Aerosol assisted chemical vapour deposition (AACVD) of 2D TMDCs for aqueous pollutant degradation

用于降解水污染物的二维 TMDC 气溶胶辅助化学气相沉积 (AACVD)

• 批准号: 2885965
• 金额: --
• 依托单位: Aston University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2885965
• 关键词: Aerosol; assisted; chemical; vapour; deposition

"Treatment of polluted water is becoming increasingly urgent as concerns about water quality and scarcity become increasingly prevalent. Consequently, catalytic degradation of water-borne pollutants is a research area attracting significant interest. An additional research driver is the United Nations Sustainable Development Goal to provide clear water to all. Accordingly, many different materials have been investigated as potential treatment catalysts. There are many pollutants that can cause concern, one of which is antibiotics. Antibiotics such as tetracycline (TC) are extensively used in both human and veterinary medicine, as well as a feed additive in agriculture therefore, TC is often found at high levels in environmental water samples presenting a specific and significant environmental and human health risk e.g., the development of new antibiotic-resistant bacterial strains. This is motivating significant research into methodologies for removing TC from aqueous systems as part of water treatment strategies.Two-dimensional (2D) transition metal dichalcogenides have been investigated as catalysts for environmentally relevant reactions including hydrogen generation, pollutant degradation etc. and show significant promise. The issue of how best to synthesise these materials in a form that is effective for catalysing these reactions is a difficult one. One method that offers many significant advantages is aerosol-assisted chemical vapour deposition (AACVD). The principal benefits that AACVD brings is that it naturally yields materials as thin, high surface area coatings on glass supports. High surface area is pivotal for catalytic applications, whilst the high temperature stability and transparency of the glass supports enable facile integration into thermal/photocatalytic operations. AACVD has been utilised to produce 2D transition metal disulphides but to date 2D transition metal diselenides and ditellurides have proved elusive. Preliminary data indicates that the synthesis of 2D molybdenum diselenide has been achieved but more investigation is needed to obtain robust, high-quality materials. Additionally, AACVD requires substrates with high thermal stability, such as borosilicate glass, however a plethora of exciting new applications for these supported catalysts could be realised if supports such as conductive glasses (e.g., InSnO) were utilised. Accordingly, a second strand of this project will investigate the possibility of developing conducting supports and assessing them in electro-catalytic reactions. Currently such an approach is just not possible with conventional borosilicate-supported catalysts.This project aims to go further in both the synthetic and applications focussed directions. Utilising novel substrates for the synthesis process will allow for a wider variety of types of catalysis to be tested for their efficacy in degrading these damaging pollutants. In this way the impacts of this work will be maximised. Not only will the work be of interest to those researching the AACVD method [6] and pollution degradation methods but the increased variety of substrates will open up the AACVD method to groups working on other applications (e.g., sensing and charge storage) who are currently prevented from utilising this method due to the inert nature of the substrates thus establishing me as an independent researcher in this field. Once the materials have been prepared using AACVD, the thermal, photocatalytic and electrocatalytic degradation of waterborne pollutants will be performed. Whilst initial work will be done using easily traceable dye compounds such as methylene blue, work will then move to considering degrading more topical pollutants such as antibiotics like tetracycline. Finally, real-world water samples will be assessed."

“随着对水质和稀缺性的担忧日益普遍，污染水的处理变得越来越紧迫。因此，水传播污染物的催化降解是一个引起人们极大兴趣的研究领域。另一个研究驱动力是联合国可持续发展目标，即为所有人提供洁净的水。因此，许多不同的材料已被研究作为潜在的处理催化剂。有许多污染物可能引起关注，其中之一是抗生素。抗生素等 由于四环素 (TC) 广泛用于人类和兽医药物以及农业饲料添加剂，因此，环境水样中经常发现高含量的 TC，这会带来特定且重大的环境和人类健康风险，例如，产生新的抗生素抗性细菌菌株。这推动了对作为水处理一部分从水系统中去除 TC 的方法的重要研究 二维（2D）过渡金属二硫属化物已被研究作为环境相关反应（包括氢气生成、污染物降解等）的催化剂，并显示出巨大的前景。如何以有效催化这些反应的形式最好地合成这些材料是一个困难的问题。气溶胶辅助化学气相沉积 (AACVD) 是一种具有许多显着优点的方法。 AACVD 带来的主要好处是它可以自然地在玻璃支撑物上生成薄的、高表面积的涂层。高表面积对于催化应用至关重要，而玻璃载体的高温稳定性和透明度使得能够轻松集成到热/光催化操作中。 AACVD 已用于生产二维过渡金属二硫化物，但迄今为止，二维过渡金属二硒化物和 二碲化物已被证明难以捉摸。初步数据表明，二维二硒化钼的合成已经实现，但需要更多的研究才能获得坚固的高质量材料。此外，AACVD 需要具有高热稳定性的基材，例如硼硅酸盐玻璃，但是，如果导电玻璃等载体可以实现这些负载型催化剂的大量令人兴奋的新应用 （例如，InSnO）被利用。因此，该项目的第二部分将研究开发导电载体并在电催化反应中评估它们的可能性。目前，这种方法对于传统的硼硅酸盐负载的催化剂来说是不可能的。该项目旨在在合成和应用方向上进一步发展。在合成过程中使用新颖的底物将允许更广泛的种类 需要测试催化类型在降解这些破坏性污染物方面的功效。通过这种方式，这项工作的影响将得到最大化。这项工作不仅会引起研究 AACVD 方法 [6] 和污染降解方法的人们的兴趣，而且基板种类的增加将为从事其他应用（例如传感和电荷存储）的小组开放 AACVD 方法，而这些小组目前由于无法使用该方法而无法使用该方法。 底物的惰性性质使我成为该领域的独立研究员。一旦使用AACVD制备了材料，就可以对水污染物进行热催化、光催化和电催化降解。虽然最初的工作将使用易于追踪的染料化合物（例如亚甲基蓝）来完成，但随后的工作将转向考虑降解更多的局部污染物，例如抗生素等 四环素。最后，将对现实世界的水样进行评估。”