A general and low-cost synthetic route to high-surface area metal oxides through a silica xerogel template

The adsorption properties of two nanomorphologies of trititanate, nanotubes (TiNT) and plates (TiNP), prepared by the hydrothermal reaction of concentrated NaOH with different phases of TiO2, were examined. It was found that the capacity for both morphologies towards methylene blue (MB), an ideal pollutant, was extremely high, with the TiNP having a capacity of 130 mg/g, higher than the TiNT, whose capacity was 120 mg/g at 10 mg/L MB concentration. At capacity, the well-dispersed powders deposit on the floor of the reaction vessel. The two morphologies had very different structural and adsorption properties. TiNT with high surface area and pore volume exhibited exothermic monolayer adsorption of MB. TiNP with low surface area and pore volume yielded a higher adsorption capacity through endothermic multilayer adsorption governed by pore diffusion. TiNP exhibited a higher negative surface charge of −23 mV, compared to −12 mV for TiNT. The adsorption process appears to be an electrostatic interaction, with the cationic dye attracted more strongly to the nanoplates, resulting in a higher adsorption capacity and different adsorption modes. We believe this simple, low cost production of high capacity nanostructured adsorbent material has potential uses in wastewater treatment.

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Highly active mixed-valent MnOxspheres constructed by nanocrystals as efficient catalysts for long-cycle Li–O2batteries

Journal of Materials Chemistry A ◽

10.1039/c6ta07488j ◽

2016 ◽

Vol 4 (43) ◽

pp. 17129-17137 ◽

Cited By ~ 18

Author(s):

Sanpei Zhang ◽

Zhaoyin Wen ◽

Yang Lu ◽

Xiangwei Wu ◽

Jianhua Yang

Keyword(s):

Surface Area ◽

Low Cost ◽

High Surface ◽

High Surface Area ◽

Long Cycle ◽

Highly Active

We demonstrate a low-cost and facile strategy to synthesize mixed-valent MnOxspheres constructed from nanocrystals (~5 nm), containing MnII, MnIII, and MnIVspecies. Such highly active mixed-valent MnOxspheres with high surface area greatly improve the performance of Li–O2batteries.

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High surface area metal oxides from matrix assisted preparation in activated carbons

Studies in Surface Science and Catalysis - Scientific Bases for the Preparation of Heterogeneous Catalysts - Proceedings of the 8th International Symposium, Louvain-la-Neuve, Belgium 9-12, 2002 ◽

10.1016/s0167-2991(00)80646-1 ◽

2000 ◽

pp. 93-100 ◽

Cited By ~ 17

Author(s):

M. Schwickardi ◽

T. Johann ◽

W. Schmidt ◽

O. Busch ◽

F. Schüth

Keyword(s):

Metal Oxides ◽

Surface Area ◽

Activated Carbons ◽

High Surface ◽

High Surface Area

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Multimolecular assemblies on high surface area metal oxides and their role in interfacial energy and electron transfer

Chemical Society Reviews ◽

10.1039/c7cs00565b ◽

2018 ◽

Vol 47 (1) ◽

pp. 104-148 ◽

Cited By ~ 54

Author(s):

Jamie C. Wang ◽

Sean P. Hill ◽

Tristan Dilbeck ◽

Omotola O. Ogunsolu ◽

Tanmay Banerjee ◽

...

Keyword(s):

Electron Transfer ◽

Metal Oxides ◽

Surface Area ◽

Interfacial Energy ◽

High Surface ◽

High Surface Area ◽

Energy And Electron Transfer ◽

Molecular Components

High surface area metal oxides offer a unique substrate for the assembly of multiple molecular components at an interface.

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Aqueous synthesis of high surface area metal oxides

Catalysis Today ◽

10.1016/j.cattod.2008.04.045 ◽

2008 ◽

Vol 137 (1) ◽

pp. 132-143 ◽

Cited By ~ 32

Author(s):

C BLUTHARDT ◽

C FINK ◽

K FLICK ◽

A HAGEMEYER ◽

M SCHLICHTER ◽

...

Keyword(s):

Metal Oxides ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Aqueous Synthesis

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Reduction of bis(Oxalato)Borate on a High Surface Area Carbon Electrode

MRS Proceedings ◽

10.1557/proc-1127-t03-11 ◽

2008 ◽

Vol 1127 ◽

Author(s):

John Flynn ◽

Carl Schlaikjer

Keyword(s):

Surface Area ◽

Low Cost ◽

High Surface ◽

High Surface Area ◽

Lithium Ion ◽

Potential Range ◽

Electrolytic Properties ◽

Extensive Exchange ◽

Soluble Species ◽

Wide Potential

ABSTRACTLithium bis(oxalato)borate (LiBOB) has gained widespread interest as an electrolyte salt for lithium ion batteries because of its high conductivity, low cost, thermal stability, and adequate solubility in many organic solvents [1]. Cyclic voltammetric data taken on platinum [2] and carbon [3] indicate electrochemical stability over a wide potential range.We show that bis(oxalato)borate (BOB) can be reduced at about 1.75 volts anodic to lithium, by discharging electrolytes at low current density (0.1 mA/cm2) on high surface area carbon electrodes containing a mixture of acetylene and Ketjen carbon blacks. The evidence includes discharge profiles and 11B NMR data. The behavior of discharge plateaus indicates that BOB is reduced to a soluble species with electrolytic properties, and the appearance of a broad 11B NMR peak in the electrolyte indicates that the reduced species undergoes extensive exchange.

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Novel Preparation of Nano-Sized TiO2 and ZrO2 Particles by Nanocasting with Nanoporous SiO2 and Selective Dissolution

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.124-126.643 ◽

2007 ◽

Vol 124-126 ◽

pp. 643-646

Author(s):

Jun Lee ◽

Yoshihiro Sugi ◽

Nam Jo Jeong ◽

Gon Seo ◽

Sung June Cho

Keyword(s):

Metal Oxides ◽

Surface Area ◽

Pore Volume ◽

High Surface ◽

High Surface Area ◽

Selective Dissolution ◽

Metal Alkoxides ◽

Nanocrystalline Metal

High surface area and uniform nano-sized TiO2 and ZrO2 were prepared readily by the infiltration of metal alkoxides into the nanoporous SiO2, SBA-15 and the following selective dissolution of SiO2. The obtained particles of TiO2 and ZrO2, 8.1 nm were nanocrystalline of which the structure were anatase and tetragonal, respectively. The surface area and pore volume of the nanocrystalline metal oxides can be increased to above 200 m2g-1 and 0.30 cm3g-1, respectively.

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Silica Nanoparticles for Biomedical Application: Challenges and Opportunities

Eurasian Journal of Applied Biotechnology ◽

10.11134/btp.1.2020.2 ◽

2020 ◽

Author(s):

E.A. Mun ◽

B.A. Zhaisanbayeva

Keyword(s):

Silica Nanoparticles ◽

Surface Area ◽

Biomedical Application ◽

Low Cost ◽

High Surface ◽

High Surface Area ◽

Drug Carriers ◽

High Reactivity ◽

Diagnostic Tools ◽

Gene Delivery Vectors

Over the past few decades, nanoparticles have been attracting significant attention of researches in chemical, biomedical, pharmaceutical sciences, due to their unique physicochemical properties. This includes ultra small size, large surface area, good biocompatibility and high reactivity. In particular, nanoparticles are promising for pharmaceutical and biomedical fields, as they can be applied as drug carriers and diagnostic tools. Among nanomaterials for biomedical application, silica nanoparticles exhibit great potential due to their straightforward synthesis and separation, low cost, safety, biocompatibility and possibility to further functionalization. Silica nanoparticles have been attractive for pharmaceutical science due to their unique properties, such as tunable size, high surface area and large pore volume, and potential in biomedical application as drug and gene delivery vectors and bioimaging agents. However, some of their properties remain poorly investigated. This short communication discusses the main routes for synthesis of silica nanoparticles, their properties and opportunities for their application in pharmaceutical and biomedical industries, as well as a few challenges in the development of silica-based systems that need to be overcome.

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