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Số người truy cập: 106,029,959

 Facile post-synthesis and gas sensing properties of highly porous NiO microspheres
Tác giả hoặc Nhóm tác giả: Nguyen Duc Cuong, Pham Long Quang, Nguyen Thi Ngoc Anh, Duong Tuan Quang, Pham Cam Nam, Khuc Quang Trung, Son Tang Nguyen, Nguyen Van Hieu
Nơi đăng: Sensors and Actuators A: Physical; Số: 296;Từ->đến trang: 110-120;Năm: 2019
Lĩnh vực: Chưa xác định; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
In this report, the porous NiO microspheres were fabricated by a post-simple route using α-Ni(OH)2 microflowers as precursor that were synthesized by a hydrothermal method without using surfactants. The three-dimensional (3D) NiO microspheres ranging from 2 to 10 μm in diameters composes of connected NiO nanoparticles, results in the sintering and phase transformation from primary α-Ni(OH)2 nanosheets to NiO nanoparticles during thermal procedures. The porous NiO microspheres-based sensor was tested with some toxic and flammable gases including H2S, NH3, H2, and CO. The hierarchical porous sensors exhibit high selectivity and sensitivity toward H2S in comparison with other interfering gases. The results may be related to some factors such as the catalytic effect of NiO on the oxidation of hydrosulfide, a moderately chemical affinity between Ni and S, and well-aligned porous architectures. ...
ABSTRACT
In this report, the porous NiO microspheres were fabricated by a post-simple route using α-Ni(OH)2 microflowers as precursor that were synthesized by a hydrothermal method without using surfactants. The three-dimensional (3D) NiO microspheres ranging from 2 to 10 μm in diameters composes of connected NiO nanoparticles, results in the sintering and phase transformation from primary α-Ni(OH)2 nanosheets to NiO nanoparticles during thermal procedures. The porous NiO microspheres-based sensor was tested with some toxic and flammable gases including H2S, NH3, H2, and CO. The hierarchical porous sensors exhibit high selectivity and sensitivity toward H2S in comparison with other interfering gases. The results may be related to some factors such as the catalytic effect of NiO on the oxidation of hydrosulfide, a moderately chemical affinity between Ni and S, and well-aligned porous architectures. ...
[ https://www.sciencedirect.com/science/article/abs/pii/S0924424719310027 ]
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