Effect of pH variation on the stability and structural properties of In(OH)3 nanoparticles synthesized by co-precipitation method

Indium hydroxide (In(OH)3) nanoparticles were synthesized at various pH values (8–11) by co-precipitation method. Its properties were characterized by X-ray diffractometer, Fourier transform infrared spectroscopy, Raman spectroscopy and transmission electron microscope. The electrostatic stability of nanoparticles is carried out through zeta potential measurement. The crystallite size of nanoparticles calculated by Scherrer equation has similar trend with the values obtained from William–Hall plot. TEM images show that the particles size is within the range of 11.76–20.76 nm. The maximum zeta potential is 3.68 mV associated with the smallest particle size distribution of 92.6 nm occurred at pH 10. Our work clearly confirms the crystallite size, stability and the morphology of In(OH)3 NPs are strongly depending on the pH of precursor solution.