| Summary: | The evolution of industrialization has been marked by an increase in the utilization of chemically derived new products. Water bodies like sea, rivers and lakes are frequently contaminated by industrial wastewater which discarded toxic pollutants such as dyes and heavy metals that possess carcinogenic mutagenic properties. Photocatalytic degradation has received much greater attention in the decomposition of water pollutants that cause various health problems and environmental pollution. The bare and modified SnO2 has great importance due to its remarkable catalytic and distinctive physicochemical properties. It is a chemically stable, inexpensive and non-toxic material. Various structural modifications were done by using metal/nonmetal doping and composites synthesis. The synergetic effect of SnO2 coupling with other semiconductor materials extends the optical response in the visible region, increases charge separation and suppresses e−/h+ pair recombination, allowing solar energy to be utilized more efficiently and boosting the photocatalytic performance. In this review article, we addressed the past five year's researches on the development of visible light-responsive SnO2-based photocatalysts, which were synthesized via the hydrothermal/solvothermal method. The utilization of modified SnO2 for dye degradation, Cr(VI) reduction, pharmaceutical antibiotics and other pollutants decontamination is thoroughly reviewed along the reusability of SnO2 heterostructure has been discussed.
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