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Contents

Chapter 1Introduction

1.1Research Background

1.1.1Development of Nuclear Power and

Utilization of Uranium

1.1.2Generation and Hazards of

Uraniumª²Containing Wastewater

1.1.3Significance of Uranium Enrichment and Separation

1.2Research Progress on Uranium Enrichment and Separation

1.2.1Extraction Method

1.2.2Chemical Precipitation Method

1.2.3Ion Exchange Method

1.2.4Membrane Separation Method

1.2.5Adsorption Method

1.3Carbon Dots

1.3.1Optical Properties of CDs

1.3.2Preparation Method of CDs

1.3.3Application of CDs in Metal Ion Detection

1.3.4Preparation and Application of CDs Composites

1.4Atmospheric Pressure Microplasma Electrode

1.5Significance and Content of the Research

Chapter 2Hydrothermal Preparation of Amino Acid Carbon Dots and

their Fluorescence Response to U(¢ö)

2.1Introduction

2.2Experimental Section

2.2.1Experimental Reagents and Apparatus

2.2.2Preparation of Amino Acid CDs With

Hydrothermal Method

2.2.3Fluorescence Quantum Yield Determination of CDs

2.2.4Fluorescence Response of CDs to

U(¢ö) and Other Metal Ions

2.2.5Quantification of Functional Groups on CDs

Surface by Potentiometric Titration

2.2.6Interaction of GlyCDs and U(¢ö) by

Potentiometric Titration

2.3Results and Discussion

2.3.1Preparation and Characterization

of Amino Acid CDs

2.3.2Investigation of the Fluorescence

Response Performance of CDs to U(¢ö)

2.3.3Investigation of the Fluorescence Response

Properties of CDs to Other Metal Ions

2.3.4Fluorescence Quenching Mechanism of

CDs After Binding to U(¢ö)

2.3.5The Interaction of CDs With U(¢ö)

by Potentiometric Titration

Chapter 3Preparation of EDACDs by Microplasma Method and

Their Fluorescence Response to U(¢ö)

3.1Introduction

3.2Experimental Section

3.2.1Experimental Reagents and Apparatus

3.2.2Preparation of EDACDs With Microplasma Method

3.2.3Preparation of HCDs by Hydrothermal Method

3.2.4Application of EDACDs in U(¢ö) Detection

3.3Results and Discussion

3.3.1Preparation and Characterization of CDs

3.3.2Study of the Reaction Mechanism

3.3.3Application of EDACDs in U(¢ö) Detection

Chapter 4Preparation of PDCDs by Microplasma Method and Their

Fluorescence Response to U(¢ö)

4.1Introduction

4.2Experimental Section

4.2.1Experimental Reagents and Apparatus

4.2.2Preparation of PDCDs With Microplasma Anode

4.2.3Dopamine Polymerization Assisted

With Microplasma Cathode

4.2.4Mechanistic Study of Dopamine Polymerization

4.2.5Application of PDCDs in U(¢ö) Detection

4.3Results and Discussion

4.3.1Preparation and Characterization of PDCDs

4.3.2Study of The Mechanism of

Dopamine Polymerization

4.3.3Application of PDCDs in U(¢ö) Detection

Chapter 5Preparation of CDs/SBAª²NH2 Composites and Their Application

in U(¢ö) Adsorption Monitoring

5.1Introduction

5.2Experimental Section

5.2.1Experimental Reagents and Apparatus

5.2.2Preparation of SBAª²NH2

5.2.3Preparation of CDs/SBAª²NH2 Composites

5.2.4U(¢ö) Adsorption Experiments

5.2.5Online Monitoring of U(¢ö) Adsorption Process

5.3Results and Discussion

5.3.1Characterization of CDs/SBAª²NH2 Composites

5.3.2Adsorption and Fluorescence Response

of Composites to U(¢ö)

5.3.3Online Monitoring and Selectivity

Evaluation of Adsorption Processes

5.3.4Desorption Properties of the Composites

Chapter 6Conclusion and Outlooks

6.1Conclusion

6.2Innovativeness

6.3Outlooks

References

Academic Papers and Research Achievements During the Ph.D. Period

Appendix AMicroplasmaª²Assisted Dopamine Polymerization and Its

Application in Material Surface Modification

Acknowledgements