en Research Paper Research Paper <span lang="EN" style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">We report a simple and practical approach for the easy production of superhydrophobic coatings based on TiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">-SiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">@PDMS. In this study, we used tetraethylorthosilicate (TEOS) and titanium tetraisopropoxide (TTIP) as a precursor for the sol-gel synthesis of SiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;"> and TiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">, respectively. Afterward, the surface of nanoparticles was modified by </span></span></span></span><span style="font-size:12.0pt"><span style="background:yellow"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">1,1,1,3,3,3-hexamethyldisilazane</span></span></span></span></span><span lang="EN" style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;"> (HMDS) before being combined with polydimethylsiloxane (PDMS). The hydrophobic property of coatings was evaluated by static contact angle measurements. The phase composition and structural evolution of the coatings were examined by </span></span></span></span><span style="font-size:12.0pt"><span style="background:yellow"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">X-ray diffraction</span></span></span></span></span><span style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;"> (</span></span></span></span><span lang="EN" style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">XRD), and </span></span></span></span><span style="font-size:12.0pt"><span style="background:yellow"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">Fourier transform infrared spectroscopy</span></span></span></span></span><span lang="EN" style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;"> (FTIR) analysis. It was shown that changing the weight ratio of the solution composition of the coating can affect the hydrophobicity of the surface. The </span><span style="background:yellow"><span style="background-color:#ffffff;">best</span></span><span style="background-color:#ffffff;"> sample has shown a superhydrophobic property with a 153˚ contact angle which contained (75%TiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">-25%SiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">)_{<span style="background-color:#ffffff;"> </span>}and PDMS at a weight ratio of 1:1. Moreover, the results showed that the superhydrophobic coating retains its hydrophobic properties up to a temperature of 450 ˚C, and at higher temperatures, it converts to a super hydrophilic with a </span></span></span></span><span style="font-size:12.0pt"><span style="background:yellow"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">water contact angle</span></span></span></span></span><span lang="EN" style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;"> close to 0 ˚. </span></span></span></span><span style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">The SiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">-TiO</span>_{<span style="background-color:#ffffff;">2</span>}<span style="background-color:#ffffff;">@PDMS coating degrades methylene blue by about 55% and was shown to be capable of photocatalytically decomposing organic pollutants.</span></span></span></span> Superhydrophobic coating,Photocatalytic,Sol-gel,Silica,Titania 1 11 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-4800-1&slc_lang=en&sid=1 amirreza Sazvar amir_sazvar@yahoo.com 1800319475328460015991 1800319475328460015991 Yes Master of Materials Engineering, School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran Seyed mohammad saeed Alavi s.mohammadsaeedalavi@gmail.com 1800319475328460015992 1800319475328460015992 No Bachelor of Materials Engineering, School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran. E-mail: hossein Sarpoolaky hsarpoolaky@iust.ac.ir 1800319475328460015993 1800319475328460015993 No Professor, Faculty Member of Materials and Metallurgy Engineering Department, School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran.