Water pollution is one of the problems that must be solved quickly. Synthetic dyes are known as one of the main organic contaminant groups in water that have a bad effect on human and aquatic life. Herein, Starch/Zeolitic imidazolate framework (ZIF-67)/Graphene oxide biocomposites (SZ67GO) were synthesized with various starch values (0.5, 1 and 1.5 g denoted as SZ67GO-0.5, SZ67GO-1 and SZ67GO-1.5, respectively). The synthesized materials were characterized and used for the degradation of Acid Blue 92 (AB92) in the presence of LED visible light. The effect of catalyst dosage, contaminant concentration, and pH on AB92 degradation was studied. The AB92 removal using visible light was 4% for Starch, 24% for GO, 40% for ZIF-67, and 75–86.4 % for Starch/ZIF-67/GO composites. SZ67GO-1 biocomposite showed the highest degradation ability. The AB92 degradation efficiency using 0, 2, 4, 6, and 8 mg of SZ67GO-1 biocomposite are 1, 20, 52, 67.3, and 86.4%, respectively. The kinetics of decolorization by SZ67GO-1 biocomposite followed the zero-order. The reusability of SZ67GO-1 biocomposite for 3 cycles of AB92 degradation was above 82% (cycle 1: 86.4%, cycle 2: 84%, and cycle 3: 82%)

中文翻译：

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新型淀粉/沸石咪唑酯骨架（ZIF-67）/氧化石墨烯生物复合材料的合成及其光催化染料降解能力

水污染是必须迅速解决的问题之一。合成染料被认为是水中主要的有机污染物组之一，对人类和水生生物产生不良影响。在此，合成了具有不同淀粉含量的淀粉/沸石咪唑酯骨架（ZIF-67）/氧化石墨烯生物复合材料（SZ67GO）（0.5、1和1.5 g分别表示为SZ67GO-0.5、SZ67GO-1和SZ67GO-1.5）。对合成材料进行了表征并用于在 LED 可见光存在下降解酸性蓝 92 (AB92)。研究了催化剂用量、污染物浓度和 pH 对 AB92 降解的影响。使用可见光的 AB92 去除率对于淀粉为 4%，对于 GO 为 24%，对于 ZIF-67 为 40%，对于淀粉/ZIF-67/GO 复合材料为 75–86.4%。 SZ67GO-1生物复合材料表现出最高的降解能力。使用 0、2、4、6 和 8 mg 的 SZ67GO-1 生物复合材料的 AB92 降解效率分别为 1、20、52、67.3 和 86.4%。 SZ67GO-1生物复合材料的脱色动力学遵循零级动力学。 SZ67GO-1生物复合材料的AB92降解3个循环的可重复使用性高于82%（循环1：86.4%，循环2：84%，循环3：82%）