Catalytic technologies for lowering emissions of environmentally unacceptable compounds are referred to as environmental catalysis. The traditional area of environmental catalysis (mostly NOx removal from stationary and mobile sources, as well as VOC conversion) has seen considerable expansion in the previous decade. The rapid growth of environmental catalysis in recent years has been fueled by the ever-increasing levels of pollutants in the environment. Environmental catalysis is a multidisciplinary research subject to which an increasing number of chemists, materials scientists, and environmentalists have dedicated their attention due to its promising potential for enhancing human health and quality of life.