| Title: | Nanostructural evolution of hydrothermally grown SrTiO(3)perovskite and its implementation in gaseous phase detection of ethanol |
| Author(s): | Bhardwaj R; Jena SS; Srikar VS; Ghosh S; Hazra A; |
| Address: | "Dept. of Electrical and Electronics Engineering, Birla Institute of Technology and Science (BITS)-Pilani, Vidya Vihar, Rajasthan 333031, India. Dept. of Chemical Engineering, Birla Institute of Technology and Science (BITS)-Pilani, Vidya Vihar, Rajasthan 333031, India" |
| ISSN/ISBN: | 1361-6528 (Electronic) 0957-4484 (Linking) |
| Abstract: | "A group of SrTiO(3)nanostructures with unique nano-architecture have been synthesized in the current study. Sol-gel derived TiO(2)nanoparticles along with Sr(OH)(2)solution was processed with facial hydrothermal reaction at 180 degrees C and highly stable and distinct morphologies of SrTiO(3)were developed after different reaction time. Nanobush, nanograss, nanorod and nanosphere morphologies were created after 10, 14, 18 and 24 h of hydrothermal reaction. SrTiO(3)nanosphere was transformed into nano-hollow sphere morphology after thermal annealing at 600 degrees C. Detailed morphological, structural and chemical characterizations were carried out for all the distinct nanoforms of SrTiO(3)where they exhibited high crystallinity, and chemical stability along with excellent surface properties like high porosity, roughness, and large effective surface area. Due to having rich surface properties, all the SrTiO(3)morphologies were then implemented for gaseous phase detection of multiple volatile organic compounds (VOCs). However, all the SrTiO(3)nanoforms showed ethanol selective behavior among all the VOCs. Nanograss and nano-hollow spheres exhibited excellent ethanol sensing with 69 and 78 response values (R(v)/R(a)) in 50 ppm ethanol at 150 degrees C with appreciably fast response/recovery times of 36 s/34 s and 150 s/ 58 s, respectively. Additionally, all the SrTiO(3)nanostructures exhibited anti-humidity characteristics and potential sensing in humid ambient (up to 80% RH). Later, the ethanol selective behavior of SrTiO(3)was established by density functional theory simulations which envisaged the highest negative adsorption energy and smallest distance (r) for ethanol molecule, implying stable adsorption with SrTiO(3)(110) system" |
| Keywords: | SrTiO3 nanostructures SrTiO3-TiO2 heterojunction VOC sensing humidity tolerance stability; |
| Notes: | "PubMed-not-MEDLINEBhardwaj, Radha Jena, Sushri Soumya Srikar, Valiveru Sai Ghosh, Sarbani Hazra, Arnab eng England 2023/07/06 Nanotechnology. 2023 Jul 19; 34(40). doi: 10.1088/1361-6528/ace44d" |
