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Vempuluru Navakoteswara Rao

Catalysis 2022
Vempuluru Navakoteswara Rao, Speaker at Chemical Engineering Conferences
National Nanofab Center, Korea, Republic of
Title : 1D/0D Heterojunction nanohybrids extremely excitons transfer for superior photocatalytic hydrogen evolution and NO2 gas detection at ambient temperature


Photocatalytic hydrogen generation and room temperature gas sensors are promising to minimize environmental pollution and carbon-based gas emissions [1]. In this work, TiO2 nanoparticles grown onto CdS nanorods were designed via two-stage facile synthesis to obtain 1D/0D unique heterostructures. Subsequently, titanate nanoparticles loading onto CdS surfaces, with an optimized titanate concentration (20 mM) showed noteworthy superior photocatalytic hydrogen generation (21.4 mmol/ h/gcat) under 1.5G air mass solar light irradiation. The recyclability of the optimized nanohybrid for six cycles, each cycle has 4 h, indicating that the prepared hetero-structured photocatalyst is an excellent stable material for a prolonged lifetime energy application. In addition, the optimized active CRT-2 was used for an effective room temperature NO2 gas detection. The CRT-2 sensor showed a higher response (69.16 %) towards NO2 gas (100 ppm) at room temperature (RT) with the lowest detection limit of ~118 ppb when compared to its pristine counterparts. The CRT-2 sensor showed a short response/recovery time, good cycling stability, and excellent selectivity to NO2 gas at RT. The NO2 gas sensing performance of CRT-2 sensor was further boosted using the UV light (365 nm) activation energy. As expected, under the UV light, the sensor exhibited a remarkable gas sensing response with a fast response/recovery and a significant selectivity towards NO2 gas. Furthermore, a long-term stability test under dark and UV light towards 100 ppm of NO2 gas was performed at RT and the results showed a significant response continuously for up to 6 weeks without any major loss in the sensor response, signifying that the developed sensor is more reliable for stable gas sensing applications. Thus, excellent photocatalytic and gas sensing performances of CRT-2 material can be ascribed to its high surface area, morphology, synergistic effect, enhanced charge generation, and separation. The constructive 1D/0D CdS@TiO2 heterojunction material is highly efficient for multi-applications such as energy generation, environmental monitoring, and safety at RT.

Keywords: Photocatalyst, heterostructures, hydrogen, sensors, stability, and environmental pollution.

Audience take-away:

  • By presentation, the audience will learn how to synthesize monodispersed nanospheres followed by facile methods (Review any current data and analytics, look to previous successes among your audience, and Create buyer personas, comments, and engagements. Experiment with content and updates to your products and services.)
  • Yes, it is research peoples have very useful for expanding their research, especially energy application
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  • Our designing morphology is a new ideal strategy for enhancing the suppression of photo corrosion, as well as superior photocatalytic overall water splitting as well as toxic gas detection application. 


Dr. V. Navakoteswara Rao was awarded a Bachelor of Science (Maths, Physics, and Chemistry) in April 2011 from Sri Venkateshwara Arts College, Tirupati affiliated with Sri Venkateshwara University, Tirupati. He has obtained a Master of Science in the Department of Chemistry in April 2014 from Sri Venkateshwara University, Tirupati. Further, He has received a Bachelor of Education in Physical Science and Mathematics Methodology in November 2015 from Sri Krishna Devaraya University. He qualified Council of Scientific Industrial Research (CSIR-UGCNET) All India Rank 43rd rank in chemical sciences 2014 and Graduate Aptitude Test in Engineering (GATE-2018) with a GATE score is 340. He was selected and MNRE: YVU-CECRI Project worked as a Junior Research Fellow as well as enrolled Ph.D. on “Hierarchical Composite Nanostructure Photocatalyst For Water Splitting Under Solar Light Irradiation” under the supervision of Prof. M.V. Shankar in Nanocatalysis and Solar Fuels Research laboratory during March 2016 to April 2018 as a Junior Research Fellow. Later he was upgraded from Junior Research Fellow to Senior Research Fellow (May 2018 to March 2019). To continue doctoral research V. Navakoteswara Rao was awarded Senior Research Fellowship by the Council of Scientific Industrial Research (CSIR-SRF) Pusa; New Delhi, India. In order to, he has selected prestigious followership which is the Brain pool program-2021 working as a senior scientist at the Korea Advanced Institute of Science & Technology (KAIST), Daejeon, Republic of Korea.  He has authored 40 publications, 1 book (Monograph), 2 book chapters, and presented papers in 27 international and national conferences he won two best poster presentation awards in National/International conferences and a cumulative Impact factor is 315.5 with H-Index 19, I-10 Index-25, and Cite score is 1255 (Various journals Had been cited).