Superhydrophobic mesoporous material as a pH-sensitive organic dye adsorbent

• One-pot synthesis of superhydrophobic mesoporous materials.
• Stable surface properties in acidic and basic media.
• Superhydrophobic or superhydrophilic materials for methylene blue adsorption.
• pH-sensitive dye adsorption behavior.

A superhydrophobic material was synthesized using a one-pot approach via the self-hydrolysis and condensation of polymethylhydrosiloxane (PMHS) under a base catalyst in ethanol and water media. The obtained superhydrophobic polymethylhydroxysiloxane (PMHOS) material was stable up to temperatures as high as 500 °C, even under strong acidic and basic pH conditions. The micro–nano particles of PMHOS exhibited a hierarchical morphology with a mesoporous structure. The superhydrophobic PMHOS, however, become superhydrophilic by calcination at 600 °C. The superhydrophobic and superhydrophilic PMHOS exhibited a good ability to adsorb organic dyes at a certain pH (pH 12).

A highly, temperature and pH stable superhydrophobic micro–nano mesoporous material was synthesized in one-pot using polymethylhydrosiloxane (PMHS), and used for the adsorption of organic dyes.Figure optionsDownload as PowerPoint slide