{"id":34942,"date":"2022-08-11T07:30:43","date_gmt":"2022-08-11T10:30:43","guid":{"rendered":"https:\/\/www.funverde.org.br\/blog\/?p=34942"},"modified":"2025-10-07T10:04:10","modified_gmt":"2025-10-07T13:04:10","slug":"nano-esponjas-de-grafeno-filtrando-residuos-industriais","status":"publish","type":"post","link":"https:\/\/www.funverde.org.br\/blog\/nano-esponjas-de-grafeno-filtrando-residuos-industriais\/","title":{"rendered":"Nano-esponjas de grafeno filtrando res\u00edduos industriais"},"content":{"rendered":"<p class=\"ArticlePage-headline\"><span class=\"ArticlePage-authorBy\" style=\"color: var(--wpex-text-2); font-family: var(--wpex-body-font-family, var(--wpex-font-sans)); font-size: 16px;\">Por\u00a0 <\/span><a style=\"font-family: var(--wpex-body-font-family, var(--wpex-font-sans)); font-size: 16px;\" href=\"https:\/\/newatlas.com\/author\/michael-irving\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"Michael Irving\" data-cms-ai=\"0\">Michael Irving<\/a> &#8211; 05 de agosto de 2022 &#8211; Pesquisadores desenvolveram nanoesponjas feitas de estruturas org\u00e2nicas covalentes (COFs) em grafeno que podem realmente filtrar poluentes industriais da \u00e1gua &#8211; Imagem &#8211; <a class=\"Link\" style=\"font-family: var(--wpex-body-font-family, var(--wpex-font-sans));\" href=\"https:\/\/depositphotos.com\/\" target=\"_blank\" rel=\"noopener\" data-cms-ai=\"0\">Depositphotos<\/a><\/p>\n<div class=\"ArticlePage-lead\">\n<div class=\"FullscreenCarousel-cover\">\n<div class=\"FullscreenCarousel-cover-count\"><\/div>\n<\/div>\n<div class=\"FullscreenCarousel-slides flickity-enabled is-draggable\" tabindex=\"0\"><span style=\"color: var(--wpex-text-2); font-family: var(--wpex-body-font-family, var(--wpex-font-sans));\">Engenheiros da Universidade de Viena desenvolveram um novo material comp\u00f3sito que faz uma filtragem eficiente na remo\u00e7\u00e3o de poluentes org\u00e2nicos da \u00e1gua. <\/span><\/div>\n<div tabindex=\"0\"><\/div>\n<div class=\"FullscreenCarousel-slides flickity-enabled is-draggable\" tabindex=\"0\"><span style=\"color: var(--wpex-text-2); font-family: var(--wpex-body-font-family, var(--wpex-font-sans));\">O sistema usa \u201cnano-esponjas\u201d superporosas embutidas em uma folha de grafeno.<\/span><\/div>\n<\/div>\n<div class=\"ArticlePage-articleContainer\">\n<div class=\"ArticlePage-articleBody\">\n<div class=\"RichTextArticleBody\">\n<div class=\"RichTextArticleBody-body RichTextBody\">\n<div id=\"native_article_mid_desktop\" data-google-query-id=\"CK_uoeqPvPkCFRQzuQYdkp8GCA\">\n<div id=\"google_ads_iframe_\/1007667\/native_article_mid_desktop_0__container__\"><\/div>\n<\/div>\n<p><span>A chave para os novos filtros \u00e9 uma classe de material chamada estruturas org\u00e2nicas covalentes (COFs).\u00a0<\/span><\/p>\n<p><span>Essas estruturas s\u00e3o extremamente porosas, dando-lhes uma\u00a0<\/span><a class=\"Link\" href=\"https:\/\/newatlas.com\/synthetic-material-world-record-surface-area\/24071\/?itm_source=newatlas&amp;itm_medium=article-body\" target=\"_blank\" rel=\"noopener\" data-cms-ai=\"0\"><span>enorme \u00e1rea de superf\u00edcie<\/span><\/a><span> contida em um pequeno espa\u00e7o, o que significa que s\u00e3o eficazes de segurar grandes quantidades de mol\u00e9culas.<\/span><\/p>\n<p><a href=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/usina-termica.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-34943\" src=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/usina-termica.jpg\" alt=\"\" width=\"834\" height=\"455\" srcset=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/usina-termica.jpg 834w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/usina-termica-300x164.jpg 300w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/usina-termica-768x419.jpg 768w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/usina-termica-600x327.jpg 600w\" sizes=\"(max-width: 834px) 100vw, 834px\" \/><\/a><\/p>\n<p><span>Materiais relacionados conhecidos como estruturas metal-org\u00e2nicas (MOFs) est\u00e3o sendo pesquisados para uso na <\/span><a class=\"Link\" href=\"https:\/\/newatlas.com\/environment\/magnetic-sponge-captures-carbon-record-energy-efficiency\/?itm_source=newatlas&amp;itm_medium=article-body\" target=\"_blank\" rel=\"noopener\" data-cms-ai=\"0\"><span>captura de carbono<\/span><\/a><span>,\u00a0<\/span><a class=\"Link\" href=\"https:\/\/newatlas.com\/environment\/metal-organic-framework-desalination-seawater\/?itm_source=newatlas&amp;itm_medium=article-body\" data-cms-ai=\"0\"><span>dessaliniza\u00e7\u00e3o<\/span><\/a><span>\u00a0ou extra\u00e7\u00e3o de\u00a0<\/span><a class=\"Link\" href=\"https:\/\/newatlas.com\/materials\/harvester-drinking-water-thin-air\/?itm_source=newatlas&amp;itm_medium=article-body\" target=\"_blank\" rel=\"noopener\" data-cms-ai=\"0\"><span>\u00e1gua pot\u00e1vel<\/span><\/a><span>\u00a0do ar, e os COFs podem ter um conjunto semelhante de fun\u00e7\u00f5es.<\/span><\/p>\n<p><span>Para o novo estudo, os pesquisadores se concentraram em usar um COF para remover corantes org\u00e2nicos da \u00e1gua.\u00a0<\/span><\/p>\n<p><span>Esses produtos qu\u00edmicos s\u00e3o um poluente comum de \u00e1guas residuais industriais e podem ser t\u00f3xicos e cancer\u00edgenos \u2013 para n\u00e3o mencionar que s\u00e3o dif\u00edceis de remover.<\/span><\/p>\n<p><span>A equipe ajustou o COF para faz\u00ea-lo conter seletivamente as mol\u00e9culas de corante org\u00e2nico. <\/span><\/p>\n<p><span>Isso envolve tornar os poros da forma e tamanho certos \u2013 entre 0,8 e 1,6 nan\u00f4metros \u2013 e dar \u00e0 superf\u00edcie uma carga negativa, para atrair as mol\u00e9culas de corante carregadas positivamente.<\/span><\/p>\n<p><span>Mas havia outro obst\u00e1culo a ser superado.\u00a0<\/span><\/p>\n<p><span>Quando o material \u00e9 usado em sua forma em p\u00f3, os poros nas bordas externas se enchem primeiro de mol\u00e9culas, deixando os do centro vazios e essencialmente in\u00fateis.\u00a0<\/span><\/p>\n<p><span>Assim, a equipe desenvolveu uma maneira de espalhar o COF cultivando-o em uma folha de grafeno.<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><a href=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-34946\" src=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_1.jpg\" alt=\"\" width=\"618\" height=\"375\" srcset=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_1.jpg 866w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_1-300x182.jpg 300w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_1-768x466.jpg 768w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_1-600x364.jpg 600w\" sizes=\"(max-width: 618px) 100vw, 618px\" \/><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-34945\" src=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_2.jpg\" alt=\"\" width=\"638\" height=\"478\" srcset=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_2.jpg 710w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_2-300x225.jpg 300w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_2-600x450.jpg 600w\" sizes=\"(max-width: 638px) 100vw, 638px\" \/><\/p>\n<p>Um diagrama comparando o COF em massa regular com a vers\u00e3o mais eficiente cultivada em grafeno &#8211; Imagem: <span style=\"color: var(--wpex-text-2); font-family: var(--wpex-body-font-family, var(--wpex-font-sans));\">Changxia Li, Freddy Kleitz e outros<\/span><\/p>\n<div class=\"ArticlePage-articleContainer\">\n<div class=\"ArticlePage-articleBody\">\n<div class=\"RichTextArticleBody\">\n<div class=\"RichTextArticleBody-body RichTextBody\">\n<p><span>O resultado final foi uma camada de COF de dois nan\u00f4metros de espessura em uma camada de um \u00fanico \u00e1tomo de grafeno, o que aumentou a capacidade m\u00e1xima do material de reter mol\u00e9culas de corante org\u00e2nico.\u00a0<\/span><\/p>\n<p><span>O grafeno em si tem poros bastante grandes, permitindo que a \u00e1gua flua rapidamente enquanto o COF faz seu trabalho.<\/span><\/p>\n<p><span>\u201cOs grandes poros da rede de grafeno em combina\u00e7\u00e3o com a camada ultrafina de COF e seu grande n\u00famero de locais de adsor\u00e7\u00e3o, portanto, permitem um tratamento de \u00e1guas residuais particularmente r\u00e1pido e eficiente\u201d, disseram os pesquisadores.<\/span><\/p>\n<p><span>A t\u00e9cnica promete ter uma boa rela\u00e7\u00e3o custo x benef\u00edcio de acordo com a equipe.<\/span><\/p>\n<p><a href=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-34947\" src=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-scaled.jpg\" alt=\"\" width=\"798\" height=\"331\" srcset=\"https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-scaled.jpg 2560w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-300x124.jpg 300w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-1024x424.jpg 1024w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-768x318.jpg 768w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-1536x636.jpg 1536w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-2048x848.jpg 2048w, https:\/\/www.funverde.org.br\/blog\/wp-content\/uploads\/2022\/08\/filtro-grapheno_3-600x248.jpg 600w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/a><\/p>\n<p><em><span style=\"font-size: 14px;\">a) Forma\u00e7\u00e3o e estrutura de poros do COF-SO\u00a0<sub>3<\/sub> na b) Padr\u00e3o de DRX em p\u00f3 de COF-SO\u00a0<sub>3<\/sub>\u00a0Na a granel.\u00a0O padr\u00e3o simulado \u00e9 apresentado como refer\u00eancia.\u00a0c) Imagem SEM de COF-SO\u00a0<sub>3<\/sub>\u00a0Na em massa.\u00a0d) O procedimento de s\u00edntese para CGA. (<a href=\"https:\/\/ifc-riodosul.edu.br\/forcult\/?page_id=206\">ifc-riodosul.edu.br<\/a>) \u00a0e) Fotografias do CGA (esquerda) e do p\u00f3 de COF-SO\u00a0<sub>3<\/sub>\u00a0Na a granel (direita).<\/span><\/em><\/p>\n<p><span>N\u00e3o \u00e9 necess\u00e1rio usar muito grafeno, e o COF pode ser limpo e reutilizado.<\/span><\/p>\n<p><span>A pesquisa foi publicada na revista\u00a0<\/span><i><a class=\"Link\" href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/anie.202206564\" target=\"_blank\" rel=\"noopener\" data-cms-ai=\"0\"><span>Angewandte Chemie<\/span><\/a><\/i><span>.<\/span><\/p>\n<p><span>Fonte:\u00a0<\/span><a class=\"Link\" href=\"https:\/\/medienportal.univie.ac.at\/media\/aktuelle-pressemeldungen\/detailansicht\/artikel\/nano-schwaemme-mit-potenzial-fuer-die-abwasseraufbereitung\/\" target=\"_blank\" rel=\"noopener\" data-cms-ai=\"0\"><span>Universidade de Viena<\/span><\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Por\u00a0 Michael Irving &#8211; 05 de agosto de 2022 &#8211; Pesquisadores desenvolveram nanoesponjas feitas de estruturas org\u00e2nicas covalentes (COFs) em grafeno que podem realmente filtrar poluentes industriais da \u00e1gua &#8211; Imagem &#8211; Depositphotos Engenheiros da Universidade de Viena desenvolveram um novo material comp\u00f3sito que faz uma filtragem eficiente na remo\u00e7\u00e3o de poluentes org\u00e2nicos da \u00e1gua.&hellip;<\/p>\n","protected":false},"author":2,"featured_media":34944,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[90,59,65,70,71],"post_series":[],"class_list":["post-34942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geral","tag-ambiente-ambiental-environment-environmental-meio-ambiente","tag-poluicao-pollution","tag-recursos-naturais-natural-resource","tag-controle-populacional-controle-de-natalidade-birth-control-superpopulacao-contracepcao-contraceptivo","tag-sustentabilidade-viver-sustentavelmente-consumo-sustentavel","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - 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