Morphology-dependent gas sensing properties of bismuth vanadate nanomaterials: A promising approach for environmental monitoring

• Main Authors: Sagadevan, Suresh, Soga, Tetsuo
• Format: Article
• Published: Elsevier B.V. 2024
• Subjects: QD Chemistry
• Online Access: http://eprints.um.edu.my/44862/
• Institution: Universiti Malaya

Industrial pollution and its associated activities have significantly increased air pollution levels, thereby posing a major threat to human health and the environment. The respiratory system is particularly affected due to air pollution, with harmful gases causing respiratory illnesses and even sudden death. Numerous regrettable events throughout history have occured due to the release of hazardous gases into the surrounding air. The need of installing effective gas sensors to sense the range of ignitable, toxic, and hazardous gases present in the atmosphere has been highlighted by the numerous gas tragedies that occur globally, including leaks from gas, chemicals, and smoke due to external sources. This review focuses on morphology control, for tailoring the surface properties of gas-sensing materials and to enhance their performance. Bismuth vanadate (BiVO4) has been emerging as a particularly attractive material for gas sensing due to its unique properties, including narrow band gap energy, tunable morphology, and excellent electrical conductivity by controlling the morphology of BiVO4 nanomaterials. Different synthesis methods used to prepare BiVO4 nanostructures with diverse morphologies, such as nanorods, nanoparticles, hierarchical structures, bulky, fusiform, clavate, and flower-patterned were used to examine the morphological effects for gas sensing characteristics. © 2023 Elsevier B.V.