One-step Synthesis of Ordered Pd@TiO2 Nanofibers Array Film as Outstanding NH3 Gas Sensor at Room Temperature

Hongyuan Wu; Haitao Huang; Jiao Zhou; Dahai Hong; Muhammad Ikram; Afrasiab Ur Rehman; Li Li; Keying Shi

doi:10.1038/s41598-017-15319-3

One-step Synthesis of Ordered Pd@TiO₂ Nanofibers Array Film as Outstanding NH₃ Gas Sensor at Room Temperature

Sci Rep. 2017 Nov 7;7(1):14688. doi: 10.1038/s41598-017-15319-3.

Authors

Hongyuan Wu^{1

2}, Haitao Huang³, Jiao Zhou¹, Dahai Hong¹, Muhammad Ikram¹, Afrasiab Ur Rehman¹, Li Li^{4

5}, Keying Shi⁶

Affiliations

¹ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education. School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, P.R. China.
² College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, P.R. China.
³ The third affiliated hospital of Qiqihar Medical University, Qiqihar, 161006, P.R. China.
⁴ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education. School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, P.R. China. llwjjhlju@sina.cn.
⁵ Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, P. R. China. llwjjhlju@sina.cn.
⁶ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education. School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, P.R. China. shikeying2008@163.com.

Abstract

The one dimensional (1D) ordered porous Pd@TiO₂ nanofibers (NFs) array film have been fabricated via a facile one-step synthesis of the electrospinning approach. The Pd@TiO₂ NFs (PTND3) contained Pd (2.0 wt %) and C, N element (16.2 wt %) display high dispersion of Pd nanoparticles (NPs) on TiO₂ NFs. Adding Pd meshed with C, N element to TiO₂ based NFs might contribute to generation of Lewis acid sites and Brønsted acid sites, which have been recently shown to enhance NH₃ adsorption-desorption ability; Pd NPs could increase the quantity of adsorbed O₂ on the surface of TiO₂ based NFs, and accelerated the O₂ molecule-ion conversion rate, enhanced the ability of electron transmission. The response time of PTND3 sensor towards 100 ppm NH₃ is only 3 s at room temperature (RT). Meantime, the response and response time of the PTND3 to the NH₃ is 1 and 14s even at the concentration of 100 ppb. Therefore, the ordered Pd@TiO₂ NFs array NH₃ sensor display great potential for practical applications.

Publication types

Research Support, Non-U.S. Gov't