Rational design of a hollow multilayer heterogeneous organic framework for photochemical applications,Materials Chemistry Frontiers

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Rational design of a hollow multilayer heterogeneous organic framework for photochemical applications
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-06-22 , DOI: 10.1039/d0qm00286k
Haihui Wang _{1,

2,

3,

4,

5} , Xiaohui Zhu _{1,

2,

3,

4,

5} , Yuling Yang _{1,

2,

3,

4,

5} , Chengyun Chen _{1,

2,

3,

4,

5} , Qianying Lin _{1,

2,

3,

4,

5} , Yu He _{1,

2,

3,

4,

5} , Xiaofei Yin _{5,

6,

7,

8} , Chunhua Lu _{1,

2,

3,

4,

5} , Huanghao Yang _{1,

2,

3,

4,

5}

Affiliation

The self-assembly of hollow organic frameworks has been a focal point in nanotechnology for several decades. Herein, we emphasized a general and simple system to fabricate an arbitrary type of hollow multilayer heterogeneous organic framework. The hollow organic framework nanospheres comprising black phosphorus quantum dots (BPQD), carbon nitride, and polydopamine (PDA) (PDA@g-C₃N₄/BPQD) are fabricated using an electrostatic bonding method. Surprisingly, the self-assembly process of PDA@g-C₃N₄ is not completely in accordance with the law of charge interactions, only positively charged g-C₃N₄ and negatively charged PDA can self-assemble to obtain the desired structure. Furthermore, BPQD was further loaded onto the surface of PDA@g-C₃N₄ to increase light utilization and strengthen the charge separation in the photochemical process. Benefiting from the hierarchical structure and the hollow spherical morphology, the PDA@g-C₃N₄/BPQD shows a significant photocatalytic H₂ production activity and the ability to generate reactive oxygen species (ROS) upon triggering with near infrared (NIR) light. This method provides a proof-of-concept of an organic framework with a precisely controlled morphology.

中文翻译：

用于光化学应用的中空多层异质有机骨架的合理设计

数十年来，空心有机骨架的自组装一直是纳米技术的重点。在这里，我们强调了一种通用而简单的系统来制造任意类型的空心多层异质有机骨架。使用静电键合方法制备了包含黑磷量子点（BPQD），氮化碳和聚多巴胺（PDA）（PDA @ gC ₃ N ₄ / BPQD）的中空有机骨架纳米球。令人惊讶的是，PDA @ gC ₃ N ₄的自组装过程并不完全符合电荷相互作用定律，而仅是带正电荷的gC ₃ N ₄带负电荷的PDA可以自组装以获得所需的结构。此外，将BPQD进一步加载到PDA @ gC ₃ N ₄的表面上，以提高光利用率并加强光化学过程中的电荷分离。得益于分层结构和中空球形形态，PDA @ gC ₃ N ₄ / BPQD显示出显着的光催化H ₂产生活性，并具有在被近红外（NIR）光触发时产生活性氧物种（ROS）的能力。此方法提供了具有精确控制的形态的有机框架的概念验证。

更新日期：2020-08-27

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