Rapid Synthesis of Zeolitic Imidazole Frameworks in Laser‐Induced Graphene Microreactors,ChemSusChem

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Rapid Synthesis of Zeolitic Imidazole Frameworks in Laser‐Induced Graphene Microreactors
ChemSusChem ( IF 7.5 ) Pub Date : 2019-01-22 , DOI: 10.1002/cssc.201802446
Yunchao Xie ₁ , Chi Zhang ₁ , Jheng-Wun Su ₁ , Heng Deng ₁ , Cheng Zhang ₁ , Jian Lin ₁

Affiliation

Various approaches to synthesize zeolitic imidazole frameworks (ZIFs) have been developed, such as solvothermal, sonochemical, microfluidic, and mechanochemical reactions. However, most of them are time consuming and involve complex processing steps, thus they cannot rapidly screen potential candidates to obtain ZIFs on demand. Such a challenge calls for efficient synthetic approaches. Herein, this challenge is overcome by employing two nonconventional heating strategies, that is, microwave and Joule heating, which are induced by laser‐induced graphene (LIG) microreactors, to rapidly synthesize ZIFs. In the first reaction, the LIG acts as a susceptor that absorbs electromagnetic energy, which is converted into heat. In the latter one, LIG acts an electrical conductor that converts electrical energy to heat. Both of them can rapidly heat up the reactor, accelerating the crystal growth for synthesizing ZIFs with well‐controlled morphology and crystallinity. To demonstrate a conceptual application, a ZIF‐67/LIG composite was converted into Co/CoNC/LIG by a CO₂ laser‐induced process. It showed excellent performance in the oxygen reduction reaction with a half‐wave potential (E_1/2) of 0.798 V, and superior methanol tolerance and long‐term stability. These rapid and facile synthesis methodologies will enable quick optimization of reaction conditions and fast screening of compound libraries for searching new materials, paving the way to high‐throughput and autonomous nanomanufacturing.

中文翻译：

在激光诱导的石墨烯微反应器中快速合成沸石咪唑骨架

已经开发了多种合成沸石咪唑骨架（ZIF）的方法，例如溶剂热，声化学，微流体和机械化学反应。然而，它们中的大多数都很耗时并且涉及复杂的处理步骤，因此它们不能快速筛选潜在的候选物以按需获得ZIF。这样的挑战需要有效的合成方法。在此，通过采用两种非常规加热策略（即微波和焦耳加热）克服了这一挑战，这两种方法是由激光诱导石墨烯（LIG）微反应器诱导的，以快速合成ZIF。在第一个反应中，LIG用作感受器，吸收电磁能，该电磁能转化为热量。在后一种情况下，LIG充当将电能转化为热量的电导体。它们都可以迅速加热反应器，从而加速晶体生长，以合成具有良好控制的形态和结晶度的ZIF。为了演示概念上的应用，ZIF-67 / LIG复合材料由CO转换为Co / CoNC / LIG₂激光诱导的过程。它在氧还原反应中表现出出色的性能，其半波电位（E _1/2）为0.798 V，并且具有优异的甲醇耐受性和长期稳定性。这些快速而便捷的合成方法将能够快速优化反应条件，并快速筛选化合物库以寻找新材料，从而为高通量和自主的纳米制造铺平了道路。

更新日期：2019-01-22

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