کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7141212 1462031 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hollow CuFe2O4/α-Fe2O3 composite with ultrathin porous shell for acetone detection at ppb levels
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Hollow CuFe2O4/α-Fe2O3 composite with ultrathin porous shell for acetone detection at ppb levels
چکیده انگلیسی
Hollow CuFe2O4/α-Fe2O3 composites with ultrathin porous shell were successfully prepared by a facile template-induced method, which involves the self-assembly of Fe3+ ions on the surface of Cu@carbon microspheres and the subsequent transformation to CuFe2O4/α-Fe2O3 through thermal oxidation and solid phase reaction. The as-prepared CuFe2O4/α-Fe2O3 hollow spheres are characterized by uniform diameter of about ∼210 nm and ultrathin porous shell, which could facilitate the diffusion of reactant gases and enhance the utility ratio of the sensing body. To demonstrate such unique materials might bring about more excellent gas sensing property, a comparison of the sensing performance between CuFe2O4/α-Fe2O3 composites and pure α-Fe2O3 was carried out. As expected, the sensors based on the as-prepared CuFe2O4/α-Fe2O3 composites exhibit much higher sensitivity, faster response/recover speed, and lower detection limit than the pristine α-Fe2O3 hollow spheres. It is believed that the enhanced sensing performance could be attributed to hollow and porous architectures of CuFe2O4/α-Fe2O3 composites, the resistance modulation effects of heterojunction as well as catalytic properties of CuFe2O4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 258, 1 April 2018, Pages 436-446
نویسندگان
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