High specific surface area

Bio-nanomaterials have been gaining increased attention recently due to their special, nano-specific properties such as their high specific area compared to their bulk materials and their environmentally friendly, and renewable properties. Overall, this review discusses recent advances of two nanomaterials derived from bio-sources, which are nanocellulose and carbon-based nanomaterials in the application of electrochemical energy storage devices, specifically batteries and supercapacitors.

12p dianmotminh02 03-05-2024 4 1   Download

The high capacity electrode material design with rapid charging/discharging and long life capability has become a critical issue and main concern in recent years. Nickel oxide (NiO) has received much attention in the field of energy storage as a cathode electrode material owing to its layered structure with large spacing, crystal structure, and high specific surface area.

10p viberbers 09-08-2023 4 3   Download

This study presents a novel mixed-mode weak cation-exchange (WCX) material. This material was prepared by means of the functionalization of a mesoporous divinylbenzene (DVB) resin with maleic acid (maleic acid-DVB), which yielded a high carboxylic moiety content resulting in WCX interactions as well as suitable specific surface area for reversed-phase interactions.

8p viginny 23-12-2022 6 3   Download

Organofunctional porous methyltrimethoxysilane (MTMS)-based aerogels are attractive for various adsorption purposes due to the combination of their unique properties such as low densities and high specific surface areas with tunable and accessible functional groups that can coordinate to, e.g., heavy metals and/or organic dye molecules in polar and non-polar solutions.

11p vironald 15-12-2022 9 2   Download

With the continuous growth in global population, energy demands are summoning the development of novel materials with high specific surface areas (SSA) for energy and environmental applications. High-SSA silicabased materials, such as aerogels, are highly popular as they are easy to form and tune.

15p vironald 15-12-2022 9 3   Download

The aim of the work "Activated carbon derived from rice husk by NaOH activation and its application in supercapacitor" is to prepare a low-cost, high specific surface area activated carbon with microporous and mesoporous ranges using rice husk as the raw material. The effects of activation temperature on the specific surface area, pore structure, morphology and thermal stability of the AC samples have been examined. The AC samples were proved to be excellent electrode material for supercapacitor, hence solve the disposal and pollution problems of rice husk.

9p runordie3 27-06-2022 9 2   Download

The use of multiwalled carbon nanotubes (CNTs) in sol-gel synthesized titanium dioxide (TiO2) photocatalysts as templates was systematically studied. CNTs have high oxidative thermal stability and the controlled removal of CNTs can be achieved at lower temperatures under air flow by the use of Na, Fe, and Co as a catalyst. These catalysts helped to reduce the oxidation temperature of CNTs; thus anatase phase was achieved without significant sintering.

15p langthannam 29-12-2021 8 0   Download

Sugarcane bagasse as an agricultural/industrial biomass was converted into a low-cost activated carbon via an acid activation procedure under optimized conditions. Phosphoric acid was applied as a cost-effective and environmentally friendly chemical activator. The optimized activated carbon produced under temperature of 550°C and impregnation ratio of 1.5 showed a micromesoporous structure with specific surface area and pore volume of 972.5 m2/g and 0.43 cm3/g, respectively.

16p tudichquannguyet 29-11-2021 8 0   Download

Crystallinity could have a decisive influence on photocatalytic performance. In this study, the synthesis of crystalline carbon nitride (CN) was studied via an ionic melt polycondensation of urea precursor in the presence of various salt melts, which were KCl-LiCl, KCl-NaCl, and KCl-ZnCl2. While all the salt melts helped to improve the optical properties of the CN, only KCl-LiCl salt melt could form crystalline CN as evidenced by its X-ray diffraction pattern.

10p tudichquannguyet 29-11-2021 12 1   Download

The present paper aimed at the investigation of the effect of preliminary acid treatment on the structure and purity of extracted silica. In this study, the acid leaching of rice husk (RH) in 2 M hydrochloric acid solution before the calcination process at 600◦C was proposed to achieve completely white silica with high specific surface area and low content of impurities. RH, selected from the Almaty Region, Kyzylorda Region, and Turkestan Region was used as the main silica source. The results confirmed that the highest purity (98.2%–99.

12p tudichquannguyet 29-11-2021 8 1   Download

The article will cover and describe the data, libraries, methods, and algorithms used to develop the project. In a nutshell, the article concludes that the purpose of this research is to bring new perspectives to the data at the very area where they are practically relevant to ourselves, specifically in this research, the students’ scores in IT Faculty of HANU, and offer advice to students to improve their ability to complete the subject they have participated.

11p huyetthienthan 23-11-2021 14 2   Download

In this work, metal nanoparticles were successfully synthesized through the reduction of metal salts using reducing agents such as: ethylene glycol (EG) and sodium borohydride (NaBH4). These metal nanoparticles were impregnated into the supports M-X (M = Ni, Pd; X = Bent, C, Zeolite, and Al2O3) in high yield. The physio-chemical properties of these catalysts were characterized by various techniques such as UV-Vis spectroscopy, powder X-ray diffraction (PXRD), Transmission electron microscopy (TEM) and the specific surface area of M-X was evaluated by N2 adsorption isotherm analysis at 77 K.

6p cothumenhmong11 06-05-2021 6 2   Download

In this work, highly ordered mesoporous graphitic carbon (G-CMK3) has been prepared successfully by a nano-casting method using sucrose as carbon source, mesoporous silica as hard template, and soybean oil as surfactant. In the absence of soybean oil surfactant, the synthesized ordered mesoporous carbon material, CMK-3, revealed a low graphitization degree with a specific surface area of 1049.1 m2 /g and a high pore volume of 1.172 cm3 /g.

7p nguathienthan9 08-12-2020 13 0   Download

This technique allows saving Portland cement without reducing significantly the concrete strength. The ability to obtain ultra-fine mineral fillers from industrial by-products with high specific surface area appears with grinding technology development.

7p lucastanguyen 01-06-2020 19 1   Download

The catalyst 7.5% NiO/TiO2 and seven samples of NiO/γ-Al2O3 with NiO content from 7.5% to 60% have been obtained and studied. Physico-chemical characteristics of the catalysts were determined by methods of Adsorption (BET), X-ray Diffraction (XRD), TemperatureProgrammed Reduction (TPR) and Hydrogen Pulse Titration. The catalytic properties of the obtained samples were investigated in the reaction of CO methanation at temperatures 180 – 220◦C and mole ratios hydrogen/carbon monoxide 25-100.

16p 12120609 01-06-2020 5 0   Download

A highly ordered mesoporous bio-glass has been successfully prepared by the sol-gel method, in which copolymer pluronic P123 was used as a structure-creating template. The obtained material has the mesoporous structure with the high value of specific surface area (395.6 m2 /g) and the 2D hexagonal pore architecture with the pore sizes from 5.5 to 7 nm.

7p viino2711 08-05-2020 8 0   Download

The increase in population and reduction of available land and water resources are major concern for agriculture to meet food requirement. The possible growth in agriculture can be achieved by increasing productivity through soil, water and nutrient management supported by an effective use of modern technology like nanotechnology. The small size, high specific surface area and reactivity of nano fertilizers compared to bulk fertilizers may increase the solubility, diffusion and availability of nutrients to plants and enhance crop productivity.

20p angicungduoc4 26-04-2020 20 0   Download

Nanotechnology in particular carbon nanomaterials, such as carbon nanotubes (CNTs) and graphene, is both technologically and commercially important. This is clearly seen from the amount of scientific and production activities in the last two decades. Carbon nanomaterials have been portrayed as the materials of the 21st century, in a similar manner that Si technology/information technology and petrochemicals have significantly contributed to the worldwide development in the last century.

12p nguathienthan2 24-12-2019 36 0   Download

In this research, graphene aerogel (GA) was fabricated by chemical reduction method, in which ethylenediamine (EDA) was used as a reducing and functionalising agent. The characterisation of GA was studied by density, field-emission scanning electron microscope, Brunauer-Emmett-Teller (BET) specific surface area, Fourier transform infrared spectroscopy, and X-ray diffraction. The results of the analysis showed that GA exhibits low density, ranging from 4-8 mg/cm3 , high porosity, and BET specific surface area changes from 176 to 1845 m2 /g.

6p caygaocaolon1 13-11-2019 36 2   Download

The characterization results show that the obtained amorphous silica was 99.8 % purity with average particle size of 5–10 nm, and high specific surface area of 224 m2 /g. Additionally, for the first time that RHA–silica was successfully applied as an anti–caking agent for a NPK–fertilizer. A suitable content of silica was evaluated through the level of anti–caking. The testing results show that with only 1.5 wt% of RHA–silica particles could replace kaolin as an anti–caking agent for the NPK–fertilizer.

9p cumeo3000 01-08-2018 30 1   Download