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."

“由于对水质和稀缺性的关注，污染水的治疗变得越来越紧迫。因此，水生污染物的催化性退化是一个引起重大兴趣的研究领域。额外的研究驱动力是可持续发展的目标，可以为所有人提供清晰的水，从而使许多不同的材料受到了许多不同的材料，因此可能导致催化剂属于遗产。由于四环素（TC）在人类和兽医医学中广泛使用，以及在农业中的饲料添加剂，因此在环境水样品中通常在高水平中发现了特定和重要的环境和人类健康风险。策略。已经研究了两种维（2D）过渡金属二核苷作为环境相关反应的催化剂，包括氢，污染物降解等，并显示出巨大的希望。如何最好地以有效地催化这些反应的形式合成这些材料的问题是一个困难的问题。具有许多重要优势的一种方法是气溶胶辅助化学蒸气沉积（AACVD）。 AACVD带来的主要好处是，它自然会在玻璃支架上产生较薄的高表面积涂料。高表面积对于催化应用是关键的，而玻璃的高温稳定性和透明度则支持使人可以进入热/光催化作业。 AACVD已被用来生产2D过渡金属二硫化物，但迄今为止，2D过渡金属二苯甲酸酯和二苯胺已证明是难以捉摸的。初步数据表明，已经实现了2D钼的合成，但是需要进行更多的研究以获得健壮的高质量材料。此外，AACVD需要具有较高热稳定性的底物，例如硼硅酸盐玻璃，但是如果利用了导电玻璃（例如INSNO）等支撑，则可以实现许多令人兴奋的新应用，以实现这些支持的催化剂。因此，该项目的第二链将调查开发导电支持并在电催化反应中评估它们的可能性。目前，对于常规的硼硅酸盐支持的催化剂，这种方法是不可能的。该项目的目的是在综合方向和应用方向上进一步发展。利用新颖的底物进行合成过程，将允许对它们在降解这些有害污染物的功效中进行多种类型的催化。这样，这项工作的影响将被最大化。那些研究AACVD方法[6]和污染降解方法的人不仅会感兴趣的工作，而且种类繁多的种类将为从事其他应用程序（例如，传感和充电存储）的小组（例如，由于目前无法利用这种方法，因此无法利用这种方法，因此可以建立我作为独立研究人员的助理。一旦使用AACVD制备了材料，将进行水传播污染物的热，光催化和电催化降解。虽然最初的工作将使用易于追溯的染料化合物（例如亚甲基蓝色）进行，但随后工作将考虑降解更多局部污染物，例如诸如四环素等抗生素。最后，将评估现实世界的水样。”