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Confined-Synthesis of Ceria in Tubular Nanoclays for UV Protection and Anti-Biofilm Application
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-10-31 , DOI: 10.1002/adfm.202307157 Yue Feng 1 , Di Zhang 1 , Xiangyu Chen 1 , Changren Zhou 1 , Mingxian Liu 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-10-31 , DOI: 10.1002/adfm.202307157 Yue Feng 1 , Di Zhang 1 , Xiangyu Chen 1 , Changren Zhou 1 , Mingxian Liu 1
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UV radiation is the main cause of skin aging and cancers. Commercial sunscreens suffer from low efficacy and poor safety, while ceria nanocrystals are promising inorganic UV filters. Herein, the lumen of natural halloysite clay nanotubes (HNTs) is employed for the confined growth of ceria nanocrystals, which can effectively tailor the particle size, morphology, distribution, and oxygen vacancies of the ceria. The ceria in HNTs lumen exhibits increased UV protection and catalytic activity, while the outer surfaces of HNTs can be retained for additional modification. Ceria-loaded HNTs (named CeOx@HNTs) can act as oil–water interfacial stabilizers to develop skin-friendly Pickering emulsion sunscreens. Attributed to the Pickering emulsion interfacial catalytic effect of CeOx@HNTs, the UV absorption performance of the sunscreens is enhanced by 3.1 times after emulsification, achieving a sun protection factor of 58.5. In vitro and in vivo studies confirm the effectiveness of the prepared sunscreen in mitigating DNA damage, apoptosis, and malignant transformation. In addition, the sunscreen inhibits biofilm formation by disturbing membrane homeostasis through oxidative stress. This work develops a confined-growth method of rare earth oxides within tubular nanoclays, which shows promising applications in many fields, such as aging resistance, photoluminescence, and chemical catalysis.
中文翻译：
管状纳米粘土中二氧化铈的受限合成用于紫外线防护和抗生物膜应用
紫外线辐射是皮肤老化和癌症的主要原因。商业防晒霜功效低且安全性差，而二氧化铈纳米晶体是很有前途的无机紫外线过滤剂。在此，利用天然埃洛石粘土纳米管（HNT）的内腔来限制二氧化铈纳米晶体的生长，可以有效地调节二氧化铈的粒径、形貌、分布和氧空位。 HNT 内腔中的二氧化铈表现出增强的紫外线防护和催化活性，而 HNT 的外表面可以保留以进行额外的修饰。负载二氧化铈的 HNT（命名为 CeO x @HNTs）可以作为油水界面稳定剂来开发亲肤的 Pickering 乳液防晒霜。由于CeO x @HNTs的Pickering乳液界面催化作用，乳化后防晒霜的紫外线吸收性能增强3.1倍，防晒系数达到58.5。体外和体内研究证实了所制备的防晒霜在减轻 DNA 损伤、细胞凋亡和恶性转化方面的有效性。此外，防晒霜通过氧化应激扰乱膜稳态来抑制生物膜形成。这项工作开发了一种管状纳米粘土内稀土氧化物的限域生长方法，该方法在许多领域显示出有前景的应用，例如抗老化、光致发光和化学催化。
更新日期：2023-10-31
中文翻译：
管状纳米粘土中二氧化铈的受限合成用于紫外线防护和抗生物膜应用
紫外线辐射是皮肤老化和癌症的主要原因。商业防晒霜功效低且安全性差，而二氧化铈纳米晶体是很有前途的无机紫外线过滤剂。在此，利用天然埃洛石粘土纳米管（HNT）的内腔来限制二氧化铈纳米晶体的生长，可以有效地调节二氧化铈的粒径、形貌、分布和氧空位。 HNT 内腔中的二氧化铈表现出增强的紫外线防护和催化活性，而 HNT 的外表面可以保留以进行额外的修饰。负载二氧化铈的 HNT（命名为 CeO x @HNTs）可以作为油水界面稳定剂来开发亲肤的 Pickering 乳液防晒霜。由于CeO x @HNTs的Pickering乳液界面催化作用，乳化后防晒霜的紫外线吸收性能增强3.1倍，防晒系数达到58.5。体外和体内研究证实了所制备的防晒霜在减轻 DNA 损伤、细胞凋亡和恶性转化方面的有效性。此外，防晒霜通过氧化应激扰乱膜稳态来抑制生物膜形成。这项工作开发了一种管状纳米粘土内稀土氧化物的限域生长方法，该方法在许多领域显示出有前景的应用，例如抗老化、光致发光和化学催化。
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