Chemical Characterization of Mesoporous Material Supported ZnO Nanoparticles for Hydrogen Sulfide Capture from Gas Streams

2010 ◽  
Vol 129-131 ◽  
pp. 143-148 ◽  
Author(s):  
Xiao Hui Wang
Keyword(s):  
Zinc Oxide ◽  
Hydrogen Sulfide ◽  
Zno Nanoparticles ◽  
Mesoporous Material ◽  
Chemical Characterization ◽  
Zinc Content ◽  
Gas Mixture ◽  
Gas Streams ◽  
Before And After

A series of zinc oxide-modified mesoporous SBA-15 materials were synthesized. The desulphurization test with a gas mixture containing 0.1 vol % hydrogen sulfide was carried out on these materials. Materials before and after the desulphurization test were analyzed using a variety of characterization techniques. The results suggest that zinc oxide modification can accelerate the transformation from a mesoporous to a zeolitic phase. The sample with the zinc content higher than 15.5 wt % shows the highest hydrogen sulfide breakthrough capacity up to 177.3 mg S/g.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF MESOPOROUS ZINC OXIDE NANOPARTICLES

2020 ◽  
Author(s):  
Vaidehi Katoch ◽  
Jaskaran Singh ◽  
Neeta Raj Sharma ◽  
Ravinder Pal Singh
Keyword(s):  
Zinc Oxide ◽  
Surface Area ◽  
Zno Nanoparticles ◽  
Textural Properties ◽  
Mesoporous Structure ◽  
Ph Variation ◽  
Atomic Structures ◽  
Superior Surface ◽  
Average Size

In this investigation, highly crystalline and mesoporous Zinc oxide (ZnO) nanoparticles with the large surface area were synthesized without calcination. Furthermore, the effects of different pH values on structural, physicochemical and textural properties of ZnO nanoparticles were comprehensively investigated. Rietveld refinement implied that the pH variation had significant effects on the crystal structure of ZnO nanoparticles. The phase, molecular and elemental structures confirmed the formation of ZnO as a major phase in all nanopowders. The morphology of ZnO nanoparticles was irregular with an average size of 45± 9 nm. Both phase and atomic structures confirmed the polycrystalline arrangement of ZnO nanoparticles. Moreover, isotherms confirmed the mesoporous structure of all ZnO nanoparticles with superior specific surface area and porosity volume. Thus, owing to the concoction of high crystallinity, superior surface area and porosity volume, resultant ZnO nanoparticles can be effectively employed for diverse multifunctional therapeutic applications.

Chemical characterization of the bark of Eucalyptus urophylla hybrids in view of their valorization in biorefineries

Holzforschung ◽  
2016 ◽  
Vol 70 (9) ◽  
pp. 819-828 ◽  
Author(s):  
Caroline Sartori ◽  
Graciene da Silva Mota ◽  
Joana Ferreira ◽  
Isabel Miranda ◽  
Fábio Akira Mori ◽  
...  
Keyword(s):  
Phenolic Content ◽  
Raw Materials ◽  
Chemical Characterization ◽  
Polar Compounds ◽  
Added Value ◽  
Bark Extract ◽  
Eucalyptus Urophylla ◽  
Acid Hydrolysate ◽  
Before And After

Abstract Eucalyptus urophylla hybrids are important raw materials for the forest industry in Brazil, and large quantities of barks are available at mill site that may be used for added-value products. The chemical composition of barks of six commercial hybrids clones of E. urophylla×E. grandis, E. urophylla×E. Camaldulensis, and undisclosed E. urophylla hybrids was studied. The hybrids had similar composition, on average (data based on oven dry bark): 16% extractives, mainly corresponding to polar compounds that are soluble in ethanol and water, 19% lignin, 47% polysaccharides, 1% suberin, and 2% ash. The polysaccharides consists mainly of cellulose as indicated by 84% of total neutral monosaccharides in the acid hydrolysate and 10% xylose. The compositions of the lipophilic extracts was determined by GC-MS before and after alkaline hydrolysis. In all the barks, fatty acids, and triterpenes (namely: betulinic and ursolic acids) were the most abundant compounds followed by smaller amounts of sterols, long-chain aliphatic alcohols, phenolic acids, and acylglycerols. The ethanol-water bark extract had a high phenolic content: total phenolics ranged 211–551 mg gallic acid equivalents (GAE) g-1 of extract, tannins 76–184 mg catechin equivalents (CE) g-1 extract, and flavonoids 98–234 mg CE g-1 of extract. The antioxidant activity corresponds to 338 mg Trolox g-1 of extract. Development of high-value products is proposed through an integrated biorefinery approach including valorisation of extractives and targeting for cellulose-based applications.

Biosynthesis and Characterization of Zinc Oxide Nanoparticles for the Systemic Treatment of Patients with Lymphoma in Nursing Care

2020 ◽  
Vol 12 (1) ◽  
pp. 137-143
Author(s):  
Lingling Meng ◽  
Lina Du ◽  
Yaqiong Shen ◽  
Shan Cong ◽  
Qiuyan Zhai ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Systemic Treatment ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Environment Friendly ◽  
Oxide Nanoparticle ◽  
T Lymphoma

Zinc oxide (ZnO) nanoparticles recently are of significant consideration because of their applications as nontoxic metal oxides. This study is mainly intended to improve a simple, efficient, and environment-friendly method for preparation of ZnO nanoparticles. This process has been developed based on plant-intervened synthesis by making use of microwave Saturejahortensis aqueous extract. We have further characterized the obtained Zinc oxide nanoparticles by using different techniques. Additionally, their cytotoxic potential was inspected via MTT assay against both B lymphoma, A20 and T lymphoma, EL4 cells lines. The zinc oxide nanoparticle exposed cells for about 24 h showed diminished cell viability in the tested cell lines where EL4 cells has been reduced to 75% of control after 24 h, whereas A20 cells were lowered to 68% of control. ZnO-NPs have proficiently hindered EL4 cell DNA synthesis at 100 μg concentration whereas completely blocked the DNA proliferation at about 50 g concentration. However, A20 cells besides presented similar propensity, thus exploring the ZnO-NPs potential to treat lymphomas.

Preparation and Characterization of Zinc Loaded Hollow Glass Microspheres (HGMs) from Amber Coloured Glass Frits

2013 ◽  
Vol 864-867 ◽  
pp. 668-671
Author(s):  
Sridhar Dalai ◽  
Savithri Vijayalakshmi ◽  
Santosh Param Sivam ◽  
Sharma Pratibha
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Acetate ◽  
Glass Powder ◽  
Zinc Content ◽  
Single Step ◽  
Colored Glass ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass

Hollow glass microspheres loaded with ZnO nanoparticles were fabricated from amber colored glass powder blended with zinc acetate salt, by flame spheroidisation method. The morphology and the microstructure of the samples were observed using SEM, TEM, FTIR and XRD techniques, whereas the composition of the feed glass and product HGMs were determined using EDX and ICP. The results showed that HGMs with surface coating of zinc oxide nanoparticles can be successfully synthesized using this single step process. Effect of zinc acetate percentage (0-10%) in the glass feed on the formation of zinc oxide coated HGMs and the nature of the ZnO coating were studied. A continuous thin coating of ZnO nanoparticles on the HGMs surface were obtained when the zinc acetate content in the feed glass powder was 2-5%. Further increase of the zinc acetate in the feed glass led to uneven coating on the surface of HGMs. A clear cut diffraction pattern for crystalline ZnO was observed at the thick patches observed on the HGMs samples with 10% loading of zinc. The thickness of the ZnO coating increased from 10 nm to 500 nm when the zinc content in the feed glass increased from 2 to 10%.

Morphological and Adsorptive Characteristics of Hydrogen Sulphide on Zinc Oxide Nanoparticles Modified SBA-15

2011 ◽  
Vol 287-290 ◽  
pp. 518-523
Author(s):  
Xiao Hui Wang ◽  
Hui Ding
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Nitrogen Adsorption ◽  
Gas Mixture ◽  
Oxide Nanoparticles ◽  
Solid State Method ◽  
Standard Methods ◽  
Microwave Assisted ◽  
Before And After ◽  
State Method

Using microwave-assisted solid-state method, a series of zinc oxide-modified mesoporous SBA-15 materials were synthesized. The desulphurization test with a gas mixture containing 0.1 vol % hydrogen sulfide was carried out on these materials. Chemicals before and after the desulphurization test were analyzed using nitrogen adsorption, XRD, EDS, TEM, ICP and other standard methods. The results suggest that zinc oxide modification can accelerate the transformation from a mesoporous to a zeolite phase. The different zinc loading results in different zinc-phase dispersions on the materials.

scholarly journals RESÍDUOS DA INDÚSTRIA CERVEJEIRA NA PRODUÇÃO DE NOVOS SUBSTRATOS PARA O CULTIVO DO COGUMELO Ganoderma lucidum

2020 ◽  
Vol 35 (2) ◽  
pp. 265-275
Author(s):  
Ana Claudia Chimini ◽  
Dalvan Pereira Abilio ◽  
Otavio Augusto Pessotto Alves Siqueira ◽  
Meire Cristina Nogueira de Andrade ◽  
Olívia Gomes Martins
Keyword(s):  
Ganoderma Lucidum ◽  
Evaluation Criteria ◽  
Chemical Characterization ◽  
Sao Paulo ◽  
São Paulo ◽  
Brewing Industry ◽  
Beer Industry ◽  
Before And After ◽  
E Mail

RESÍDUOS DA INDÚSTRIA CERVEJEIRA NA PRODUÇÃO DE NOVOS SUBSTRATOS PARA O CULTIVO DO COGUMELO Ganoderma lucidum   ANA CLAUDIA CHIMINI1, DALVAN PEREIRA ABILIO2, OTAVIO AUGUSTO PESSOTTO ALVES SIQUEIRA3, OLÍVIA GOMES MARTINS4, MEIRE CRISTINA NOGUEIRA DE ANDRADE5   1Graduanda em Engenharia Agronômica, Universidade do Sagrado Coração. Endereço: Rua Irmã Arminda 10-50, Jardim Brasil, CEP:17011-160, Bauru, São Paulo, Brasil. E-mail: [email protected] 2Graduando em Ciências Biológicas, Universidade do Sagrado Coração. Endereço: Rua Irmã Arminda 10-50, Jardim Brasil, CEP:17011-160, Bauru, São Paulo, Brasil. E-mail: [email protected] 3Mestre em Agronomia ,Universidade Estadual Paulista “Júlio Mesquita Filho”, Faculdade de Ciências Agronômicas de Botucatu. Endereço: Rua José Barbosa de Barros 3780, Av. Universitária Altos do Paraíso, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail: [email protected] 4Doutoranda em Agronomia – Energia na Agricultura, Universidade Estadual Paulista “Júlio Mesquita Filho”, Faculdade de Ciências Agronômicas de Botucatu. Endereço: Rua José Barbosa de Barros 3780, Av. Universitária Altos do Paraíso, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail: [email protected] 5Doutora em Agronomia, docente permanente do Programa de Pós-graduação em Agronomia – Energia na Agricultura, Universidade Estadual Paulista “Júlio Mesquita Filho”, Faculdade de Ciências Agronômicas de Botucatu. Endereço: Rua José Barbosa de Barros 3780, Av. Universitária Altos do Paraíso, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail: [email protected]   RESUMO: Este estudo objetivou avaliar o potencial de três resíduos da indústria cervejeira (bagaço de malte, fermento e proteína) na suplementação de substratos para o cultivo de duas linhagens de Ganoderma lucidum (FF e M). Para isto, foi realizado um delineamento experimental 2x4 (linhagens x substratos), totalizando oito tratamentos. Os substratos foram preparados, esterilizados e acondicionados em pacotes de PEAD que, posteriormente, foram inoculados e incubados. Os cogumelos foram colhidos e pesados até o fim do ciclo de cultivo. Foram colhidas amostras dos substratos antes e depois do cultivo para caracterização química. Quanto ao potencial dos resíduos, levaram-se como critérios de avaliação a caracterização química dos substratos e a produção (massa de basidiomas frescos). Os dados foram submetidos à análise estatística. Verificou-se que para a linhagem FF de G. lucidum, o substrato que proporcionou o melhor desempenho de massa foi o suplementado com bagaço de malte (BM), resultando em uma média de 48,3g. Portanto, concluiu-se que, dentre os resíduos de cervejaria avaliados, o bagaço de malte foi o mais recomendado para o cultivo de G. lucidum.   Palavras-chave: aproveitamento, bagaço de malte, fungos.   WASTES FROM BEER INDUSTRY IN THE PRODUCTION OF NEW SUBSTRATES FOR Ganoderma lucidum MUSHROOM CULTIVATION   ABSTRACT: This study aimed to evaluate the potential of three residues from the brewing industry (malt bagasse, yeast and protein) in the supplementation of substrates for cultivation of two Ganoderma lucidum strains (FF and M). The experimental design was a 2 x 4 (strains x substrates), totalizing 8 treatments. The substrates were prepared, sterilized and packed in HDPE, which were later inoculated and incubated. The mushrooms were harvested and weighed until the end of the cultivation cycle. Samples of substrates were taken before and after cultivation for chemical characterization. As for the potential of the residues, the chemical characterization of the substrates and the production (fresh basidiomas mass) were taken as evaluation criteria. The data were submitted to statistical analysis. It was found that for the FF strain of G. lucidum, the substrate that provided the best mass performance was supplemented with malt bagasse (MB), resulting in an average of 48.3 g. Therefore, it was concluded that, among the brewery residues evaluated, the malt bagasse was the most recommended for the cultivation of G. lucidum.   Keywords: Repurposing, malt bagasse, fungi.

Synthesis and Characterization of Poly(N-Isopropylacrylamide)-Modified Zinc Oxide Nanoparticles

2013 ◽  
Vol 771 ◽  
pp. 141-146 ◽  
Author(s):  
Ping Zhang ◽  
Shan Shan Wu
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Chain Transfer ◽  
Size Structure ◽  
Random Coil ◽  
Reversible Addition ◽  
Structure Morphology ◽  
Raft Agent ◽  
Effect Of Surface

This paper reports a surface functional polymer- poly(N-isopropylacrylamide) (PNIPAM) was grafted on the surface of zinc oxide (ZnO) nanoparticles. It has been demonstrated that Reversible addition fragmentation chain-transfer (RAFT) agent was successfully grafted onto the surface of ZnO. PNIPAM chains were successfully grafted from the surface of ZnO via RAFT process by using RAFT agent immobilized on ZnO. The effect of surface modification on the size, structure, morphology, and properties of ZnO nanoparticles was investigated. The thickness of a PNIPAM monolayer bound to the ZnO core is somewhat larger than the size of the random coil of the corresponding free PNIPAM in aqueous solution, which suggests that the conformation of a PNIPAM chain bound to the ZnO core is extended.

scholarly journals Using Co-Precipitation Method Determining Synthesis and Characterization of Fe Doped Zinc Oxide Nanoparticles

2019 ◽  
Vol 8 (9S3) ◽  
pp. 705-707
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Chemical Precipitation ◽  
Zinc Nitrate ◽  
Precipitation Method ◽  
Ferric Nitrate ◽  
Doped Zno ◽  
Co Precipitation

In through concoction co-precipitation strategy using ferric nitrate, zinc nitrate and sodium hydroxide in fluid arrangements, orchestrate and portrayal of Fe doped ZnO nanoparticles were prepared in the present work. X-beam diffraction has confirmed the growth of Fe doped ZnO from the precursor. This result has revealed that nanoparticles have integrated excellent crystalline forces in nature. SEM investigations show that ZnO nanoparticles have been doped by the round and minimally agglomerated Fe. Room temperature powerless ferromagnetism, distinctive in the appealing characteristics of Fe doped ZnO powderKeywords in relation to room temperature: zinc oxide, SEM, chemical precipitation, XRD, VSM

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