In this work, a high-surface-area dual inorganic molecularly imprinted (DIMI) Bi₂WO₆/CuO/Ag₂O photocatalyst was developed for the selective photocatalytic degradation of methyl green (MG) and auramine O (AO) dyes as target pollutants. The DIMI-Bi₂WO₆/CuO/Ag₂O heterojunction was synthesized by a sonochemically assisted sol–gel method by coating a layer of molecularly imprinted Ag₂O/CuO on the surface of Bi₂WO₆ nanocubes with MG and AO as the templates. This was followed by calcination for the removal of target molecules and annealing for Ag/Cu oxide preparation. This novel photocatalyst was prepared to overcome the challenge of the co-existing non-target molecules, which has limited the photocatalytic degradation performance. The surface DIMI sites could act as surface defects for accelerating the separation of photogenerated holes and electrons, which led to the increased generation of OH radicals. Moreover, the DIMI sites had increased binding affinity toward MG and AO via the formation of multiple H bonds and electrostatic bonds, which were confirmed by FTIR spectroscopy, PL and EIS studies. The surface DIMI sites led to the increased adsorption and improved local concentration of MG and AO on Bi₂WO₆/CuO/Ag₂O. Consequently, the heterojunction properties of the final DIMI product accelerated the transfer and separation of photogenerated carriers. The high binding affinity of the DIMI sites to MG and AO confirmed the selective recognition, which was tested in the presence of coexisting pollutant dyes. The other characterizations confirmed the successful fabrication and high photocatalytic activity of the high-surface-area DIMI-Bi₂WO₆/CuO/Ag₂O heterostructured composite. In general, the superior interfacial electronic interactions, high migration efficiency of photoinduced charge carriers, and strong visible light absorption of the prepared photocatalyst resulted in good photocatalytic performance.

中文翻译：

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双表面无机分子印迹Bi2WO6-CuO / Ag2O异质结构，对目标污染物的光催化降解具有增强的活性选择性。

在这项工作中，开发了一种高表面积的双重无机分子印迹（DIMI）Bi ₂ WO ₆ / CuO / Ag ₂ O光催化剂，用于选择性光催化降解甲基绿（MG）和金胺O（AO）染料污染物。DIMI-Bi ₂ WO ₆ / CuO / Ag ₂ O异质结是通过声化学辅助溶胶-凝胶法在Bi ₂ WO ₆的表面涂覆一层分子印迹的Ag ₂ O / CuO合成的。以MG和AO为模板的纳米立方体。随后进行煅烧以除去目标分子，并进行退火以制备Ag / Cu氧化物。制备这种新型光催化剂以克服共存的非靶分子的挑战，该挑战限制了光催化降解性能。表面DIMI位点可充当表面缺陷，以加速光生空穴和电子的分离，从而导致OH自由基的产生增加。此外，DIMI位点通过形成多个H键和静电键增加了与MG和AO的结合亲和力，这已通过FTIR光谱，PL和EIS研究得到证实。表面DIMI位点导致Bi ₂上MG和AO的吸附增加并提高了局部浓度WO ₆ /的CuO /银₂ O.因此，最终产品DIMI的异质结特性加速光生载流子的转移和分离。DIMI位点对MG和AO的高结合亲和力证实了选择性识别，在存在共存的污染物染料的情况下进行了测试。其他特征证实了高表面积DIMI-Bi ₂ WO ₆ / CuO / Ag ₂ O异质结构复合材料的成功制备和高光催化活性。通常，所制备的光催化剂具有优异的界面电子相互作用，光诱导的电荷载体的高迁移效率以及强烈的可见光吸收，从而导致良好的光催化性能。