Preface to the Conference Proceedings We are delighted to present the proceedings of the 3rd International Conference on Nanoscience and Nanomaterials for Energy, Environment, and Biomedical Applications (iNEEBA-2023), which took place from October 1-2, 2023, in Salem, Tamilnadu, at Vinayaka Mission’s Kirupananda Variyar Arts and Science College, a constituent college of the Vinayaka Mission Research Foundation, in collaboration with Chulalongkorn University in Thailand and Gyeongsang National University (GNU) in South Korea. With an emphasis on the applications of Nanoscience and Nanotechnology in the fields of energy, environment, and biomedical applications, this conference brought together a diverse group of researchers, scientists, academicians, and industry professionals from all over the world to discuss and exchange ideas on the most recent developments in nanoscience and nanotechnology. The conference, which focused on encouraging collaboration and multidisciplinary methods, enabled fruitful discussions about the most recent developments, up-coming trends, and possible breakthroughs in the several fields it covered. We also extended our gratitude to all of the distinguished participants for their valuable contributions to the conference. Participants came from 8 different nations to present and share their work on a wide range of topics related to nanoscience and nanotechnology. We feel honoured to welcome our invited speakers, Prof. Dr. Myong Yong Choi, Director of Core-Facility Centre for Photochemistry and Nanomaterials, GNU, South Korea and Prof. Dr. Soorathep Kheawhom, Dept. of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand. We would also like to express our appreciation to the keynote speakers, session chairs, and all the participants who actively engaged in the vibrant discussions that took place during the conference. Your contributions have significantly enriched the overall experience and impact of the event. There were 420 registration and 250 abstracts were received from 8 different countries, 16 Indian states. They were categorized into 200 oral presentations and 50 poster presentations. This volume of proceedings contains a compilation of selected papers that were presented during the conference. The manuscripts are received through Morressier platform and the reviewers are appointed by the Morressier platform itself, which also serves as the channel through which papers are accepted. We have received 53 papers for IOP conference series: Journal of Physics and 25 papers were accepted after critical evaluation process. We extend our heartfelt gratitude to all the authors who submitted their work for consideration and to the members of the scientific committee for their rigorous review process. Their efforts have ensured the inclusion of outstanding research that aligns with the conference’s objectives. Special thanks to Vinayaka Mission’s Research Foundation, Deemed to be University, whose generous support played a crucial role in making this conference a success. As editors, we hope that this volume will serve as a valuable resource for researchers, academics, and practitioners, fostering further collaboration and inspiring future endeavours in our shared quest for knowledge and progress. Thus, the International Conference on Nanoscience and Nanomaterials for Energy, Environment, and Biomedical Applications proved to be a significant platform for knowledge exchange and collaboration in the rapidly evolving field of nanotechnology. The event provided valuable insights into the current state of research, emerging trends, and the potential impact of nanoscience on energy, environmental sustainability, and biomedical advancements. As the field continues to advance, the conference served as a catalyst for future breakthroughs and collaborations that will shape the path of nanotechnology applications in various domains. Thank you for your participation and contribution to the success of the iNEEBA 2023. List of Brief overview of the meeting, full list of committee names and affiliations and Profile of the Guest Editor are available in this Pdf.