ORIENTAL JOURNAL OF CHEMISTRY www.orientjchem.org An International Open Access, Peer Reviewed Research Journal ISSN: 0970-020 X CODEN: OJCHEG 2021, Vol. 37, No.(5): Pg. 1030-1040 This is an Open Access article licensed under a Creative Commons license: Attribution 4.0 International (CC- BY). Published by Oriental Scientifc Publishing Company © 2018 Copper Nanoparticle(CuNP’s) Synthesis by the Various Ways with Photocatalytic and Antibacterial Activity (A-Review) ISRAFIL ALAM TITO 1 , Md SAHAb UddIN 2 , Md. SHAFIUL ISLAM 1 and SNAHASISH bHOWMIk 1 * 1 Department of Applied Chemistry and Chemical Engineering, Noakhali Science and Technology University, Noakhali, Bangladesh. 2 Hydrogen Energy Laboratory, Bangladesh Council of Scientifc and Industrial Research, Chittagong Laboratories, Bangladesh. *Corresponding author E-mail: sbhowmik.acce@nstu.edu.bd http://dx.doi.org/10.13005/ojc/370503 (Received: July 14, 2021; Accepted: October 06, 2021) AbSTRACT Over the last few decades, several studies have been undertaken to determine the benefts and drawbacks of various copper nanoparticle synthesis processes. Copper nanoparticles have gathered considerable attention because of their remarkable optical and electrical properties. CuNPs' optical, electrical and chemical characteristics are substantially depending on their synthesis procedures. Copper is less expensive than precious metals such as gold and silver, and it also possesses strong photocatalytic and antimicrobial competencies.In this review, synthesis of copper nanoparticles by various methods such as physical, chemical and biological is elaborately illustrated and in the meantime it's also explained how different reaction variables like temperature, pressure, reaction time, and reactor properties affect the size, shape, and surface area of produced copper nanoparticles. Moreover, photocatalysis and antibacterial mechanism for copper nanoparticles are also illustrated with proper illustration. keywords: Copper, Nanoparticles, Photocatalysis, Antibacterial Activities, Morphology. INTROdUCTION A material is said to be nanomaterial, when its size in the range of 1-100 nm(at least in one dimension). Nanomaterials has been used in various felds such as physics, chemistry, biology, nanomedicine, electronics, agriculture, textiles, pharmaceuticals, aerospace, construction, environmental sciences etc. because of the unique properties such as largesurface area to volume ratio, optical, mechanical, magnetic, electrical and properties etc 1 . Till date, various kinds of nanomaterials such as metallic and nonmetallic nanomaterial, core-shell nanomaterials,composites, organic nanomaterial,and metal oxide nanoparticles has been synthesized 2,3 . Among these nanomaterials, copper nanoparticles are considered as a potential material for different purposes such as catalyst, se