Journal of Materials Chemistry A p. 1096 - 1104 (2016)
Update date:2022-08-17
Topics:
Wu, Hao
Chen, Zhimin
Zhang, Jialin
Wu, Feng
He, Chunying
Wang, Bin
Wu, Yiqun
Ren, Zhiyu
Cost-efficient, highly sensitive and stable sensing materials play a key role in developing H2S sensors. Herein, tetra-β-carboxyphenyloxyphthalocyanine cobalt(ii) (cPcCo) has been successfully bonded on the surface of acidified multiwalled carbon nanotubes (aCNTs) by a facile two-step condensation reaction in the presence of N,N′-dicyclohexylcarbodiimide (DCC), using hydroquinone (HQ), p-aminophenol (PAP), and p-phenylenediamine (PPD) as linking molecules, respectively. The obtained cPcCo-B-aCNT (B= HQ, PAP, and PPD) hybrids display good dispersibility in ethanol, which is beneficial to construct uniform sensing devices. The cPcCo-B-aCNT sensors, with a loose network-like structure, present abundant exposed sensing sites, oriented transmission of charges, and unimpeded pathways for H2S diffusion, which endow the cPcCo-B-aCNT hybrids with excellent sensing performance, in terms of sensitivity, reliability, reproducibility, and detection limit. The detection limit of the sensors composed of cPcCo-B-aCNT hybrids towards H2S reaches the ppb-level at room temperature, which is about the same as the odor threshold level for humans. For the cPcCo-HQ-aCNT sensor, the response to H2S varies linearly with respect to its concentration from 20 to 160 ppb and from 320 to 2560 ppb, with the highest gas response of 2.5% to 80 ppb H2S and a low detection limit of 5 ppb. Furthermore, the linking molecules play a critical role in the sensitivity of H2S, as evidenced from the current-voltage characteristics. The systematic study developed here provides a valid way to fabricate other high-efficient H2S sensors.
View MoreOren Hydrocarbons (Qingdao) Co., Ltd.
Contact:+86-532-68607667-801
Address:Room 3 # 302, No.9 Qingyun Road, Qingdao, China
SICHUAN TONGSHENG AMINOACID CO.LTD
website:http://www.aminoacid.cc
Contact:86-838-2274206/2850606
Address:Room 1-11-1,No.19 of North TianShan Road,Deyang,Sichuan China
Suzhou BEC Fine Chemicals Co., Ltd.
website:http://www.bek.com.cn
Contact:0512-68095917 18913193865
Address:6, Jin Shan Road, Suzhou New District, 215011 China Suzhou Nations Pharmaceutical Innovation Center Inside
Shanghai Sunway Pharmaceutical Technology Co.,Ltd.
Contact:+86-21-5161 3915
Address:Shanghai YangPu
TIANJIN NORTH JINHENG CHEMICAL PLANT.
Contact:0086-22-59952083
Address:DongShigu Country In JiXian TianJin China
Doi:10.1016/0040-4039(94)02407-3
(1995)Doi:10.1021/jo00078a051
(1993)Doi:10.1007/s00044-017-1953-3
(2017)Doi:10.1021/jo00055a041
(1993)Doi:10.1021/om049213d
(2005)Doi:10.1021/jm00346a008
(1982)