Recent advances in chemically and biologically synthesized nanostructures for colorimetric detection of heavy metal

The ecological system is being threatened by the environmental risks related to soil and water pollution. The ecological integrity and environmental quality mandate the approaches and efforts to ensure safer monitoring of health system. A number of technologically advanced methodologies have been ameliorating the impact of toxic chemicals and heavy metals pollutants in the environment. In this regard, the colorimetric monitoring of heavy metal based analytes have extensively been investigated in a variety of fields including, environmental science biomedicine and food industry. Their wide range of applications owes from their ability to offer detection of these analytes with bare eye, high selectivity and sensitivity, facile synthesis and easy operating conditions. Herein, the recent advancement in the field of colorimetric detection based on chemically and biologically synthesized nanomaterials has been reviewed. Emerging biologically synthesized nanomaterials via eco-friendlier green routes and chemically synthesized nanomaterials offers a number of desirable features for the detection of target analyte.