Transparent ultrathin SiO2 nanowire aerogel displaying novel properties when interacting with water: A promising versatile functional platform

He, Jingbo; Ma, Churong; Yang, Jin; Zou, Xiaobin; Sun, Bo; Sun, Yingjuan; Wang, Chengxin

doi:10.1016/j.fmre.2022.01.019

Cited by 9 publications

(4 citation statements)

References 38 publications

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“…As presented in Figure a, with no load applied, the inorganic/glucan hybrid aerogels exhibit a slightly improved DI water absorption capacity when compared to aerogels based on neat glucan. The TiO 2 /glucan aerogel displays a superior absorption capacity when compared to the neat glucan, MgO/glucan, and CaO/glucan aerogels due to its larger surface area, higher pore volume, and stronger mechanical strength coupled with the superior hydrophilicity of the hybrid systems , (Figure S14). The water uptake performance observed is comparable to other polymers reported in the literature (Table S5).…”

Section: Resultsmentioning

confidence: 99%

Enzymatic Polysaccharide-Based Aerogel Absorbents for Sustainable Personal Hygiene Applications

Rasaki,

Lenges,

Behabtu

et al. 2024

ACS Sustainable Chem. Eng.

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Polysaccharide-based aerogels have attracted attention as sustainable alternatives for absorbent products in personal hygiene. They present greener alternatives to the commonly used polyacrylates and meet the requirements of biodegradability, biocompatibility, and a more benign hazard potential. The polysaccharide utilized in this study is α-1,3-glucan produced via the enzymatic polymerization of glucose from sucrose. Here, we investigate cross-linking of the glucan with various inorganics to produce hybrid aerogels with three-dimensional (3D) interwoven microstructures, superior structural integrity, and fluid absorption capacity suitable for personal hygiene applications. We capitalize on the narrow solubility window of the glucan under alkaline conditions and prepare precursor hydrogels via a simple, acid-assisted precipitation method. The inclusion of inorganics (MgO, CaO, and TiO 2 ) during the neutralization step enhances the mechanical strength of the hybrid hydrogels which are converted subsequently to aerogels in a freeze-drying process. These hybrid aerogels, namely, TiO 2 /glucan, CaO/glucan, and MgO/glucan, display improved yield stress doubling that of the aerogel derived directly from glucan and higher absorption capacity toward deionized water in two different sorption experiments (with and without load). For commercially relevant hygiene applications, the absorption capacities of the aerogels toward model urine and menstrual fluids are assessed, and the absorption capacities of the TiO 2 /glucan hybrid aerogels are on par with commercial diapers and surpass sanitary pads due to the interplay of the glucan neutral charge and favorable hierarchical structure that enables effective uptake of the fluids. These findings indicate that the inorganic/glucan-based aerogels hold promise as viable sustainable alternatives to absorbents used in commercial hygiene applications such as sanitary pads and diapers.

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Section: Resultsmentioning

confidence: 99%

Enzymatic Polysaccharide-Based Aerogel Absorbents for Sustainable Personal Hygiene Applications

Rasaki,

Lenges,

Behabtu

et al. 2024

ACS Sustainable Chem. Eng.

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“…Generally speaking, the thermal conductivity of ceramic nanofiber materials is influenced by various factors, including solid heat conduction, gas heat conduction, radial heat conduction and convective heat conduction. [53][54][55] Once the material composition is determined, we can significantly increase the thermal resistance by optimizing the structure to either store more stationary air or restrict radial and convective heat conduction. 20 The as-fabricated TiO 2 /SiO 2 NFMs exhibit a fluffy porous structure formed by the coiled nanofibers, which has lower thermal conductivity than that of denser NFMs composed of ordinary electrospun non-spiral crimped fibers with low curvature.…”

Section: Stretchability and Flexibility Of Tio 2 /Sio 2 Nfmsmentioning

confidence: 99%

TiO₂/SiO₂ spiral crimped Janus fibers engineered for stretchable ceramic membranes with high-temperature resistance

Jiao,

Cheng,

Fei

et al. 2024

Nanoscale

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“…The high stability is attributed to the "confined effect of nanoislands" (namely unique "one island one atom" architecture), where the Pt atoms can be thermally transported but remain confined in their respective CeO x nanogel islands and will not be aggregated across the adjacent "island" (namely the so-called "moving but not aggregating" design philosophy). In the future, it is expected that this "nanoisland-"stabilized atomically dispersed catalysts can be combined with the macroscopic aerogel materials (such as SiO 2 nanowire aerogel that mass preparation has been achieved [90] ), to construct profitable and highly stable aerogelsupported single-atom nanoisland (SANI) (a new concept just proposed by Li et al [91] ) heterogeneous catalysts. These new-style SANI heterogeneous catalysts would demonstrate wide range of high temperature catalysis applications (or reductive atmosphere catalysis applications) with high catalytic activity, excellent dynamic stability, as well as flexible controllability.…”

Section: The Latent Challenges and Coping Strategies Of Atomic Nanosy...mentioning

confidence: 99%

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

2023

Advanced Materials

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metal catalyst not only has a relatively low metal loading but also greatly improves the utilization efficiency of metal atoms. It can change the adsorption/desorption selectivity of the active components on the catalyst to different molecules, thus affecting the reaction kinetics. [4][5][6] With the development of advanced characterization technologies (synchrotron-radiation X-ray absorption fine structure (XAFS), including X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS); special aberration-corrected transmission electron microscopy (AC-TEM), such as high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), etc.), it has become a reality to elucidate the structure-activity relationship of SACs at the angstroms atomic scale, which also provides an opportunity to link heterogeneous catalysis with homogeneous catalysis. [7,8] In particular, SACs provide a perfect operational platform for the study of molecular level catalytic reaction mechanism. The applications of SACs also become more and more wide, including the versatile heterogeneous catalytic fields (thermocatalysis, electrocatalysis, and photocatalysis) or noncatalytic fields (energy storage battery, electromagnetic wave absorption, and so on).Aerogel is a form of solid matter, one of the least dense solids in the world. The most common aerogel is made of silica; but there are also aerogels made of graphene, metal oxides, polymers, and so on. [9] The lightest silica aerogel is only 3 mg cm −3 , which is 3 times heavier than air, so it is also called "frozen smoke" or "solid smoke." Traditional aerogel material refers to a kind of porous solid material of nanometer or micrometer level formed by the sol-gel method, using certain drying methods (such as freeze drying) to make gas replace liquid phase in gel. [10] Aerogels are highly porous materials (more than 90% porosity), whose internal structure is formed by a network of interconnected basic units (nanosheets, nanofibers, or nanoparticles) separated by open pores. The combination of small basic units, high surface area, and open structure makes aerogels have many unique properties in thermal, mechanical, optical, electrical, and acoustic aspects, which can be used as excellent adsorbents, catalysts, heat insulation materials, and soundThe concept of "single-atom catalysis" is first proposed by Tao Zhang, Jun Li, and Jingyue Liu in 2011. Single-atom catalysts (SACs) have a very high catalytic activity and greatly improved atom utilization ratio. At present, SACs have become frontier materials in the field of catalysis. Aerogels are highly porous materials with extremely low density and extremely high porosity. These pores play a key role in determining their surface reactivity and mechanical stability. The alliance of SACs and aerogels can fully reflect their structural advantages and lead to new enhancement effects. Herein, a general concept of "atomic aerogel materials" (AAMs) (or single-atom aerogels (SAAs)) is proposed to descr...

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Transparent ultrathin SiO2 nanowire aerogel displaying novel properties when interacting with water: A promising versatile functional platform

Cited by 9 publications

References 38 publications

Enzymatic Polysaccharide-Based Aerogel Absorbents for Sustainable Personal Hygiene Applications

Enzymatic Polysaccharide-Based Aerogel Absorbents for Sustainable Personal Hygiene Applications

TiO₂/SiO₂ spiral crimped Janus fibers engineered for stretchable ceramic membranes with high-temperature resistance

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

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Transparent ultrathin SiO2 nanowire aerogel displaying novel properties when interacting with water: A promising versatile functional platform

Cited by 9 publications

References 38 publications

Enzymatic Polysaccharide-Based Aerogel Absorbents for Sustainable Personal Hygiene Applications

Enzymatic Polysaccharide-Based Aerogel Absorbents for Sustainable Personal Hygiene Applications

TiO2/SiO2 spiral crimped Janus fibers engineered for stretchable ceramic membranes with high-temperature resistance

Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science

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Product

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About

TiO₂/SiO₂ spiral crimped Janus fibers engineered for stretchable ceramic membranes with high-temperature resistance