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The pH dependent surface charging and points of zero charge. IX. Update
1Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
Advances in Colloid and Interface Science
|September 8, 2021
Summary
This review compiles points of zero charge (PZC) and isoelectric points (IEP) for various materials, highlighting experimental conditions. New data aligns with existing literature, with novel IEPs reported for Gd(OH)3, Sm(OH)3, and TeO2.
Area of Science:
- Surface Chemistry
- Materials Science
Background:
- Points of zero charge (PZC) and isoelectric points (IEP) are critical for understanding material surface behavior.
- Previous compilations have overlooked older, relevant data.
- Experimental conditions significantly influence PZC and IEP measurements.
Purpose of the Study:
- To compile and review recent and overlooked older literature on PZC and IEP.
- To emphasize the impact of experimental conditions on PZC/IEP values.
- To compare new findings with existing data and report novel IEPs.
Main Methods:
- Literature review and compilation of published PZC and IEP data.
- Analysis of experimental parameters including temperature, electrolyte type/concentration, and apparatus.
- Comparison of newly reported values with historical data.
Main Results:
- A comprehensive collection of PZC and IEP data from recent and older literature.
- Demonstration of the significant role of experimental conditions on measured values.
- New IEPs reported for Gadolinium hydroxide (Gd(OH)3), Samarium hydroxide (Sm(OH)3), and Tellurium dioxide (TeO2).
Conclusions:
- Recent findings on well-documented materials are consistent with established literature.
- The study provides an updated and expanded resource for PZC and IEP data.
- Novel isoelectric points for specific metal hydroxides and oxides have been identified.
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