Sustainable Composites for Future Trends in Renewable Energy

Magnetic nanocomposites are among the most significant categories of materials because they have excellent magnetic, thermal, and mechanical characteristics for use in various professions. The progress made in the last half decade has stemmed from the preparation of new nanocomposites that display enhanced performance in healthcare, environmental treatment, the energy industry, and electronics. Various synthesis methods for producing M-TiO2 have been enhanced effectively, including co-precipitation, sol-gel processes, and hydrothermal synthesis to possess the required structural and functional characteristics. Magnetic nanoparticles, which have been approved for targeted drug delivery combined with polymers, ceramics, and metal matrices, offer expanded functionality in applications such as MRI and catalytic systems. Nevertheless, some problems of the approach include the problems of scalability, stability, and environmental impact that may require further inquiries. In this chapter, we focus on the recent progress, including computational modeling, artificial intelligence, and green chemistry. The last one is devoted to present trends, where the roles of bioinspired and hybrid magnetic nanocomposites in shaping future technologies are described.

The potential of Polymer Nanocomposites (PNCs) to enhance energy systems' performance and efficiency while providing sustainability advantages has drawn a lot of interest in the field of renewable energy. These materials' mechanical, thermal, and electrical properties are improved by the integration of nanoparticles into a polymer matrix. The usefulness of polymer nanocomposites is greatly influenced by their processing, with methods like melt mixing, solution casting, and in situ polymerization being often employed. The structural, morphological, and mechanical characteristics of these materials are evaluated using characterization techniques such as spectroscopy, microscopy, and thermal analysis. PNCs are also categorized according to their composition and use, with an emphasis on technology for energy conversion, storage, and harvesting. PNCs have been investigated for use in solar cells, batteries, fuel cells, and supercapacitors in the field of renewable energy, which will improve durability, energy efficiency, and environmental sustainability. The production, characterization, and classification of polymer nanocomposites are covered in this paper, along with how they contribute to the development of sustainable and renewable energy systems. PNCs' success in the renewable energy industry depends on resolving issues of cost-effectiveness, reliability, and scalability.

Piezoelectric energy harvesting is a promising technology; basically, this technology is used to convert ambient waste energy into usable electrical energy. This technique is typically employed to transform diffuse wasted energy into usable electrical energy. For energy harvesting applications, polymeric piezoelectric composites are regarded as a key study area because they provide the convenience of mechanical flexibility. The nature of the piezoelectric phenomena, the fundamental theory underlying Piezoelectric Energy Harvesting (PEH) devices, and the configuration used to fabricate PEH are explained at the outset. 

The topic of energy harvesting is very important because of the rising power consumption and environmental concerns. Extensive research is being done on Poly (Vinylidene Fluoride) PVDF and its copolymers for the purpose of developing energy harvesting devices. This chapter deals with the various types of piezoelectric devices and their working principle, along with their applications. The use of PVDF and its nanocomposites in piezoelectric devices makes them promising due to their outstanding properties, such as ease of processing, good flexibility, good biocompatibility, high stability, etc. Also, the applications of PVDF-based piezoelectric materials in energy harvesting devices such as sensors, biomedical science, flexible and hybrid nanogenerators, etc., are discussed.

This chapter discusses the cutting-edge polymer nanocomposite energy harvesting technology. Attention has been drawn to polymer nanocomposites, which combine polymers and nanoparticles, for their potential for effective energy conversion. Polymer nanocomposites are used in piezoelectric, thermoelectric, and photovoltaic systems to transform mechanical, thermal, and light energy into electrical energy. Techniques like nanofillers and interface engineering maximize the effectiveness of energy conversion. Improvements in characterization, modeling, and manufacturing techniques are essential for commercialization. Polymer nanocomposites can potentially be used for energy harvesting in self-powered sensors, Internet of Things (IoT) devices, and wearable electronics. In order to advance sustainable energy solutions, this chapter outlines current research initiatives and future uses of polymer nanocomposites. 

This book chapter provides a comprehensive overview of conducting polymer nanocomposites, including their types and potential applications. The article highlights six types of conducting polymer nanocomposites, which include metal nanoparticles, carbon nanotubes, graphene, metal oxide nanoparticles, nanocellulose, and clay nanoparticles. Additionally, the chapter discusses the various methods available for the synthesis of conducting polymer nanocomposites, which include in situ polymerization, solution blending, in situ reduction, electrochemical deposition, and layer-by-layer assembly. Overall, this chapter serves as a valuable resource for researchers interested in the synthesis and application of conducting polymer nanocomposites.

The growing demand for sustainable and eco-friendly technologies has spurred significant interest in the development of biodegradable materials with multifunctional capabilities. Biodegradable nanocomposites have emerged as a promising solution to address various environmental challenges while enabling advanced applications in piezoelectric sensors, fuel cells, and energy harvesting devices. This comprehensive review delves into the recent advancements and key considerations in the design, fabrication, and application of biodegradable nanocomposites for these vital technologies. In conclusion, the development of biodegradable nanocomposites presents a transformative opportunity to merge sustainability with cutting-edge technologies. This review underscores the pivotal role of these materials in piezoelectric sensors, fuel cells, and energy harvesting devices.

In recent years, carbon-based nanostructured materials have emerged as promising candidates for addressing the challenges associated with increasing energy demand and environmental degradation. These materials exhibit exceptional properties such as enhanced electrical conductivity, mechanical strength, and thermal stability, making them attractive for various applications in energy harvesting and environmental remediation. Carbon-based nanostructured materials have garnered significant attention from the scientific community due to their superior electrical, mechanical, and electronic/optoelectronic properties. In this chapter, we present a systematic overview of the advancements in carbon-based nanostructured materials for environmental and energy harvesting applications. Furthermore, we discuss their practical applications in environmental remediation and energy technologies. Specific focus is given to their roles in supercapacitors, solar cells, and batteries.

The burgeoning demand for sustainable and renewable energy solutions has accelerated advancements in Nanogenerators (NGs) based on polymers. These innovative devices harness piezoelectric, triboelectric, and pyroelectric effects for energy harvesting, offering transformative solutions in wearable electronics, biomedical applications, and the Internet of Things (IoT). With their unique ability to convert mechanical and thermal energies into electrical power, polymer-based nanogenerators exemplify the synergy between nanotechnology and material science. This review delves into the evolution of these devices over the last two decades, highlighting key advancements in materials, fabrication techniques, and application domains. Additionally, challenges such as scalability, energy conversion efficiency, and environmental impact are discussed alongside strategies for addressing these limitations. By emphasizing the sustainable potential of polymer-based nanogenerators, this work aims to provide insights into their role in the future of energy technology and their application in diverse fields, from healthcare to smart cities.

Polymeric active materials have emerged as a promising class of materials that will likely lead the way in energy conversion and storage. Materials such as conductive polymers, polymer composites, and polymer electrolytes are being processed to enhance energy-delivery devices like batteries, supercapacitors, and photovoltaic cells. The challenges in polymeric energy materials are related totheir stability, scalability, and behavior under extreme operating conditions. It calls for extraordinary solutions in designing materials, manipulating methods of processing the material, and enhancing properties like electrical conductivity, mechanical properties, and flexibility. The prospects for industrializing polymeric energy materials offer advantages because they can be engineered to be lighter, more efficient, and ecofriendly for energy delivery. These new materials, if incorporated successfully into commercially viable products, can lead to the fourth generation of energy materials needed for further development of sustainable energy and non-renewable resources such as fossil fuels.

Carbon Nanotubes (CNTs) are nanoscale cylindrical structures composed of carbon atoms with diverse applications in supercapacitors, artificial muscles, and intelligent textiles. An Incandescent Tension Annealing Process (ITAP) can significantly enhance their mechanical and electrochemical properties, improving energy harvesting capabilities. The experimental observations reveal that during the 1 Hz sinusoidal stretching cycle, the peak-to-peak Open Circuit Voltage (OCV) and Short Circuit Current (SCC) generated by ITAP yarn were more than 1.5 times that of pristine CNT. The densified surface of ITAP yarn results in about a 20% reduction in capacitance when it is stretched to about 30% strain. A noticeable negative shift in the values of the potential of ITAP yarn suggests greater charge injection when immersed in the electrolyte. Thus, the factors—namely, the pronounced changes in capacitance and the increased initial charge injection—are key contributors to the enhanced energy harvesting performance of ITAP yarn compared to untreated CNTs.

The demand for renewable and sustainable energy sources has made energy harvesting a crucial field of study. This study examines cutting-edge energy harvesting technologies with an emphasis on the application of polymer nanocomposites. Combining polymers with nanoscale components to create polymer nanocomposites offers special benefits such as improved thermal stability, electrical conductivity, and mechanical qualities. Because of these qualities, they are good candidates fordeveloping energy harvesting devices that effectively transform ambient energy sources—such as mechanical, thermal, and solar energy—into electrical energy that can be used. The review examines many processes for creating polymer nanocomposites and how they are used in energy harvesting devices. The usefulness of methods like electrospinning, solution casting, and melt blending in improving the efficiency of energy harvesting devices is highlighted. The electrical characteristics of polymer matrices are greatly enhanced by the use of nanoparticles, such as metal oxides, graphene, and carbon nanotubes, which raises energy conversion efficiency. The study also looks at certain energy harvesting uses for polymer nanocomposites, such as solar cells, thermoelectric devices, and piezoelectric generators. These materials are positioned as competitive substitutes for conventional energy harvesting technologies due to their ability to provide flexible, lightweight, and long-lasting energy harvesting devices. It is observed from the review study that by demonstrating the revolutionary potential of polymer nanocomposites in energy harvesting applications, the ongoing developments in materials science and nanotechnology open the door to the creation of novel solutions that can make a substantial contribution to the worldwide effort to achieve sustainable energy, tackling the problems brought on by environmental concerns and energy demand. Future research should concentrate on improving these technologies' scalability and performance to allow for broad adoption across a range of industries. 

 Energy harvesting represents a transformative strategy for capturing ambient energy and converting it into usable electrical power, thereby enabling the operation of electronic systems without reliance on conventional energy supplies such as batteries or wired connections. Polymers have emerged as a pivotal class of materials in this domain owing to their structural versatility, tunable properties, and potential alignment with sustainability goals. With the growing global demand for renewable and decentralized energy solutions—particularly for autonomous, wireless, and portable electronics—polymer-based energy harvesters are gaining increasing prominence. Sustainable polymers, derived from renewable or recycled precursors, offer distinct advantages including mechanical robustness, corrosion resistance, and biodegradability, thus meeting both environmental and economic imperatives. Nevertheless, conventional synthetic polymer production and disposal practices remain environmentally unsustainable, exacerbating resource depletion and pollution. To address these limitations, current research is advancing the development of polymers engineered within closed-loop life cycles to minimize ecological burden. Emerging innovations, such as photovoltaic-integrated sound barriers, polymer-based nanomaterials, thermoelectric generators, and induction-driven energy systems, highlight the expanding scope of polymer applications in this field. This chapter concludes by critically evaluating key challenges—most notably the enhancement of energy conversion efficiency, scalability, and techno-economic viability—while underscoring the pivotal role of advanced sustainable polymers in shaping the next generation of energy harvesting technologies.

Biobased resorbable polymeric nanocomposites are the biggest breakthroughs in the search for green and eco-friendly healthcare compounds. These biobased materials incorporate biodegradability characteristics with good mechanical, thermal, and biological properties, which are attributable to the nanoscale reinforcements. These nanocomposites help meet the fast-emerging need for green and biocompatible materials in applications such as drug delivery systems, tissue engineering scaffolds, and medical implants. Their ability to not cause any harm upon being metabolized in the human body and maintain their structure during their utilitarian lifespan keeps their environmental footprint and healthcare visitors’ waste level to a bare minimum. This paper aims to review the state of existing knowledge, limitations, and opportunities associated with the use of resorbable polymeric biobased nanocomposites in healthcare to establish them as a part of the sustainable future in medical technology. 

Rapid urbanization has a significant impact on various components of the environment, putting stress on energy reservoirs. These effects targeting human health risks, in particular, include air pollutants, wastewater load, poor sanitation, etc. Unsustainable urbanization has also led to a surge in energy requirements for domestic, industrial, road, and transport use. To address such issues, different methodologies have been employed to treat different wastewater types, remove gaseous pollutants, and develop technological interventions that lead to energy harvesting. In recent years, among several approaches, Carbon-Based Nanocomposites (CBNs) have been recognized by the scientific community in several fields, including energy and the environment, because of their increased “surface area to volume ratio”, good chemical stability, higher conductivity, reduced toxicity, high dispersibility, excellent thermal, mechanical, and electrical properties, cost-effectivity, facile synthesis, the scope of surface functionalization, biocompatibility, etc.

This chapter draws attention to the application of various Carbon-Based Nanomaterials (CBNs) (such as polymer nanocomposites, graphene, Graphene Oxide (GO), reduced GO (rGO), graphite, activated carbon, etc.) (i) for the detection of heavy metals, pesticides, bacteria, etc., in contaminated water and their efficient removal, (ii) for the degradation and removal of organic species from wastewater, (iii) as environmental sensors for detecting toxic gases, and (iv) as mechanical sensors and energy-harvesting devices. Further, the latest developments, current challenges, and future scope of research in CBNs for enhanced environmental and energy-harvesting applications have also been discussed.

This chapter examines the latest developments in metal oxide nanocomposites and their uses in energy harvesting devices. The chapter begins with a brief overview of metal oxide nanocomposites, emphasizing their makeup and importance in improving energy conversion processes, including thermoelectric, solar, and piezoelectric ones. A thorough review of current developments exposes cuttingedge synthesis methods and the advantages of nanostructuring, which enhance the performance and characteristics of materials. Several forms of metal oxide nanocomposites are classified in this chapter, emphasizing the widely used materials such as ZnO, TiO2 , and SnO2 , along with novel hybrid systems that blend metal oxides with polymers or other materials for improved performance. A detailed discussion is also included regarding the fabrication processes and characterization methodologies that evaluate the performance of these nanocomposites, highlighting their potential applications in solar energy, waste heat recovery systems, and wearable technology. Additionally, the drawbacks and restrictions of metal oxide nanocomposites, including scalability and material stability, are also addressed in this chapter. Emerging materials and their potential integration into smart energy systems are highlighted below, along with future trends and research directions. A case study shows its practical applications and is included in the chapter's conclusion, along with consideration of these materials' sustainability and effects on the environment in the current situation. By comparing metal oxide nanocomposites with other nanomaterials, we highlight the advantages of these materials as well as potential market trends. This comprehensive study thus aims to shed light on the ground-breaking significance that metal oxide nanocomposites play in the search for durable and efficient energy harvesting technologies. 

Magnetic nanocomposites have become increasingly important materials in distinct fields in terms of application and potential, such as biomedical engineering, environmental chemistry, energy storage, and the electronic industry. These materials incorporate characteristics of nanoparticles with the structural benefits of composite matrices, including high thermal stability, magnetic responsivity, and multi-functional properties. Recent advancements have been determined by improvements in synthesis methods, performance, and modified properties for various uses. Advancements in biomedical applications, such as drug targeting, magnetic hyperthermia, and biosensors, point towards a revolutionary future for healthcare. At the same time, they are becoming more involved in clean energy technologies such as supercapacitors and catalysts in the process of energy conversion. Machine learning for property prediction is another area that needs to be focused on, and the development of novel green synthesis methods is the major future research direction. This paper presents an analysis of magnetic nanocomposites and, additionally, future developments that suggest advancements in various fields with various challenges to combating world issues.