Vijay K. Tomer2 Jasbir Sangwan1 Vijay Kiran3 Ekta Poonia4

2, Berkeley Sensor and Actuator Center, University of California, Berkeley, Berkeley, California, United States
1, Department of Higher Education, Government of Haryana, Tau Devi Lal Govt. College for Women, Sonipat, , India
3, Chemistry, CRA College, Sonipat, , India
4, Chemistry, D.C.R. University of Science and Technology, Sonipat, , India

The template assisted facile synthesis of 3-D cubic mesoporous silica comprised with in situ doping of metal oxides, immense surface to volume ratio, ordered network of long range porosity and ultrafine size was proposed in this study. The FE-SEM and HR-TEM studies indicated the novel morphology of hexagonal cubic channels with ordered network of porosity. X-ray diffraction study confirmed the 3D-cubic structure of silica with existence of anatase phase of in situ doped metal oxide species containing Im3m symmetry. N2-BET adsorption desorption isotherm displayed the immense surface area (768m2/g) of synthesized material which was decreased (715m2/g) after in situ doping of metal oxides due to decrease in mesoporous volumes. The sensing behavior of synthesized nanostructures was determined by measuring the change in impedance corresponding to different RH conditions. The in situ doped metal oxide silica samples specified a swift response time of 4.7 s and quick recovery time of 3.2 s exhibiting synergistic effect as compared to undoped silica. In addition, the long term stability, sensitivity, great recyclability and less hysteresis indicated the possible practical application of synthesized nanoparticles.