The solvent-free mechano-chemical grinding of a bifunctional P25–graphene oxide adsorbent–photocatalyst and its configuration as porous beads,RSC Advances

当前位置： X-MOL 学术 › RSC Adv. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

The solvent-free mechano-chemical grinding of a bifunctional P25–graphene oxide adsorbent–photocatalyst and its configuration as porous beads
RSC Advances ( IF 3.9 ) Pub Date : 2022-08-01 , DOI: 10.1039/d2ra04017d
Fatima-Ezzahra Zirar _{1,

2} , Nadia Katir ₁ , Samir Qourzal ₂ , Ihya Ait Ichou ₂ , Abdelkrim El Kadib ₁

Affiliation

Owing to their use in water-cleaning technology, titanium-dioxide-based nanomaterials have dominated the photocatalysis scene, with so-called Degussa (P25) being the most promising under UV light. However, this is not the case under visible light, where it is necessary to combine titanium dioxide with other photosensitising nanomaterials. Unfortunately, most of the strategies aimed in this direction are chemically non-facile, energy-intensive, economically expensive, and not suitable for large-scale production. We herein describe a straightforward solvent-free approach for accessing visible-light-activated titanium-dioxide-based photocatalysts via the mechanochemical grinding of Degussa P25 with a second solid partner. Upon comparing several solid-material benchmarks, P25–graphene oxide is the best combination. The resulting material showed efficient performance for the adsorption and photodegradation of different dye pollutants, namely methylene blue, malachite green, Congo red, and methyl orange. The recorded performance was nearly comparable to that reached using sol–gel materials, with the ultimate advantage of being more sustainable and industrially scalable. The recyclability can be improved through a porous-bead configuration using biomass waste chitosan hydrogel, an approach that can further fulfill the requirement for more sustainable photocatalyst designs.

中文翻译：

双功能 P25-氧化石墨烯吸附剂-光催化剂的无溶剂机械化学研磨及其多孔珠结构

由于在水清洁技术中的应用，二氧化钛基纳米材料在光催化领域占据主导地位，所谓的 Degussa (P25) 在紫外光下最有前途。然而，在可见光下情况并非如此，需要将二氧化钛与其他光敏纳米材料结合起来。不幸的是，大多数针对这个方向的策略在化学上不方便、能源密集、经济昂贵，并且不适合大规模生产。我们在此描述了一种直接的无溶剂方法，用于通过以下途径获得可见光活化的二氧化钛基光催化剂Degussa P25 与第二个固体伙伴的机械化学研磨。在比较几个固体材料基准后，P25-氧化石墨烯是最佳组合。所得材料对不同染料污染物（即亚甲蓝、孔雀绿、刚果红和甲基橙）的吸附和光降解表现出有效的性能。记录的性能几乎与使用溶胶-凝胶材料达到的性能相当，最终优势是更具可持续性和工业可扩展性。通过使用生物质废料壳聚糖水凝胶的多孔珠结构可以提高可回收性，这种方法可以进一步满足对更可持续的光催化剂设计的要求。

更新日期：2022-08-01

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11