在现场界面pH检测的方法
在PubMed上查看摘要
概括
此摘要是机器生成的。研究人员开发了一种准确测量功能化材料表面pH值的方法. 这种技术使用pH敏感的染料和显微镜,使环境感应和材料特征精确.
科学领域
- 材料科学
- 表面化学
- 分析化学
背景情况
- 功能化表面在各种行业中至关重要.
- 用aminosilanes修改表面会改变表面pH值,使测量变得复杂.
- 准确的界面pH监测对于了解表面的行为至关重要.
研究的目的
- 开发一种可靠的现场界面pH监测方法.
- 调查界面和总体pH之间的关系.
- 为了实现先进的材料特征和环境传感.
主要方法
- 用与氨基联的pH敏感光染料使玻璃表面具有功能.
- 使用共聚焦显微镜测量染料对pH值变化的光反应.
- 开发表面化学和静电相互作用的理论模型.
主要成果
- 在界面和批量pH之间发现了线性关系.
- 与散体pH相比,表面pH的范围较窄.
- 植入染料的校准光反应允许精确的pH监测.
结论
- 综合方法可以准确可靠地在现场进行界面pH监测.
- 这种方法对环境传感应用具有重大潜力.
- 这些发现有助于先进的材料表征技术.
相关概念视频
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than...
The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium...

