College of Food Science, South China Agricultural University, Guangzhou 510642, China.
College of Food Science, South China Agricultural University, Guangzhou 510642, China.
Food Chem. 2023 Feb 1;401:134082. doi: 10.1016/j.foodchem.2022.134082. Epub 2022 Sep 5.
N-doped TiO-BiWO (NTB) three-component photocatalyst was prepared using a glycol solvothermal method. The photocatalysts and films were characterized, and applied to the degradation of tetracycline (TC) in milk and its effect on the quality of milk. The results show that the NTB photocatalyst exhibits good photocatalytic activity under visible light, and its TC degradation rate is increased by 1.76, 1.49, 1.42, 1.16, and 1.13 times higher than that of TiO, BiWO, N-TiO, N-BiWO and TiO-BiWO, respectively. Due to the N doping, the photogenerated electron-hole pair recombination rate of photocatalyst is greatly reduced, which improving its photocatalytic performance. Additionally, the absorption wavelength threshold is enlarged by 459 nm, the gap width is reduced to 2.69 eV, and the degradation rate of TC is still 83.24 % after 5 repetitions. HPLC-MS revealed the active species, intermediates and photodegradation pathways in the photocatalytic process.
采用乙二醇溶剂热法制备了 N 掺杂 TiO-BiWO（NTB）三元光催化剂。对光催化剂和薄膜进行了表征，并将其应用于牛奶中四环素（TC）的降解及其对牛奶质量的影响。结果表明，NTB 光催化剂在可见光下具有良好的光催化活性，其 TC 降解率分别比 TiO、BiWO、N-TiO、N-BiWO 和 TiO-BiWO 提高了 1.76、1.49、1.42、1.16 和 1.13 倍。由于 N 掺杂，光催化剂的光生载流子复合率大大降低，从而提高了其光催化性能。此外，吸收波长阈值增大了 459nm，带隙宽度减小至 2.69eV，经过 5 次重复后，TC 的降解率仍为 83.24%。HPLC-MS 揭示了光催化过程中的活性物质、中间产物和光降解途径。
