Carbon Dots in Humidity Sensing, pH Sensing, and Nitro Explosives Detection

Abstract

Detection of environmental pollutants—such as heavy metals, hazardous gases, and other contaminants in soil, air, water, and food items—is a necessary step in terms of environmental safety and good health care. Several sensors are being employed to achieve a clean and healthy environment. Among diĎerent used sensors, the synthesis of carbon dots (CDs) using diĎerent chemical and green synthesis routes has achieved aĨention because of their small size and quantum conėnement eĎect. ĉey show unique potential including exceptional biocompatibility along with low cytotoxic activity and unresponsiveness toward targeting chemicals. ĉe lowest limit of detection and faster response of CDs has molded them to be used in the form of photoluminescence, electrochemilumin- escence, humidity sensing, pH sensing, and nitro explosives detection of gases. ĉis chapter describes diĎerent modes of CDs for the detection of humidity, pH sensing,and nitro explosives along with their limit of detection and reusability.ĉe obstacles and breakthroughs in the utilization of CDs have also been highlighted. ĉe detection of environmental pollutants using CDs has been found to be a beĨer approach to replacing the existing Ěuorescent nanomaterials to generate a pollution-free environment.