Jena Kishore K, Mittal Hemant, Wadi Vijay S, Mani Ganesh Kumar, Alhassan Saeed M
Department of Chemical Engineering , Khalifa University , SAN Campus , Abu Dhabi , United Arab Emirates (UAE).
Micro/Nano Technology Center , Tokai University (Shonan Campus) , 4-1-1 Kitakanamae , Kanagawa 259-1292 , Japan.
ACS Appl Mater Interfaces. 2019 Aug 21;11(33):30247-30258. doi: 10.1021/acsami.9b09140. Epub 2019 Aug 12.
In this present work, TiO-SiO-sulfur (Ti-Si-S) nanohybrid material was successfully prepared using TiO nano powder, TEOS sol-gel precursor, and elemental sulfur as raw material by sol-gel process and hydrothermal method at 120 °C temperature. Raman spectroscopy, XRD, SEM, TEM, and N absorption-desorption characterized the synthesized nanohybrid material. The characterization results confirmed the homogeneous distribution of sulfur in the nanohybrid material. The size of the Ti-Si-S nanohybrid material is vary between 20 and 40 nm and the surface areas of the nanohybrid material was measured using N absorption-desorption, which showed value of 57.2 m g. The potential of Ti-Si-S nanohybrid material as an adsorbent was further tested to adsorb methylene blue (MB) from aqueous solution. Adsorption performance of hybrid material was highly influenced by the solution pH and mass of adsorbent. The adsorption of MB using Ti-Si-S nanohybrid material was homogeneous monolayer adsorption, which followed the Langmuir adsorption isotherm with a value of 804.80 mg g and pseudo-second-order rate equation. The dye diffusion mechanism partially followed both intraparticle and liquid film diffusion mechanisms. Thermodynamics studies predicted the spontaneous and endothermic nature of the whole adsorption process. The Ti-Si-S nanohybrid material was used for six repeated cycles of MB dye adsorption-desorption.
在本工作中，以TiO纳米粉末、TEOS溶胶 - 凝胶前驱体和元素硫为原料，通过溶胶 - 凝胶法和水热法在120℃温度下成功制备了TiO - SiO - 硫（Ti - Si - S）纳米杂化材料。采用拉曼光谱、XRD、SEM、TEM和N吸附 - 脱附对合成的纳米杂化材料进行了表征。表征结果证实了硫在纳米杂化材料中的均匀分布。Ti - Si - S纳米杂化材料的尺寸在20至40nm之间变化，并且使用N吸附 - 脱附测量了纳米杂化材料的表面积，其值为57.2m²/g。进一步测试了Ti - Si - S纳米杂化材料作为吸附剂从水溶液中吸附亚甲基蓝（MB）的潜力。杂化材料的吸附性能受溶液pH值和吸附剂质量的影响很大。使用Ti - Si - S纳米杂化材料吸附MB是均匀单层吸附，遵循朗缪尔吸附等温线，其值为804.80mg/g，以及准二级速率方程。染料扩散机制部分遵循颗粒内扩散和液膜扩散机制。热力学研究预测了整个吸附过程的自发和吸热性质。Ti - Si - S纳米杂化材料用于MB染料吸附 - 脱附的六个重复循环。
