Titanium dioxide, TiO2, in all its forms, exhibits distinctive physical and chemical properties and has emerged as one of the most fascinating materials in the modern era. It has succeeded in capturing the attention of chemists, physicists, engineers and material scientists in exploring its distinctive and unique properties for its utility in different fields such as energy, environment, pigment, fibre, pharmaceuticals, food, etc. This book is devoted to recent research trends in TiO2. It contains chapters contributed by outstanding experts who have extensively worked on different aspects of TiO2. This book focuses on interdisciplinary perspectives of current challenges for the solution of real world problems. In this book, research manuscripts are shortened as single chapters and the focus is on one hot topic. This book is written at the expert level, but also serves as a guide for researchers or graduate students aiming to enter TiO2 research. Finally, readers will get a deep and active insight into state-of-the art synthesis techniques, application and toxicity of TiO2.