High adsorption activated calcium silicate enabling high-capacity adsorption for sulfur dioxide

2020 ◽  
Vol 44 (27) ◽  
pp. 11879-11886
Author(s):  
Feng Wang ◽  
Yongfeng Zhang ◽  
Zhihui Mao
Keyword(s):  
Fly Ash ◽  
Sulfur Dioxide ◽  
Calcium Silicate ◽  
Porous Silica ◽  
High Capacity ◽  
High Porosity ◽  
High Adsorption ◽  
Adsorption Performance ◽  
Silicon Sources

Fly ash, with its abundant silicon sources and high porosity, is an excellent precursor of porous silica-based sorbents, which are the key to obtaining high SO2 adsorption performance.

scholarly journals Simultaneously Remove and Visually Detect Ce4+ Based on Nanocomposite of UiO-66-NH2/CPA-MA

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Xiaoqiu Tang ◽  
Guanghui Wu ◽  
Tao Wang ◽  
Pinghua Chen ◽  
Jiezeng Chen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
High Capacity ◽  
High Adsorption ◽  
Kinetics Of Adsorption ◽  
Effective Strategies ◽  
Adsorption Performance ◽  
Kinetics Of

Effective strategies to deal with rare earth pollution are urgently needed due to the overexploitation of rare earths resource. In this study, a novel nanocomposite of UiO-66-NH2/CPA-MA denoted as UA was successfully synthesized, which can simultaneously remove and detect Ce4+ in water. The hybrid consists of UiO-66-NH2 and CPA-MA. Based on the high adsorption performance of UiO-66-NH2, it can remove Ce4+ with high capacity by adsorption. Moreover, it can change its color from olive drab to light cyan depending on the adsorbed Ce4+ concentration, and the chroma is linearly related to the Ce4+ concentration. So, UA can be used to qualitatively and quantitatively detect Ce4+ by its color changing. The kinetics of adsorption course was investigated in details. The anti-inference ability of the nanocomposite in coexisting systems was carefully evaluated. The results indicate that UiO-66-NH2/CPA-MA is highly potential to deal with Ce4+ pollutions due to its bifunctionality.

scholarly journals Simultaneously Remove and Visually Detect Ce4+ Based On Nanocomposite of UiO-66-NH2/CPA-MA

2021 ◽  
Author(s):  
Xiaoqiu Tang ◽  
Pinghua Chen ◽  
Tao Wang ◽  
Jiezeng Ceng ◽  
Hualin Jiang
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
High Capacity ◽  
High Adsorption ◽  
Kinetics Of Adsorption ◽  
Effective Strategies ◽  
Adsorption Performance ◽  
Kinetics Of

Abstract Effective strategies to deal with rare earth pollution are urgently needed due to the overexploitation of rare earths resource. In this study, a novel nanocomposite of UiO-66-NH2/CPA-MA denoted as UA was successfully synthesized, which can simultaneously remove and detect Ce4+ in water. The hybrid consists of UiO-66-NH2 and CPA-MA. Based on the high adsorption performance of UiO-66-NH2, it can remove Ce4+ with high capacity by adsorption. Moreover, it can change its color from olive drab to light cyan depending on the adsorbed Ce4+ concentration, and the chroma is linearly related to the Ce4+ concentration. So UA can be used to qualitatively and quantitatively detect Ce4+ by its color changing. The kinetics of adsorption course were investigated in details. The anti-inference ability of the nanocomposite in co-existing systems were carefully evaluated. The results indicate that UiO-66-NH2/CPA-MA is highly potential to deal with Ce4+ pollutions due to its bi-functionality.

scholarly journals A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

Molecules ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 241
Author(s):  
Raul-Augustin Mitran ◽  
Simona Ioniţǎ ◽  
Daniel Lincu ◽  
Daniela Berger ◽  
Cristian Matei
Keyword(s):  
Phase Change ◽  
Latent Heat ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Porous Silica ◽  
Lessons Learned ◽  
High Porosity ◽  
Storage Materials ◽  
Silica Nanomaterials ◽  
Heat Storage Materials

Phase change materials (PCMs) can store thermal energy as latent heat through phase transitions. PCMs using the solid-liquid phase transition offer high 100–300 J g−1 enthalpy at constant temperature. However, pure compounds suffer from leakage, incongruent melting and crystallization, phase separation, and supercooling, which limit their heat storage capacity and reliability during multiple heating-cooling cycles. An appropriate approach to mitigating these drawbacks is the construction of composites as shape-stabilized phase change materials which retain their macroscopic solid shape even at temperatures above the melting point of the active heat storage compound. Shape-stabilized materials can be obtained by PCMs impregnation into porous matrices. Porous silica nanomaterials are promising matrices due to their high porosity and adsorption capacity, chemical and thermal stability and possibility of changing their structure through chemical synthesis. This review offers a first in-depth look at the various methods for obtaining composite PCMs using porous silica nanomaterials, their properties, and applications. The synthesis and properties of porous silica composites are presented based on the main classes of compounds which can act as heat storage materials (paraffins, fatty acids, polymers, small organic molecules, hydrated salts, molten salts and metals). The physico-chemical phenomena arising from the nanoconfinement of phase change materials into the silica pores are discussed from both theoretical and practical standpoints. The lessons learned so far in designing efficient composite PCMs using porous silica matrices are presented, as well as the future perspectives on improving the heat storage materials.

Facile and large-scale synthesis of poly(m-phenylenediamine) nanobelts with high surface area and superior dye adsorption ability

RSC Advances ◽  
2014 ◽  
Vol 4 (85) ◽  
pp. 45244-45250 ◽  
Author(s):  
Yun Meng ◽  
Liyuan Zhang ◽  
Liyuan Chai ◽  
Wanting Yu ◽  
Ting Wang ◽  
...  
Keyword(s):  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Adsorption Performance ◽  
Large Scale Synthesis

PmPD nanobelts with high adsorption performance have been synthesized by using CTAP as oxidants.

Study of Porous Silica Based Films as Low-k Dielectric Material and their Interface with Copper Metallization

2002 ◽  
Vol 716 ◽  
Author(s):  
Ilanit Fisher ◽  
Wayne D. Kaplan ◽  
Moshe Eizenberg ◽  
Michael Nault ◽  
Timothy Weidman
Keyword(s):  
Integrated Circuits ◽  
Dielectric Material ◽  
Hydrogen Plasma ◽  
Porous Silica ◽  
Film Deposition ◽  
Copper Metallization ◽  
High Porosity ◽  
Tem Analysis ◽  
Chip Technology ◽  
Low K

AbstractThe success of future gigascale integrated circuits (IC) chip technology depends critically upon the reduction of the interconnects RC delay time. This calls for the development of new low dielectric constant (low-k) insulators, and for work on their integration with lower resistivity copper metallization.A porous silica based film prepared by surfactant templated self-assembly spin-on deposition (SOD) is an attractive candidate as a low-k material. In this research we have studied the structure, chemical composition and bonding of the film and its interface with copper metallization. The decomposition and vaporization of the surfactant in the last step of film deposition resulted in a film with an amorphous structure, as determined by XRD and TEM analysis. Its high porosity (35-58%) was confirmed by XRR and RBS measurements. XPS analysis of the Si2p transition indicated three types of bonding: Si-O, O-Si-C and Si-C. The bonding characteristics were also investigated by FTIR analysis. The effect of a hydrogen plasma post-treatment process on the film topography and bonding was determined by AFM and XPS, respectively. It was found that direct H2 plasma exposure significantly affected the surface roughness of the film and type of chemical bonding. The structure and properties of various PECVD deposited capping layers were also studied, as was the interface between the porous dielectric and Ta, TaxN and Cu (PVD deposited films) after annealing at 200-700°C in vacuum environment for 30 min. At temperatures up to 500°C, no significant diffusion of Cu or Ta into the porous film was detected, as determined by RBS. No copper penetration was detected up to 700°C, according to AES and SIMS analysis. However, at 700°C copper dewetting occurred when it was deposited directly on the porous silica based film.

Hydration Activity of Ceramic Polishing Powder at Autoclaved Condition

2012 ◽  
Vol 568 ◽  
pp. 392-395
Author(s):  
Ming Feng Zhong ◽  
Da Gen Su ◽  
Yi Xiang Zhao
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Civil Engineering

Hydration activity of waste ceramic polishing powder at autocalved condition were studied by IR, XRD, SEM and EDS in civil engineering. The results shown that autoclaved condition is beneficial to inspire hydration ability of polishing powder, the more active silicon and aluminium were dissolved, and they were converted into low Ca/Si ratio calcium silicate hydrate, whose ratio of Ca/Si was 1.58, and the compressive strength of autoclaved silicate product made by the ceramic polishing powder was higher than that of fly ash.

scholarly journals Preparation of flower-like MgO via spray drying with high adsorption performance

2018 ◽  
Vol 423 ◽  
pp. 012085 ◽  
Author(s):  
Mengjie Kuang ◽  
Gaoling Yang ◽  
Zeming Xie ◽  
Qi Su ◽  
Baixiong Liu
Keyword(s):  
Spray Drying ◽  
High Adsorption ◽  
Adsorption Performance
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