{"id":1746,"date":"2014-03-10T13:09:00","date_gmt":"2014-03-10T13:09:00","guid":{"rendered":"https:\/\/chempublishers.sourcingoutfit.com\/?p=1746"},"modified":"2025-06-14T06:45:08","modified_gmt":"2025-06-14T06:45:08","slug":"pjc-0314","status":"publish","type":"post","link":"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/2014\/03\/10\/pjc-0314\/","title":{"rendered":"Improved Gas-Sensing Properties of Graphene-CoFe2O4\u00a0Composite Prepared via Homogeneous Precipitation"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1746\" class=\"elementor elementor-1746\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7bb7c3a e-flex e-con-boxed e-con e-parent\" data-id=\"7bb7c3a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-a0d5a3d e-con-full e-flex e-con e-child\" data-id=\"a0d5a3d\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ba04f2b elementor-widget elementor-widget-text-editor\" data-id=\"ba04f2b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\" align=\"center\">\n<tbody>\n<tr>\n<td>\n<div><strong>Research Article | Open Access<\/strong><\/div>\n<div class=\"item doi\"><span class=\"value\">Volume 4 | Issue 1 |&nbsp;<a href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/wp-content\/uploads\/sites\/2\/2025\/01\/PJC-v04.i01.p03.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.15228\/2014.v04.i01.p03<\/a><\/span><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<article class=\"obj_article_details\">\n<h4>Improved Gas-Sensing Properties of Graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;Composite Prepared via Homogeneous Precipitation<\/h4>\n<div class=\"row\">\n<div class=\"main_entry\">\n<p><span class=\"name\">F. Liu<\/span><\/p>\n<p>School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China<\/p>\n<p><span class=\"name\">X. Chu<\/span><\/p>\n<p>School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China<\/p>\n<p><\/p>\n<table border=\"0\" width=\"93%\" cellspacing=\"0\" cellpadding=\"0\" align=\"center\">\n<tbody>\n<tr>\n<td align=\"center\" valign=\"top\"><strong>Received<\/strong><br>12 Mar, 2014<\/td>\n<td align=\"center\" valign=\"top\"><strong>Accepted<\/strong><br>03 Sep, 2014<\/td>\n<td align=\"center\" valign=\"top\"><strong>Published<\/strong><br>03 Dec, 2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"item abstract\">\n<p class=\"ql-align-justify\">Before studying the gas-sensing properties of graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;composite, graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;composite with different mixing ratio are prepared via homogeneous precipitation method with urea as precipitator and characterized by X-ray diffraction using CuK\u03b1. The experimental results reveal that the average grain size of CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;with spinel-type structure is about 60 nm. The sensitive properties of pure CoFe<sub>2<\/sub>O<sub>4<\/sub>, 1%G-CoFe<sub>2<\/sub>O<sub>4<\/sub>, 2%G-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;and 5%G-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;are similar to the p-type semiconductor, and the sensor based on 5%G-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;shows the high sensitivity to ammonia, acetone vapor, formaldehyde vapor and acetaldehyde vapor with the temperature range from 80 to 300<sup>o<\/sup>C. Especially, the sensor based on 5%G-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;shows the sensitivity as high as 3 to 1000 ppm formaldehyde vapor when the operating temperature of sensor is 180<sup>o<\/sup>C. Thus, graphene CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;composite may be applied to measure the formaldehyde vapor at low temperature if the selectivity and response are improved further.<\/p>\n<\/div>\n<div class=\"item abstract\">\n<div>\n<h3 class=\"label\">How to Cite this paper?<\/h3>\n<div class=\"csl-entry\">\n<p><strong>APA-7 Style<\/strong><br>Liu, F., Chu, X. (2014). Improved Gas-Sensing Properties of Graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;Composite Prepared via Homogeneous Precipitation.&nbsp;<a href=\"https:\/\/doi.org\/10.15228\/2014.v04.i01.p03\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>, 4(1), 12-18<\/a>. https:\/\/doi.org\/10.15228\/2014.v04.i01.p03<\/p>\n<p><strong>ACS Style<\/strong><br>Liu, F.; Chu, X. Improved Gas-Sensing Properties of Graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;Composite Prepared via Homogeneous Precipitation.&nbsp;<a href=\"https:\/\/doi.org\/10.15228\/2014.v04.i01.p03\" target=\"_blank\" rel=\"noopener\"><em>Pak. J. Chem.<\/em>&nbsp;2014, 4, 12-18<\/a>. https:\/\/doi.org\/10.15228\/2014.v04.i01.p03<\/p>\n<p><strong>AMA Style<\/strong><br>Liu F, Chu X. Improved Gas-Sensing Properties of Graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;Composite Prepared via Homogeneous Precipitation.&nbsp;<a href=\"https:\/\/doi.org\/10.15228\/2014.v04.i01.p03\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>. 2014; 4(1): 12-18<\/a>. https:\/\/doi.org\/10.15228\/2014.v04.i01.p03<\/p>\n<p><strong>Chicago\/Turabian Style<\/strong><br>Liu, F., and X. Chu. 2014. &#8220;Improved Gas-Sensing Properties of Graphene-CoFe<sub>2<\/sub>O<sub>4<\/sub>&nbsp;Composite Prepared via Homogeneous Precipitation&#8221;&nbsp;<a href=\"https:\/\/doi.org\/10.15228\/2014.v04.i01.p03\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>&nbsp;4, no. 1: 12-18<\/a>. https:\/\/doi.org\/10.15228\/2014.v04.i01.p03<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"item copyright\">\n<p><a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" rel=\"license\"><img decoding=\"async\" src=\"https:\/\/i.creativecommons.org\/l\/by\/4.0\/88x31.png\" alt=\"Creative Commons License\"><\/a><\/p>\n<p>This work is licensed under a&nbsp;<a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" rel=\"license\">Creative Commons Attribution 4.0 International License<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d849940 e-con-full e-flex e-con e-child\" data-id=\"d849940\" data-element_type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Research Article | Open Access Volume 4 | Issue 1 |&nbsp;https:\/\/doi.org\/10.15228\/2014.v04.i01.p03 Improved Gas-Sensing Properties of Graphene-CoFe2O4&nbsp;Composite Prepared via Homogeneous Precipitation F. Liu School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China X. Chu School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China Received12 Mar, 2014 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1746","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Improved Gas-Sensing Properties of Graphene-CoFe2O4\u00a0Composite Prepared via Homogeneous Precipitation - Pakistan Journal of Chemistry<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/2014\/03\/10\/pjc-0314\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Improved Gas-Sensing Properties of Graphene-CoFe2O4\u00a0Composite Prepared via Homogeneous Precipitation - Pakistan Journal of Chemistry\" \/>\n<meta property=\"og:description\" content=\"Research Article | Open Access Volume 4 | Issue 1 |&nbsp;https:\/\/doi.org\/10.15228\/2014.v04.i01.p03 Improved Gas-Sensing Properties of Graphene-CoFe2O4&nbsp;Composite Prepared via Homogeneous Precipitation F. Liu School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China X. Chu School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. 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