4.2.3.4 Polymeric nanocomposites -- 4.3 General Approaches to Nanocomposite Fabrication -- 4.4 Applications of Nanocomposites in Pollution Control -- 4.4.1 Sensing and Detection of Pollutant -- 4.4.2 Catalytic and Redox Degradation of Contaminants -- 4.4.3 Adsorption of Pollutants -- 4.5 Future Prospects -- 4.6 Conclusions -- Chapter 5. Zinc Oxide-Based Nanocomposites for Photocatalytic Conversion of Organic Pollutants in Water -- 5.1 Introduction -- 5.1.1 What Is Zinc Oxide -- 5.1.2 What Is Photocatalytic Conversion of Organic Pollutants -- 5.2 Synthesis and Characterization of Zinc Oxide-Based Nanocomposite Photocatalysts -- 5.2.1 Solution Mixing -- 5.2.2 Sol-Gel Method -- 5.2.3 Hydro(Solvo) Thermal Approach -- 5.2.4 Microwave-Assisted Method -- 5.3 Applications of Zinc Oxide-Based Nanocomposites for Photocatalytic Conversion of Organic Pollutants -- 5.4 Degradation Mechanism of the Improved Photocatalytic Performance for Organic Pollutants Conversion -- 5.5 Summary and Perspectives -- Chapter 6. Polymer Nanocomposites as Nanoadsorbents for Environment Remediation -- 6.1 Introduction -- 6.2 Preparation of Polymer-Based Nanoadsorbents -- 6.3 Applications of Polymer-Based Nanoadsorbents -- 6.3.1 Removal of Organic Compound -- 6.3.2 Removal of Heavy Metals -- 6.4 Magnetic Polymer-Based Nanocomposites -- 6.5 Magnetic Nanocomposites -- 6.5.1 Core-Shell Inorganic Nanocomposites -- 6.5.2 Self-Assembled Colloidal Nanocomposites -- 6.5.3 Organic-Inorganic Nanocomposites -- 6.6 Synthesis of Magnetic Nanoparticles -- 6.6.1 Synthesis of Magnetic Polymer Nanocomposites -- 6.6.2 Application of Magnetic Polymer-Based Nanocomposites -- 6.6.2.1 Removal of heavy metals -- 6.6.2.2 Removal of oil -- 6.6.3 Multifunctional Nanocomposites -- 6.6.4 Applications of Multifunctional Nanocomposites -- 6.6.4.1 Removal of heavy metals -- 6.6.5 Solid Waste Treatment