Our ever-growing demand for freshwater has caused its sources to diminish rapidly and scientists have been attempting to find strategies to purify wastewater for reuse to meet future demands. At present, the most common wastewater treatment techniques involve the use of chemicals or ultraviolet radiation to kill microorganisms or remove pollutants. But these conventional techniques have several drawbacks, such as the toxic effects of chemical substances on our health or the high energy requirements to run treatment facilities. To create a sustainable system of wastewater treatment, the focus has shifted to eco-friendly and cost-effective technologies.