@article {48163, title = {Ru, Pd doped WO3 nanomaterials: a synergistic effect of noble metals to enhance the acetone response properties}, journal = {Ceramics International}, volume = {48}, year = {2022}, month = {JUN}, pages = {17923-17933}, type = {Article}, abstract = {

Noble metals (NMs) have an enormous impact on the intrinsic properties of the metal oxides. We report the synergistic effect of Ruthenium (Ru) and Palladium (Pd) noble metals on the enhancement of gas sensing properties of pure tungsten oxide (WO3). The gas sensing material is synthesized by simple and straight forward precipitation route, and its physico-chemical analyses are determined using XRD, FESEM, TEM/HRTEM, FFT, UV-Vis, XPS, EDAX, and BET measurements. Use of the developed material as a gas sensor is evaluated using several target gases (oxidizing as well as reducing), with acetone showing the best selectivity. The noble metal doping and hence catalytic action improved the gas response qualities. The synergistic effect of Ru and Pd on WO3 gas response properties are identified, where the effect is 99.80\% sensitivity, and lower response/recovery time (10 s and 2 min) at 300 degrees C operating temperature. Nonetheless, the sensors displayed better gas sensing properties even at lower operating temperatures ranging from 200 to 275 degrees C. In addition, the synergistic effect has displayed the dramatic enhancement in the sensitivity to 76.44\% at barely 10 ppm acetone concentration. This particular result will undoubtedly be helpful for diagnostic purpose of diabetic patients, and a strong candidate for prospective gas sensing applications, particularly acetone.

}, keywords = {Acetone vapours, Precipitation route, Ru -Pd doping, synergistic effect, WO3}, issn = {0272-8842}, doi = {10.1016/j.ceramint.2022.03.065}, author = {Kodam, Pavan M. and Ghadage, Pandurang A. and Nadargi, Digambar Y. and Shinde, K. P. and Mulla, Imtiaz S. and Park, J. S. and Suryavanshi, Sharad S.} } @article {48824, title = {Green synthesis of GO-loaded Ag/ZnO nanocomposites for methyl orange degradation}, journal = {Journal of Materials Science-Materials in Electronics}, volume = {34}, year = {2023}, month = {JUL}, pages = {1568}, type = {Article}, abstract = {

Nature is a perfect laboratory for creating novel nanomaterials for a variety of applications. A robust green synthesis approach to GO-loaded Ag/ZnO nanocomposite materials using medicinal plant extraction and their potential application in methyl orange dye degradation are reported. The straightforward technique employs zinc and silver nitrate precursors in an aqueous solution of medicinal plant extract, causing the precipitation process. Prior to photocatalytic investigations, the physico-chemical properties of the material are analysed using TG-DTA, XRD, FE-SEM, TEM, EDAX and BET. The developed material showcase hexagonal wurtzite structure of ZnO, with face-centered-cubic phase of Ag and AgCl. All the samples exhibit aggregated, irregular rounded grains, as expected in the precipitation synthesis process. Pristine ZnO showed 15.5\% degradation efficiency towards methyl orange, which was further improved by doping Ag from 0.5 to 2 mol\%. The catalyst with 1 mol\% Ag doping resulted in the better photocatalytic activity (26.30\%), which has again improved by loading the GO (27.46\%). The outcome of this study provides the new insights to GO-loaded Ag/ZnO nanocomposites by green synthesis route, in view of photocatalytic applications.

}, issn = {0957-4522}, doi = {10.1007/s10854-023-10979-6}, author = {Nadargi, Digambar Y. and Nadargi, Jyoti D. and Tamboli, Mohaseen S. and Tamboli, Asiya M. and Mulla, Imitaz S. and Umar, Ahmad and Truong, Nguyen Tam Nguyen and Suryavanshi, Sharad S.} } @article {49208, title = {La-Fe-O perovskite based gas sensors: recent advances and future challenges}, journal = {ACS OMEGA}, volume = {9}, year = {2024}, month = {JUL }, pages = {29994-30014}, type = {Review}, keywords = {ASSISTED SYNTHESIS, ETHANOL SENSING CHARACTERISTICS, LAFEO3 NANOPARTICLES}, issn = {2470-1343}, doi = {10.1021/acsomega.4c00334}, author = {Patil, Suraj S. and Babar, Bapuso M. and Nadargi, Digambar Y. and Shaikh, Faiyyaj I. and Nadargi, Jyoti D. and Sankapal, Babasaheb R. and Mulla, Imtiaz S. and Tamboli, Mohaseen S. and Truong, Nguyen Tam Nguyen and Suryavanshi, Sharad S.} } @article {49070, title = {Reduced graphene oxide/tungsten oxide (rGO/WO3): a versatile nanocomposite for enhanced detection of acetone}, journal = {Journal of Materials Science-Materials In Electronics}, volume = {35}, year = {2024}, month = {FEB}, pages = {264}, type = {Article}, abstract = {

In this study, we report a straightforward method for synthesizing semi-cubical nanostructures of tungsten trioxide (WO3) loaded with reduced graphene oxide (rGO) via a hydrothermal approach. Furthermore, the systematic investigations were made towards the improved gas sensing capabilities of these nanostructures for acetone. The use of semi-cubical rGO/WO3 nanostructures demonstrate the provision of efficient gas diffusion routes via a meticulously arranged mesoporous framework. Hence, it leads to a significant improvement in the sensing response towards acetone. The analysis of the sensing capabilities demonstrates that the response of the sensor is influenced by variations in operating temperature and gas concentration. It is seen that the inclusion of rGO not only enhances the sensing response but also gives quick response and recovery, which are measured to be 12 and 33 s, respectively. The WO3 sensor loaded with 0.1 wt\% rGO demonstrates a discerning reaction to acetone, exhibiting a high response of 93.60\% than that of the unmodified WO3 sensor (76.30\%). The gas sensing properties are explained through the role of rGO and the structural and morphological properties of the developed nanostructures.

}, issn = {0957-4522}, doi = {10.1007/s10854-023-11869-7}, author = {Patil, Abhijeet P. and Gaikwad, Mayur A. and Nadargi, Jyoti D. and Shaikh, Hamid and Alam, Mohammad Asif and Tamboli, Mohaseen S. and Kim, Jin Hyeok and Mulla, Imtiaz S. and Suryavanshi, Sharad S.} } @article {49950, title = {Dual-functional LaFeO3 perovskites via auto-combustion and hydrothermal methods for gas sensing and photocatalytic dye degradation}, journal = {Inorganic Chemistry Communications}, volume = {182}, year = {2025}, month = {DEC}, pages = {115493}, type = {Article}, abstract = {

Integrated environmental remediation is increasingly focused on the development of multifunctional materials capable of simultaneous detection of toxic gases and wastewater treatment. Present study aims to develop dual-functional LaFeO3 perovskites for gas sensing and photocatalytic dye degradation. The nanocrystalline powders of LaFeO3 were synthesized via two distinct methods; auto-combustion (A-LFO) and hydrothermal (H-LFO). Numerous characterization techniques (e.g. XRD, SEM, EDAX, BET, TEM, and XPS) were utilized in order to study the phase, morphology, surface area and elemental composition of A-LFO and H-LFO samples. Both samples were systematically evaluated for their potential in the gas sensing and photocatalytic degradation of malachite green (MG). In results, A-LFO exhibited superior performance in both applications, compared to the H-LFO. It shows similar to 90 \% sensitivity for the acetone (500 ppm) at the operating temperature of 275 degrees C and achieved similar to 78 \% degradation efficiency for malachite green (MG) dye (5 ppm) within 2 h irradiation of natural sunlight. Although, H-LFO presented comparatively lower performance, both materials demonstrated good selectivity, and stability highlighting their promise as a dual-functional environmental remediation agent. By exploring the performance of the synthesized materials in these dual applications, this research established a relationship between synthesis methods, material properties, and overall performance in environmental and industrial applications, by offering a sustainable and efficient solution to complex pollution challenges.

}, keywords = {Dye degradation, Gas sensing, LaFeO3, Malachite Green, Perovskites}, issn = {1387-7003}, doi = {10.1016/j.inoche.2025.115493}, author = {Patil, Suraj S. and Shinde, Kiran P. and Patil, Abhijeet P. and Abbas, Muhammad Aoun and Nadargi, Jyoti D. and Mujawar, Sarfraj H. and Mulla, Imtiaz S. and Kim, K. B. and Suryavanshi, Sharad S.} } @article {49939, title = {Surfactant-assisted tungsten oxide for enhanced acetone sensing and solar-driven photocatalysis: exploring the role of surfactants}, journal = {RSC Advances}, volume = {15}, year = {2025}, month = {AUG }, pages = {27895-27907}, type = {Article}, abstract = {

Surfactants play a pivotal role in the kinetics of nucleation and accretion of nanoparticles in such a way that they serve as a template for the development of nanostructures, consequently influencing the morphology, dimensions, and other surface properties. Herein, we report the influence of cationic and anionic surfactants (CTAB, SDS, PVP and HMT) on the development of pristine WO3 nanostructures and their impact on gas sensing and photocatalytic properties of WO3. The various surfactant-assisted WO3 nanostructures were synthesized via a straightforward hydrothermal route and systematically analyzed using XRD, FESEM-EDAX, TEM/HRTEM, XPS, UV-Vis, and BET measurements. Gas sensing properties of various oxidizing and reducing gases revealed superior selectivity towards acetone. Among the various surfactant-assisted WO3, CTAB/WO3 exhibited an excellent response of 84.84\% towards 100 ppm acetone at an optimal operating temperature of 300 degrees C. The CTAB/WO3 sensor exhibited a linear response to acetone at lower concentrations, showing a 4.8\% response at 0.8 ppm, which delineates the threshold between healthy and diabetic breath acetone levels. At 1.8 ppm, the sensor recorded 8.1\% response, aligning with diabetes values reported by National Institute for Occupational Safety and Health (NIOSH). Moreover, photocatalytic performance evaluations demonstrated a methylene blue degradation efficiency of 47.19\% under natural solar irradiation. This work will motivate researchers in developing high performance acetone gas sensors and photocatalytic dye-degradation by the integration of appropriate surfactants in WO3 nanostructures.

}, doi = {10.1039/d5ra02593a}, author = {Patil, Abhijeet P. and Patil, Suraj S. and Tamboli, Mohaseen S. and Damkale, Shubhangi R. and Nadargi, Digambar Y. and Nadargi, Jyoti D. and Mulla, Imtiaz S. and Suryavanshi, Sharad S.} }