This book delves into the realm of sustainable energy and presents a comprehensive analysis of novel nanomaterials with potential applications in this field. Each chapter offers a unique perspective, contributing to the understanding and development of advanced energy materials. From the infrared spectroscopy analysis of boron nitride nanotubes to the investigation of optical properties of ZnO thin films and the study of double perovskite oxides, this collection covers a wide range of topics. It explores iron-based nitrides, phase change materials for smartphones, thermochromic glazing with vanadium dioxide, and the influence of magnetic pressure on smart materials. The physical properties and applications of 2D phosphorene, carbon nanotube interactions, and metalloporphyrin-encapsulated carbon nanotubes are also discussed. Moreover, the collection investigates the thermal and phonon properties of carbon nanomaterials, optoelectronic properties of perovskite materials, and the physical properties of phosphorene nanotubes. Featuring extended chapters selected as exceptional contributions to the 2023 International Conference on Advanced Materials for Sustainable Energy and Engineering in Meknes, Morocco, this book provides researchers and practitioners with a comprehensive overview of some of the latest advancements in novel nanomaterials. With its interdisciplinary approach and rigorous scientific analysis, this edited collection serves as a valuable resource for those striving to develop sustainable energy solutions for the future.