PreparationAll of the reagents were analytical grade and used with-out further purification. NaTaO3nanocubes were synthesized bythe reported hydrothermal method [21]. Typically, the NaTaO3nanocubes and 25 mL distilled water were added in a 50 mL beakerand vigorous stirring at room temperature. Then a certain amountof AgNO3aqueous solution was added in the beaker and finallyadded excessive amounts of HCl aqueous solution under magneticstirring for 2 h. The AgCl NPs were synthesized and deposited onthe surface of the NaTaO3nanocubes. The as-prepared photocat-alysts were irradiated under a 300 W xenon lamp for 20 min sothat the partial Ag+ions from AgCl were reduced to Ag◦species.The resulting photocatalysts were washed by distilled water andethanol same times until the pH 7.0 and the final products weredried at 60◦C for 24 h. For comparison, Ag/AgCl photocatalysts wereprepared by excessive amounts of HCl aqueous solution added tothe AgNO3aqueous solution.