A sustainable method toward melamine-based conjugated polymer semiconductors for efficient photocatalytic hydrogen production under visible light,Green Chemistry

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A sustainable method toward melamine-based conjugated polymer semiconductors for efficient photocatalytic hydrogen production under visible light
Green Chemistry ( IF 9.3 ) Pub Date : 2017-12-04 00:00:00 , DOI: 10.1039/c7gc02231j
Xiubing Huang _{1,

2,

3,

4,

5} , Zhenyu Wu _{1,

2,

3,

4,

5} , Haiyan Zheng _{1,

2,

3,

4,

5} , Wenjun Dong _{1,

2,

3,

4,

5} , Ge Wang _{1,

2,

3,

4,

5}

Affiliation

The search for conjugated polymer photocatalysts for H₂ production under visible light remains a key challenge. Reported herein is a conjugated polymer (i.e., melamine-terephthalaldehyde polymer (PMTPA)) derived from melamine and terephthalaldehyde precursors without an external solvent through a Schiff-base reaction. By adjusting the polymerization temperature, PMTPA with different sample colors and band gaps was obtained, which was further applied as a photocatalyst to investigate its activity in H₂ evolution. A photocatalytic H₂ evolution efficiency up to 58.1 μmol h⁻¹ was observed over PMTPA polymerized at 250 °C under visible light (λ > 420 nm), which was about two times as high as that of C₃N₄. The Schiff-base reaction without external solvent conditions provides a facile strategy for the synthesis of conjugated polymeric semiconductors with better molecular engineering for advanced applications in the fields of catalysis, energy, and environmental remediation.

中文翻译：

一种以三聚氰胺为基础的共轭聚合物半导体的可持续方法，可在可见光下有效地光催化制氢

寻找在可见光下产生H _2的共轭聚合物光催化剂仍然是关键的挑战。本文报道的是在没有外部溶剂的情况下通过席夫碱反应衍生自三聚氰胺和对苯二甲醛前体的共轭聚合物（即，三聚氰胺-对苯甲醛聚合物（PMTPA））。通过调节聚合温度，获得了具有不同样品颜色和带隙的PMTPA，并将其进一步用作光催化剂以研究其在H ₂析出中的活性。在可见光下，在250°C聚合的PMTPA上，观察到高达58.1μmolh ^-1的光催化H ₂放出效率（λ> 420 nm），大约是C ₃ N _4的两倍。没有外部溶剂条件的席夫碱反应为合成共轭聚合物半导体提供了一种简便的策略，具有更好的分子工程技术，可用于催化，能源和环境修复领域的高级应用。

更新日期：2018-02-06

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