title: Acetone gas sensor based on NiO/ZnO hollow spheres: Fast response and recovery, and low (ppb) detection limit.
abstract: NiO/ZnO composites were synthesized by decorating numerous NiO nanoparticles on the surfaces of well dispersed ZnO hollow spheres using a facile solvothermal method. Various kinds of characterization methods were utilized to investigate the structures and morphologies of the hybrid materials. The results revealed that the NiO nanoparticles with a size of ∼10nm were successfully distributed on the surfaces of ZnO hollow spheres in a discrete manner. As expected, the NiO/ZnO composites demonstrated dramatic improvements in sensing performances compared with pure ZnO hollow spheres. For example, the response of NiO/ZnO composites to 100ppm acetone was ∼29.8, which was nearly 4.6 times higher than that of primary ZnO at 275°C, and the response/recovery time were 1/20s, respectively. Meanwhile, the detection limit could extend down to ppb level. The likely reason for the improved gas sensing properties was also proposed.
authors.affiliation: State Key Laboratory of Automotive Simulation and Control, Jilin University, 5988 Renmin Street, Changchun 130012, People's Republic of China; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Liupeng
authors.initials: L
authors.lastname: Zhao
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Boqun
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Automotive Simulation and Control, Jilin University, 5988 Renmin Street, Changchun 130012, People's Republic of China; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. Electronic address: pengsun@jlu.edu.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Sun
authors.affiliation: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, People's Republic of China.
authors.forename: Qingji
authors.initials: Q
authors.lastname: Wang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Xishuang
authors.initials: X
authors.lastname: Liang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Tong
authors.initials: T
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Automotive Simulation and Control, Jilin University, 5988 Renmin Street, Changchun 130012, People's Republic of China; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. Electronic address: lugy@jlu.edu.cn.
authors.forename: Geyu
authors.initials: G
authors.lastname: Lu
keywords: Acetone; Fast response/recovery; Hollow spheres; NiO/ZnO composites; p-n heterostructure