A new accessible sonochemical assembly method is developed for the preparation of photoluminescent oil-filled [email protected]/Cu₂O/CuO–graphene oxide (GO) microspheres that emit light of green, yellow, and red colors. This method is based on the ultrasonic emulsification of a biphasic mixture consisting of CuS/Cu₂O/CuO–graphene oxide (GO) nanocomposites with poly(vinyl alcohol) (PVA) (aqueous phase) and tetraethyl orthosilicate with sunflower oil (organic phase). CuS/Cu₂O/CuO–GO nanocomposites are composed of sonochemically formed three phases of copper: covellite CuS (p-type semiconductor), cuprite Cu₂O (Bloch p-type semiconductor), and CuO (charge-transfer insulator). The photoluminescence properties of microspheres result from H-bridging between PVA and CuS/Cu₂O/CuO–GO nanostructures, light absorption ability of Cu₂O, and charge-transfer insulation by CuO. Substitution of PVA by S-containing methylene blue quenches fluorescence by enhanced dye adsorption on CuS/Cu₂O/CuO–GO because of CuS and induced charge transfer. Non-S-containing malachite green is in a nonionized form and tends to be in the oil phase, prohibiting the charge transfer on CuS/Cu₂O/CuO–GO.

中文翻译：

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声化学组装的光致发光铜改性氧化石墨烯微球

开发了一种新的可利用的声化学组装方法，用于制备光致发光油填充的[受电子邮件保护的] / Cu ₂ O / CuO-氧化石墨烯（GO）微球，它们发出绿色，黄色和红色的光。该方法基于超声乳化由CuS / Cu ₂ O / CuO-氧化石墨烯（GO）纳米复合材料与聚乙烯醇（PVA）（水相）和原硅酸四乙酯与葵花籽油（有机相）组成的双相混合物的超声乳化。）。CuS / Cu ₂ O / CuO–GO纳米复合材料由声化学形成的三相铜构成：铜镍铁矿CuS（p型半导体），铜铁矿Cu ₂O（Bloch p型半导体）和CuO（电荷转移绝缘体）。微球的光致发光特性从PVA和硫化铜/铜之间H-桥接导致₂ O / CuO的-GO的纳米结构中，Cu的光吸收能力₂ O，和的CuO电荷转移绝缘。由于CuS和诱导的电荷转移，含S的亚甲蓝取代PVA可以通过增强染料在CuS / Cu ₂ O / CuO-GO上的吸附来猝灭荧光。不含S的孔雀石绿为非离子形式，并且倾向于呈油相，从而阻止了电荷在CuS / Cu ₂ O / CuO-GO上的转移。