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Estudo da degradação do pesticida fipronil utilizando heteroestruturas de semicondutores de BiVO4/CePO4 e CePO4/BiVO4 利用BiVO4/CePO4和CePO4/BiVO4半导体异质结构降解农药氟虫腈的研究
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843082
A. C. Eduardo, M. H. M. Rodrigues, W. D. Mesquita, R. F. Gonçalves, M. F. Gurgel, M. Godinho
{"title":"Estudo da degradação do pesticida fipronil utilizando heteroestruturas de semicondutores de BiVO4/CePO4 e CePO4/BiVO4","authors":"A. C. Eduardo, M. H. M. Rodrigues, W. D. Mesquita, R. F. Gonçalves, M. F. Gurgel, M. Godinho","doi":"10.1590/0366-69132021673843082","DOIUrl":"https://doi.org/10.1590/0366-69132021673843082","url":null,"abstract":"Resumo O uso de pesticidas, como o fipronil, visa o aumento da produtividade, melhoria na qualidade dos produtos gerados e a diminuição de prejuízos. Contudo, os resíduos acumulados podem ser lavados durante as chuvas, ocasionando a contaminação de águas superficiais e subterrâneas. Nesse aspecto, a combinação entre semicondutores na forma de heteroestruturas é uma alternativa para degradação de tais poluentes. Heteroestruturas BiVO4/CePO4 e CePO4/BiVO4 foram sintetizadas pelo método de coprecipitação seguido de tratamento hidrotérmico assistido por micro-ondas, a 130 °C por 30 min. Os estudos de difração de raios X demonstraram a formação das heteroestruturas com estruturas de fase hexagonal (CePO4) e tetragonais scheelita e zircônia (BiVO4). Os resultados obtidos por microscopia eletrônica de transmissão e espectroscopia de infravermelho sugeriram a formação de uma região de interface, a qual contribuiu na sinergia entre os catalisadores. As heteroestruturas BiVO4/CePO4 e CePO4/BiVO4 apresentaram degradação de 80,06% e 99,50%, respectivamente, frente ao pesticida fipronil.","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48605822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of chemical and thermal activations of zeolite-lime blend 沸石-石灰混合料的化学和热活化研究
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843138
M. Meziani, M. Amari, M. Baloul, N. Chelouah
{"title":"Study of chemical and thermal activations of zeolite-lime blend","authors":"M. Meziani, M. Amari, M. Baloul, N. Chelouah","doi":"10.1590/0366-69132021673843138","DOIUrl":"https://doi.org/10.1590/0366-69132021673843138","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48680578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling, equilibrium and kinetics of CO2 adsorption in LTA zeolite obtained from clay 粘土LTA沸石吸附CO2的模型、平衡和动力学
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843129
V. Ramos, D. Vedoy, P. C. C. D. Araújo, J. Marques, P. Quintela, E. Jesus
{"title":"Modeling, equilibrium and kinetics of CO2 adsorption in LTA zeolite obtained from clay","authors":"V. Ramos, D. Vedoy, P. C. C. D. Araújo, J. Marques, P. Quintela, E. Jesus","doi":"10.1590/0366-69132021673843129","DOIUrl":"https://doi.org/10.1590/0366-69132021673843129","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47763846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Preparation of novel cosmetic white pigment by pyrophosphate treatment of zinc oxide 焦磷酸盐处理氧化锌制备新型化妆品白色颜料
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843173
H. Onoda, K. Hayashi
{"title":"Preparation of novel cosmetic white pigment by pyrophosphate treatment of zinc oxide","authors":"H. Onoda, K. Hayashi","doi":"10.1590/0366-69132021673843173","DOIUrl":"https://doi.org/10.1590/0366-69132021673843173","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67183904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of time of hydrothermal heat treatment on mesoporous nano-TiO2 synthesis 水热热处理时间对介孔纳米tio2合成的影响
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843084
L. M. Santos, D. Silva, M. R. Santos, A. Machado
{"title":"Effect of time of hydrothermal heat treatment on mesoporous nano-TiO2 synthesis","authors":"L. M. Santos, D. Silva, M. R. Santos, A. Machado","doi":"10.1590/0366-69132021673843084","DOIUrl":"https://doi.org/10.1590/0366-69132021673843084","url":null,"abstract":"Mesoporous TiO 2 nanoparticles were synthesized by the sol-gel method and using hydrothermal treatment at 200 ºC during different time intervals, which allowed the evaluation of the time or the treatment on the structural, morphological, and optical properties of the oxides. TEM micrographs showed that the morphology of the materials was characterized by the presence of spherical clusters, while the crystalline phases of the anatase and brookite mixtures were analyzed by X-ray diffraction and Raman spectroscopy. A type IV profile was identified from the results of specific surface area, which is characteristic of the mesoporous material with strong and weak affinity. The band gap in the range of 3.29 and 3.40 eV, estimated by the Kubelka-Munk function, showed a gradual increase as a result of oxide crystallization. It was found that 8 h of treatment in a hydrothermal system was sufficient to synthesize a photocatalyst with optimal photocatalytic performance. This efficiency was probably based on a good correlation between physical and chemical factors, such as high surface area and porosity, the improved capability of photon adsorption in the visible range, crystallinity, and a favorable content of brookite.","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48531187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Evaluating the properties of cellular ceramics prepared with a granite dust and plantain (Musa paradisiaca) peel powder for external wall thermal insulation of buildings 用花岗岩粉尘和车前草剥离粉制备多孔陶瓷用于建筑外墙保温的性能评价
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843137
P. O. Odewole
{"title":"Evaluating the properties of cellular ceramics prepared with a granite dust and plantain (Musa paradisiaca) peel powder for external wall thermal insulation of buildings","authors":"P. O. Odewole","doi":"10.1590/0366-69132021673843137","DOIUrl":"https://doi.org/10.1590/0366-69132021673843137","url":null,"abstract":"The viability of preparing cellular ceramics suitable for external wall insulation of buildings was investigated using granite dust, ball clay, plantain peels, sodium silicate, and sodium hydroxide. The predetermined compositions of the raw materials were mixed homogeneously and then subjected to uniaxial pressing at 10 MPa. The formulated samples were oven-dried and sintered in a gas kiln at 850 °C for 3 h. The obtained cellular ceramics were then subjected to standard property tests. The results revealed water absorption of 19.5-41.7%, bulk density of 1.39-1.86 g/cm3, apparent porosity of 36.4-66.7%, thermal conductivity of 0.09-0.62 W/(m.K), and compressive strength of 0.9-18.4 MPa. From the results, the optimum sample of the cellular ceramics prepared is a potential thermal insulation material for load-bearing applications such as walling systems in buildings, where not only low thermal conductivity but also high mechanical strength is required.","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48993122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Alkaline activation of cement pastes with desulfurization slag 脱硫渣水泥浆的碱性活化研究
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843090
H. N. Costa, C. C. Noberto, L. A. Almeida, R. Nogueira, A. Cabral
{"title":"Alkaline activation of cement pastes with desulfurization slag","authors":"H. N. Costa, C. C. Noberto, L. A. Almeida, R. Nogueira, A. Cabral","doi":"10.1590/0366-69132021673843090","DOIUrl":"https://doi.org/10.1590/0366-69132021673843090","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48263370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of LaMnO3 and LaNiO3 type materials with calcium doping by the modified proteic method and evaluation for the dye removal efficiency 改性蛋白质法制备钙掺杂LaMnO3和LaNiO3型材料及脱色效果评价
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843146
A. Souza, J. R. Fernandes, J. F. S. Ribeiro, M. J. Souza, A. M. Garrido Pedrosa
{"title":"Development of LaMnO3 and LaNiO3 type materials with calcium doping by the modified proteic method and evaluation for the dye removal efficiency","authors":"A. Souza, J. R. Fernandes, J. F. S. Ribeiro, M. J. Souza, A. M. Garrido Pedrosa","doi":"10.1590/0366-69132021673843146","DOIUrl":"https://doi.org/10.1590/0366-69132021673843146","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67184164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural and dielectric properties of (1-x)Pb(Zr0.53Ti0.47)O3-xGdMnO3 ceramics (1-x)Pb(Zr0.53Ti0.47)O3-xGdMnO3陶瓷的结构和介电性能
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843164
Y. Bakhaled, L. Hamzioui, F. Kahoul, A. H. Hamzaoui, A. Midouni, M. Aillerie
{"title":"Structural and dielectric properties of (1-x)Pb(Zr0.53Ti0.47)O3-xGdMnO3 ceramics","authors":"Y. Bakhaled, L. Hamzioui, F. Kahoul, A. H. Hamzaoui, A. Midouni, M. Aillerie","doi":"10.1590/0366-69132021673843164","DOIUrl":"https://doi.org/10.1590/0366-69132021673843164","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47743563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Removal of Pb2+ and Zn2+ using modified Chocolate B clay: a study using statistical analysis, equilibrium isotherms, and adsorption kinetics 改性巧克力B粘土去除Pb2+和Zn2+:采用统计分析、平衡等温线和吸附动力学的研究
Cerâmica Pub Date : 2021-12-01 DOI: 10.1590/0366-69132021673843072
J. D. Mota, R. S. S. Cunha, M. Rodrigues
{"title":"Removal of Pb2+ and Zn2+ using modified Chocolate B clay: a study using statistical analysis, equilibrium isotherms, and adsorption kinetics","authors":"J. D. Mota, R. S. S. Cunha, M. Rodrigues","doi":"10.1590/0366-69132021673843072","DOIUrl":"https://doi.org/10.1590/0366-69132021673843072","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67183810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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