction and relaxation mechanisms were discovered. These findings suggest that the chemical may find widespread applicability across a broad temperature range, including electrical fields and capacitors.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"601 - 613"},"PeriodicalIF":2.3,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-024-06549-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of synthesis time on the photocatalytic performance of aggregated CuBO₂ microstructures for photo induced hazardous dye removal","authors":"Angshuman Majumdar, Sudipta Chatterjee, Arighna Basak","doi":"10.1007/s10971-024-06554-y","DOIUrl":"10.1007/s10971-024-06554-y","url":null,"abstract":"<div><p>The synthesis and characterization of novel p-type copper delafossite CuBO<sub>2</sub> microstructures were performed using an eco-friendly and cost-effective hydrothermal process. This study aims to explore the potential of these microstructures for environmental applications, specifically in the photo-induced degradation of hazardous dyes in wastewater. Various growth times were investigated to determine their influence on the morphology and photocatalytic performance of the synthesized microstructures. The characterization was carried out using X-ray diffractometer (XRD), field emission scanning electron microscope (FESEM), and transmission electron microscope (TEM). The energy dispersive X-ray (EDX) studies and UV-Vis spectrophotometer were used to analyze the optical properties and compositional purity. The synthesized CuBO<sub>2</sub> microstructures demonstrated significant photocatalytic activity, with the optimal sample synthesized in 2 h exhibiting a high degradation rate constant of 0.263 min<sup>−1</sup>, it was found that the materials synthesized for the ideal 2 h exhibited good photocatalytic activity. The results indicated that the photocatalytic activity of the CuBO₂ samples improved with increasing growth time, attributed to the enhanced crystallinity and larger surface area of the microstructures. Moreover, The findings suggest that these hierarchical microstructures have a strong potential for use in wastewater treatment applications. This work indicates that CuBO<sub>2</sub> can be a versatile and effective material for environmental remediation, highlighting its importance in developing sustainable solutions for pollution control.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"582 - 593"},"PeriodicalIF":2.3,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hongwei Yan, Taixiang Liu, Lin Huang, Ke Yang, Changpeng Li, Zhuo Zhang, Yujie Qian
{"title":"Quasi-in-situ characterization and laser damage investigation of flaws in silica antireflection coatings","authors":"Hongwei Yan, Taixiang Liu, Lin Huang, Ke Yang, Changpeng Li, Zhuo Zhang, Yujie Qian","doi":"10.1007/s10971-024-06544-0","DOIUrl":"10.1007/s10971-024-06544-0","url":null,"abstract":"<p>Silica sol-gel antireflection coatings are used in high-power lasers due to their excellent laser damage resistance. These coatings are prepared using silica nanoparticles, and flaws generated during the coating preparation process are considered one of the factors that can lead to laser damage. Ring-shape flaws of micrometer-size usually appear on the surface of silica sol-gel antireflection coating. The morphologies of these flaws were investigated through optical microscopy, contact-type surface profilometer and scanning electron microscope. The diameters of the ring-shape flaws are from several micrometers to tens of micrometers. It has been demonstrated that the ring-shape flaws are nodule-like structures containing closely packed silica nanoparticles. The quasi-in-situ laser damage tests of the coated samples show the ring-shape flaws have a low damage probability. The formation of ring-shape flaws on the silica sol-gel coating is related to the polydispersity of the colloidal silica nanoparticles. Through the analysis of the size distribution of silica nanoparticles, a mechanism for flaws formation is proposed.</p>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"594 - 600"},"PeriodicalIF":2.3,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nicolas Perciani de Moraes, Pedro Malavota Ribeiro, Bruno Henrique Baena da Silva, Tiago Moreira Bastos Campos, Gilmar Patrocínio Thim, Marcos Roberto de Vasconcelos Lanza, Liana Alvares Rodrigues
{"title":"Bi2S3 for sunlight-based Cr(VI) photoreduction: investigating the effect of sulfur precursor on its structural and photocatalytic properties","authors":"Nicolas Perciani de Moraes, Pedro Malavota Ribeiro, Bruno Henrique Baena da Silva, Tiago Moreira Bastos Campos, Gilmar Patrocínio Thim, Marcos Roberto de Vasconcelos Lanza, Liana Alvares Rodrigues","doi":"10.1007/s10971-024-06551-1","DOIUrl":"10.1007/s10971-024-06551-1","url":null,"abstract":"<div><p>This study investigated the suitability of multiple bismuth sulfide (Bi<sub>2</sub>S<sub>3</sub>) samples for the photoreduction of Cr(VI) under simulated sunlight, aiming to elucidate the effect of different sulfide sources (thiourea, thioacetamide, sodium sulfide, potassium sulfide, and ammonium sulfide) on the final structural and photocatalytic properties of this semiconductor. The sulfides were produced through simple precipitation methods, without the necessity of complex methodologies or equipment. Additionally, the effect of thermal treatment on the properties of the Bi<sub>2</sub>S<sub>3</sub> samples was also evaluated. The choice of the sulfide precursor imparted distinct characteristics onto the synthesized Bi<sub>2</sub>S<sub>3</sub>, such as distinct morphologies, specific surface areas (SSA), and crystalline structures. Notably, the efficiency of Cr(VI) photoreduction was found to be intricately linked to the adsorption capacity of Bi<sub>2</sub>S<sub>3</sub>. In this context, the calcination process emerged as a significant impediment, as it substantially diminished both the SSA and adsorption capacity of the materials. Among the sulfide sources investigated, Bi<sub>2</sub>S<sub>3</sub> synthesized using K<sub>2</sub>S exhibited superior photoreduction efficiency, attributed primarily to its remarkable adsorption capacity and rod-like morphology. The photoreduction mechanism was determined to be carried out by the direct reaction between Cr(VI) and photogenerated electrons. Regarding operational parameters, initial concentration, pH and temperature had major effects on the photoreduction efficiency; high initial concentrations led to the saturation of the active sites and lower reaction rate constants, whereas lower pHs and higher temperatures favored the photoreduction process. As for the recycle tests of the best photocatalyst, it was discovered a significant efficiency loss between cycles, which was linked to the occlusion of active sites through the formation of chrome-based species on the surface of the photocatalyst.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"568 - 581"},"PeriodicalIF":2.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huda F. Khalil, Shams A. M. Issa, Sherif G. Elsharkawy, Roya Boudaghi Malidarreh, Sara Gad, Ali Badawi, Fatma Fakhry, Hesham M. H. Zakaly
{"title":"Advancing ZMF-spinel ferrites with Gd3+ doping: structural, magneto-optical enhancements, and superior gamma-ray shielding for high-tech applications","authors":"Huda F. Khalil, Shams A. M. Issa, Sherif G. Elsharkawy, Roya Boudaghi Malidarreh, Sara Gad, Ali Badawi, Fatma Fakhry, Hesham M. H. Zakaly","doi":"10.1007/s10971-024-06520-8","DOIUrl":"10.1007/s10971-024-06520-8","url":null,"abstract":"<div><p>In this investigation, the incorporation of Gd<sup>3+</sup> ions into ZMF-spinel ferrites through the citrate sol-gel auto-combustion method significantly modified their structural, magneto-optical, and gamma-ray attenuation properties. Doping levels were varied across samples labeled ZMF0 to ZMF4 with Gd3+ concentrations ranging from 0.000 to 0.100. Advanced characterization techniques such as XRD, SEM, TEM, FT-IR, Raman spectroscopy, and XPS, alongside UV-vis spectroscopy and VSM measurements, highlighted the profound impact of Gd<sup>3+</sup> doping. Notably, the incorporation of Gd<sup>3+</sup> led to nano-sized cubic structures with an optimized crystallite size of 19.82 nm in the ZMF4 sample, and a notable reduction in the band gap from 3.21 eV to 2.99 eV was observed, indicative of enhanced electronic properties. Magnetic analysis revealed a transition towards superparamagnetic behavior, with a decrease in coercivity and squareness ratios, suggesting applications in areas such as data storage and optical waveguides. Furthermore, the study leveraged FLUKA Monte Carlo simulations to assess the gamma-ray shielding efficiency of these materials. It was found that increasing Gd<sup>3+</sup> concentration or sample thickness markedly improved radiation attenuation, highlighting the material’s enhanced shielding capabilities against a range of photon energies. The most significant findings included the optimized sample (ZMF4) displaying superior magneto-optical characteristics and outstanding gamma-ray shielding performance, especially at higher Gd<sup>3+</sup> levels. This investigation underlines the critical role of Gd3+ doping in advancing the functional properties of ZMF-spinel ferrites for technological and radiation protection applications, showcasing the potential of tailored nanomaterials in addressing complex challenges in material science.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 3","pages":"898 - 921"},"PeriodicalIF":2.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The crucial role of hydroxyethyl methacrylate in the sintering of fused silica glass using ultraviolet-cured silica nanoparticle slurries: dispersing nanoparticles","authors":"Youwang Hu, Guilin Wang, Qinglong Zhang, Xiaoyan Sun, Haikuan Chen","doi":"10.1007/s10971-024-06540-4","DOIUrl":"10.1007/s10971-024-06540-4","url":null,"abstract":"<div><p>Fused silica glass is prepared by dispersing silica nanoparticles (SiNPs) through the hydroxyethyl methacrylate (HEMA). The dispersion of SiNPs was characterized using transmission electron microscopy and small angle X-ray scattering. The rheological properties and functional groups of SiNP slurries were analyzed utilizing a rotational rheometer and fourier transform infrared spectroscopy. The sintering quality of the fused silica glass was characterized through scanning electron microscopy and X-ray diffraction. The research results show that HEMA adsorbs on the surface of SiNP through hydrogen bonding to form a solvation layer of a certain thickness, thereby hindering the agglomeration of SiNPs. The SiNP slurry system exhibits bi-fractal properties. The viscosity and shear stress of the SiNP slurry initially decrease and then increase with increasing HEMA content. Achieving a homogeneous dispersion of SiNPs in the slurry is essential for sintering high-quality silica glass. The internal voids of agglomerates are the origin of crack formation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"553 - 567"},"PeriodicalIF":2.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Batch adsorption of Fe3+ ions from aqueous solutions using activated carbon derived from Horse Chestnut Shells found in Northwestern Himalayas: Equilibrium, kinetic and thermodynamic studies","authors":"Uzma Imtiyaz, Mushtaq Ahmad Rather","doi":"10.1007/s10971-024-06546-y","DOIUrl":"10.1007/s10971-024-06546-y","url":null,"abstract":"<div><p>This research paper analyses the adsorbent properties of a unique biomass i.e. horse chestnut shell (<i>Aesculus hippocastanum L</i>) activated carbon synthesized by chemical activation of KOH produced under optimized carbonization conditions for Fe<sup>3+</sup>. Research was done to look into the characteristics of the made activated carbon and its systematic effects of process parameters. Characterizations like SEM, BET, FTIR, XRD, TGA, EDX, proximate and ultimate analysis, calorific value was performed. Also effect of process parameters like initial Fe<sup>3+</sup> ion content, contact time, dosage and temperature of system was studied for mechanism of adsorption at pH (6) of Fe<sup>3+</sup> in an aqueous solution. Data on equilibrium and kinetic isotherms from experiments were examined, for kinetics pseudo 1st order reaction, pseudo 2nd order reaction and intraparticle diffusion has been utilised. System was fairly fitted by pseudo-2nd-order reaction. Adsorption isotherms such as Halsey, Harkin Jura, Temkin, Freundlich, and Langmuir and Dubinin Radushkevich were used and Langmuir adsorption isotherm turned out best suitable match as R<sup>2</sup> value was found out to be 0.99. The maximum Fe<sup>3+</sup> adsorbing ability of the HCAC4 was 138.88 mg/g at 25 °C. Thermodynamical evaluation concluded the process to be spontaneous and heat-releasing.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"533 - 552"},"PeriodicalIF":2.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sumia Rubab, Sarah A. Alsalhi, A. Dahshan, Muhammad Aslam, Khursheed Ahmad, Albandari.W. Alrowaily
{"title":"Fabrication of SrSnO3/rGO composite via hydrothermal technique as robust electrocatalyst for OER process","authors":"Sumia Rubab, Sarah A. Alsalhi, A. Dahshan, Muhammad Aslam, Khursheed Ahmad, Albandari.W. Alrowaily","doi":"10.1007/s10971-024-06521-7","DOIUrl":"10.1007/s10971-024-06521-7","url":null,"abstract":"<div><p>Developing effective and durable electrocatalysts for long-term energy conversion technologies is still an ongoing problem for researchers. For this purpose, perovskite oxides have attracted significant interest as effective electrocatalysts for oxygen evolution reactions (OER) in response to their highly adjustable catalytic and electrical properties associated with their compositions. This study presents a novel hydrothermal approach to fabricate SrSnO<sub>3</sub>/rGO composite in order to accelerate the four electron transfer mechanisms. Moreover, the physical analyses show that cubic-shaped SrSnO<sub>3</sub> are irregularly dispersed in the form of spherical on the nanosheets of rGO. Compared with pristine, the BET study shows that composite exhibits a greater surface area (59 m<sup>2</sup> g<sup>−1</sup>). To evaluate the catalytic kinetics, conductivity and stability, the electrochemical evaluation of the electrode material (SrSnO<sub>3</sub>/rGO) was performed in alkaline media with Ni foam (NF) as substrate. The exceptional electrocatalytic performance of the material in the OER could be associated with its unique structure, many active sites, and favorable conductivity. This performance is characterized by fast reaction rates, as indicated by a minimal Tafel constant (33 mV dec<sup>−1</sup>) along with reduced overpotential (199 mV) at 10 mA cm<sup>−2</sup>. Moreover, the chronoamperometry (CA) investigation of the SrSnO<sub>3</sub>/rGO composite indicates 35 h of long-term stability. This study presents a viable approach for producing high-performing perovskite composites for effective OER electrocatalysis.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 3","pages":"885 - 897"},"PeriodicalIF":2.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metal alkoxides as models for metal oxides—the concept revisited","authors":"Vadim G. Kessler","doi":"10.1007/s10971-024-06548-w","DOIUrl":"10.1007/s10971-024-06548-w","url":null,"abstract":"<div><p>Sol-Gel synthesis of metal oxides constitutes a tremendously exciting domain of inorganic chemistry, where molecular and supramolecular science meet the physical chemistry and materials science. Structure and reactivity, especially surface complexation of biologically important molecules on the surface of metal oxide nanoparticles can efficiently be traced through structural studies of metal oxo-paperbags—the product of partial hydrolysis of alkoxide precursors. Paperbag is a recently proposed term to denote oligonuclear complexes not featuring intrinsic metal-metal bonding and thus not qualified to be called “clusters”. Another important insight, provided recently by the studies of heterometallic species, is dealing with visualization of bonding modes of single atom catalysts on metal oxide substrates and reveals possible coordination environments of heteroatoms on doping. The studies of large paperbag aggregates can contribute to understanding of factors influencing the bandgap and photocatalytic activity of related oxides. The use of these species directly as photo or electro catalysts is rather debatable, however, in the view of high reactivity of these alkoxide intermediates, easily transforming them into metal oxide nanoparticles on hydrolysis or thermolysis.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 2","pages":"502 - 511"},"PeriodicalIF":2.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-024-06548-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}