Open AccessEffects of pure and mixed stabilizers on opto-electrical properties and morphology of TiO2 nanoparticles synthesized by sol-gel method
Author(s) -
Muhammad Ayyaz,
Nurul Huda,
Faiz Rasool,
H Sami-ur-Rehman,
Anam Mehmood,
Muhammad Yasin Naz,
Shazia Shukrullah,
Abdul Ghaffar
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/863/1/012029
Subject(s) - crystallinity , materials science , nanoparticle , scanning electron microscope , titanium dioxide , photocatalysis , nanomaterials , grain size , sol gel , titanium , band gap , chemical engineering , particle size , nanotechnology , nuclear chemistry , catalysis , chemistry , composite material , organic chemistry , metallurgy , optoelectronics , engineering
Titanium dioxide (TiO 2 ) is acknowledged as the most advanced nanomaterial. It has been used in certain application, such as semiconductor, photocatalyst, dye solar cells, paints, dyes, cosmetics, antifogging coatings, self-cleaning windows, etc. Although TiO 2 nanoparticles occur naturally in mineral form, but the particles are also being synthesized through different well-known techniques. The past literature reveals that sol-gel methodology is considered as the most attractive and suitable technique for the preparation of such kind of nanoparticles. This article reports the effects of three different stabilizers (HCl, HNO 3 and mixture of HCl+HNO 3 ) on the morphological and opto-electrical properties of TiO 2 nanoparticles. The nanoparticles of TiO 2 were synthesized through sol-gel process by using titanium tetra isopropoxide (TTIP) as precursor in a solution of deionized water and isopropanol at 80 °C under constant stirring. The synthesized TiO 2 nanoparticles were characterized through X-ray Diffractometry (XRD), Scanning electron microscopy (SEM) and UV-Visible spectrophotometry. The grain size with perfect crystallinity obtained through XRD were in good agreement with SEM results. The grain size of the prepared TiO 2 nanoparticles using HCl, HNO 3 and (HCl+HNO 3 ) were 3 nm, 2.8 nm and 3.3 nm, respectively. The optical characterization of TiO 2 revealed band gap energy values of 4.10 eV, 6.16 eV and 6.14 eV corresponding to absorption edges at 302 nm, 201.2 nm and 201.73 nm, respectively. The smaller grain sizes were having larger band gaps.