Highly active and porous single-crystal In2O3 nanosheet for NOx gas sensor with excellent response at room temperature. Issue 53 (3rd July 2017)

• Record Type: Journal Article
• Authors: Sun, Li; Fang, Wencheng; Yang, Ying; Yu, Hui; Wang, Tingting; Dong, Xiangting; Liu, Guixia; Wang, Jinxian; Yu, Wensheng; Shi, Keying
• Is Part Of: RSC advances. Volume 7:Issue 53(2017)
• Page Start: 33419
• Page End: 33425
• Publication Date: 2017-07-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra05446g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Porous single-crystal In2 O3 nanosheet was well-designed and prepared through calcination after liquid reflux, then exhibited a distinguished response, fast response time to NO x with good selectivity and low detection limit at room temperature. Abstract : Porous single-crystal In2 O3 nanosheet (ps-In2 O3 NS) was designed and prepared through a method of calcination after liquid reflux. Compared with the other In2 O3 with different surface morphologies, the ps-In2 O3 NS has gas sensing properties towards NO x at room temperature. Gas sensing data strongly demonstrate that this porous single-crystal In2 O3 nanosheet exhibits a distinguished response (89.48) and fast response time (16.6 s) to 97.0 ppm NO x . Meanwhile, the ps-In2 O3 NS sensor presents a favorable linearity and good selectivity, and the detection of NO x is down to ppb levels at room temperature. The enhancement of the sensing response is attributed to the porous, single-crystal and two dimensional nanosheet structure of the synthesized ps-In2 O3 NS, which has much higher BET surface area, effective gas diffusion of slit pores and thus provides more active sites for the reaction of NO x with surface-adsorbed oxygen ions. This work would be important for the low-cost and high performance of the In2 O3 material with highly promising applications in gas sensors.