Surfaces contaminated with SARS-CoV-2 or other such viruses pose a grave threat to the safety of individuals. Mobile robots mounted with ultraviolet (UV) light attachments are ideal for disinfecting hospital rooms, shopping centers and other public spaces. This paper mainly discusses the steps involved in making an autonomous UV Disinfectant robot and its functionalities. The UV Disinfectant robot initially maps the environment with the help of a user and subsequently localizes itself in the map and is able to autonomously navigate to a selected location in the map. The user must select waypoints in the generated map determining the locations where disinfection is required. After the waypoint generation of a map, the robot can autonomously navigate through the map disinfecting given locations. The robot is equipped with 6 UVC lights around a central column, which is fixed to a mobile robotic platform that has required sensors. The robot can be used as a part of the regular cleaning crew and it aids in reducing the spread of infectious diseases, viruses, bacteria, and other types of harmful microorganisms in the environment. ROS framework is used to program the robot.