石墨烯氧化物与5-甲基-1,3,4-亚二醇-2-胺共振功能,用于pH敏感的Ga3+ 在水溶液中恢复
Xi Zhu1, Yong Guo1, Baozhan Zheng1
1College of Chemistry, Sichuan University, Chengdu 610065, China.
Molecules (Basel, Switzerland)
|August 29, 2024
概括
一种新的石墨烯氧化物复合物 (GO-MTA) 从水中选择性地吸附离子 (Ga3+). 这种新型吸附剂显示出高容量和Ga3+分离和丰富的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 石墨烯氧化物 (GO) 是一种多功能纳米材料,在吸附中具有潜在的应用.
- 开发用于金属离子的选择性吸附剂对于环境修复和资源回收至关重要.
- 5-甲基-1,3,4-亚二醇-2-胺 (MTA) 功能化提供了一条定制GO属性的途径.
研究的目的:
- 开发一种新的基于石墨烯的复合材料,用于选择性 (Ga3+) 离子吸附.
- 调查Ga3+复合物的吸附能力,动力学和机制.
- 评估复合物的Ga3+从水溶液中分离的潜力.
主要方法:
- 石墨烯氧化物与5-甲基-1,3,4-亚二醇-2-胺 (MTA) 的共价功能化产生GO-MTA.
- 批量吸附实验研究接触时间,温度,初始度和pH的影响.
- 使用兰迈尔和伪二阶模型的吸附同温和运动建模.
- 使用SEM-EDS,元素映射,FT-IR和XPS进行表征,以阐明吸附机制.
主要成果:
- 在GO-MTA复合物中,Ga3+ (48.20 mg g-1) 与In3+和Sc3+相比呈现出选择性吸附.
- 在优化条件下,Ga3+的最大吸附能力为55.6mgg-1 .
- 吸附遵循伪二阶动力学和兰迈尔异热模型,表明化学吸附和单层吸附.
- 鉴定证实了涉及GO-MTA上的功能群的吸附机制.
结论:
- GO-MTA复合物是一种有前途的吸附剂,用于选择性去除Ga3+.
- 该材料表现出高吸附能力和高效率的Ga3+丰富.
- 这项研究强调了功能化石墨烯氧化物在从水环境中分离有价值或有毒的金属离子方面的潜力.
更多相关视频
09:15Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors
Published on: November 22, 2016
10.6K
07:51Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
Published on: February 1, 2022
3.2K
相关概念视频
Polyprotic Acids
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
Leveling Effect and Non-Aqueous Acid-Base Solutions
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
Stomach pH Regulation
The human body carefully regulates the internal pH of different organs to maintain homeostasis. For example, while the blood plasma maintains a neutral pH of 7, the stomach lumen has an acidic pH of 1.5 - 3.5. The low pH of stomach lumen helps kill pathogens in the food and break down complex food molecules.
The acid-secreting gastric mucosal epithelial cells (parietal cells) lining the stomach lumen maintain the low pH in the lumen. Numerous ion transporters and channels on these parietal...
The acid-secreting gastric mucosal epithelial cells (parietal cells) lining the stomach lumen maintain the low pH in the lumen. Numerous ion transporters and channels on these parietal...
Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids
In the complex environment of the gastric lumen, excessive acid secretion can lead to the formation or worsening of ulcers within the delicate mucosal layer. Antacids, such as sodium bicarbonate and calcium carbonate, provide relief by neutralizing this acid, transforming it into harmless salt and water. This neutralization process raises the gastric pH from a highly acidic level of 1 to a more basic 3-4, reducing the acidity within the stomach.
However, this neutralization reaction between...
However, this neutralization reaction between...
