EAGER: Synthesis of Nano Embedded Zeolites for Water Pollutant Removal

1650278 Shipley纳米技术具有实现和推进水处理的潜力。该项目的总体目标是使用环境友好和更快的合成方法合成纳米二氧化钛和纳米二氧化钛/二硫化钼纳米片嵌入沸石，以去除选定的水污染物，用于小型个人和/或中央公有处理系统的水处理技术的未来发展。纳米复合材料的发展创造了新的污染物处理技术的潜力，由于其独特的物理化学性质。它们的大表面积沿着其独特的化学优势，例如离子选择性和增加的动力学，使得纳米颗粒成为理想的吸附剂，因为甚至可以发生在表面上的弱吸附。此外，MoS 2以其光催化活性而闻名，但很少有研究调查这种材料与TiO 2结合的优势。然而，使用纳米颗粒可能存在缺点，这是由于有问题的结果，例如在处理过程中的分离和通过成品水。拟议的工作将通过工程沸石嵌入纳米二氧化钛和具有特定性能的纳米二氧化钛/二硫化钼纳米片来解决这些问题，假设这将导致由于TiO 2和MoS 2纳米系统的组合属性而增强的污染物去除，以及降低成本和潜在毒性，并改善处理过程中的分离。其结果将确定选择的污染物的吸附能力和光催化活性。与传统的水处理吸附剂相比，预计这项研究将产生一种新的高效和成本效益的吸附剂。SEM/FIB将用于表征沸石和纳米材料之间的界面，以了解嵌入沸石中的纳米颗粒和纳米片的稳定性，确定吸附后表面形态的变化，并帮助评估负载效率。本论文的主要目标是：1）合成和表征纳米TiO 2和纳米TiO 2/MoS 2包埋沸石; 2）通过批量研究评价其吸附能力和光催化活性。这些材料具有通过增强吸附性、选择性和动力学来改善水质的潜力;有助于遵守州和联邦饮用水法规;并降低处理成本。水的安全性和可用性是美国国家工程院面临的重大挑战，与全球健康、能源生产和经济发展密不可分。这些材料具有通过增强吸附、选择性、光催化活性和动力学来改善水质的潜力;有助于遵守州和联邦饮用水法规;并降低处理成本。因此，本研究中提出的嵌入式沸石具有市政水处理之外的应用，并且可以用作发展中国家、美国偏远地区的处理系统，和行业UTSA是一所少数民族服务机构，约有29，000名学生，其中约一半来自西班牙裔背景。拟议的工作促进了使用创新材料解决水污染问题的研究项目，同时培训下一代科学家和工程师。它还创造了新的研究机会，同时鼓励研究生的参与。需要新技术来继续推进饮用水处理;测试纳米嵌入沸石将允许向适用于柱操作的介质的应用的进步，并探索纳米材料和纳米复合材料之间的表面相互作用和差异。如果这些复合材料可以再生和再利用，那么除了饮用水处理之外，还有许多可能的环境应用，例如油田或反渗透盐水的处理。

1650278ShipleyNanotechnology holds the potential to enable and advance water treatment. The overall goal of this project is to synthesize nano titania and nano titania/molybdenum disulfide nanosheet embedded zeolites using environmentally friendly and faster synthesis methods to remove selected water pollutants for future development of water treatment technologies for small individual and/or central, publicly owned treatment systems. The development of nanocomposites creates the potential for new pollutant treatment technologies due to their unique physiochemical properties. Their large surface area along with their distinct chemical advantages, such as ion selectivity and increased kinetics, make nanoparticles ideal sorbents, since even weak sorption onto the surface can occur. In addition, MoS2 is known for its photocatalytic activity, but few studies have investigated the advantage of this material in combination with TiO2. There can be drawbacks to using nanoparticles, however, due to problematic results such as separation during treatment processes and passage through to finished water. The proposed work will address these issues by engineering zeolites embedded with nano titania and nano titania/molybdenum disulfide nanosheets with specific properties, it is hypothesized that this will lead to enhanced pollutant removal due to the combined attributes of TiO2 and MoS2 nanosystems as well as a reduction in cost and potential toxicity, and improved separation during treatment. The results will determine the adsorption capacities, and photocatalytic activity of select pollutants. Compared to traditional water treatment sorbents, it is expected that this research will yield a new efficient and cost effective sorbent. SEM/FIB will be used to characterize the interface between the zeolite and nanomaterials to understand the stability of the nanoparticles and nanosheets embedded in the zeolites, to determine the changes in the surface morphology after adsorption, and to help assess the loading efficiencies. In the proposed effort, the objectives are to: 1) synthesize and characterize nano-TiO2 and nano-TiO2/ MoS2 embedded zeolites; 2) assess their adsorption capacities and photocatalytic activity through batch studies. These materials have the potential to improve water quality through enhanced adsorption, selectivity, and kinetics; help with compliance of state and federal drinking water regulations; and reduce treatment costs. The safety and availability of water are a National Academy of Engineering Grand Challenge inextricably linked to global health, energy production, and economic development. These materials have the potential to improve water quality through enhanced adsorption, selectivity, photocatalytic activity and kinetics; help with compliance of state and federal drinking water regulations; and reduce treatment costs. Hence, the embedded zeolites proposed in this study have applications outside of municipal water treatment and could be used as treatment systems in developing countries, remote regions of the U.S., and industry. UTSA is a minority serving institution with a population of about 29,000 students of which roughly half are from a Hispanic background. The proposed work promotes research projects that use innovative materials to address water contamination issues while training the next generation of scientists and engineers. It also creates new research opportunities while encouraging the involvement of graduate students. New technologies are needed to continue to advance potable water treatment; testing nano embedded zeolites will allow for advancement towards applications with media suitable for column operation and for exploring the surface interactions and differences between nanomaterials and the nano composites. If these composite can be regenerated and reused then there are many possible environmental applications beyond potable water treatment such as treatment of oilfield or reverse osmosis brine.