“…[1][2][3][4][5] Among numerous heavy metal pollutants, hexavalent chromium (Cr(VI)) in wastewater from wood preservation, dye production, textile, electroplating, petroleum refining and leather process industries has high carcinogenicity, mutagenicity and teratogenicity, and has gained global attention due to its great harm to the environment and human health. [6][7][8][9][10][11] At present, a common treatment method of Cr(VI) in wastewater is to convert toxic Cr(VI) to less toxic trivalent chromium Cr(III) by means of a variety of techniques including ion exchange, 12 chemical precipitation, 13 membrane separation, 14 biodegradation 15 and photocatalytic technology. 16 Thereinto, photocatalysis with the merits of environmental friendliness, low toxicity and directly using solar energy has become a preferable and cost-effective route for the treatment of Cr(VI) in wastewater.…”