Co-TPP functionalized carbon nanotube composites for detection of nitrobenzene and chlorobenzene vapours

Bulletin of materials science

A L Verma¹  G S S SAINI²  Swasti Saxena¹ 

[1]Amity Institute of Applied Sciences, Amity University, Noida 201 303 (U.P.), India$$Amity Institute of Applied Sciences, Amity University, Noida 201 303 (U.P.), IndiaAmity Institute of Applied Sciences, Amity University, Noida 201 303 (U.P.), India$$

[2]Department of Physics, Punjab University, Chandigarh 160 014, India$$Department of Physics, Punjab University, Chandigarh 160 014, IndiaDepartment of Physics, Punjab University, Chandigarh 160 014, India$$

关键词: Electrical properties;    nanostructure materials;    porphyrin functionalized carbon nanotubes;    sensor for chlorobenzene and nitrobenzene vapour.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

We report preparation of nanocomposites by non-covalent functionalization of carbon nanotubes (CNTs) with metal-tetraphenylporphyrins (M-TPP). Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM) results suggest formation of nanosized clusters of Co-TPP around the CNTs surface. X-ray diffraction studies indicate electronic charge re-distribution and strong interactions among CNTs and Co-TPP on functionalization. The films of the hybrid CNT�?�M-TPP nanocomposite exhibit change in conductivity on exposure to some chemical vapours. In the present work, the films prepared from the cobalt-TPP functionalized CNTs hybrid composites have been investigated for the detection of chlorobenzene (CB) and nitrobenzene (NB) vapours at room temperature. The films show response time of few seconds on exposure to both the NB and CB vapours while the recovery time for NB is significantly different compared to CB. A distinct and highly reproducible response pattern in the relative changes in resistance, recovery and response times on exposure to the vapours of NB, CB and few other chemicals at room temperature has been exploited to differentiate CB and NB vapours from one another.

【 授权许可】

Unknown