Definition Of Nanoparticles Research Articles

Review Article Revolution of Nanotechnology in Air Pollution

AbstractImportance of the field: Environmental contamination is one of the important issues that the world is confronting today, and it is expanding with each passing year and leading to grave and harmful effect to the earth. At present, the air contains various pollutants like CO, chlorofluorocarbons, volatile organic compounds, hydrocarbons, and nitrogen oxides. Water and soil are also contaminated with organic and inorganic compounds; the major sources for water and soil contamination are sewage water, industrial effluents, and random use of pesticides, fertilizers, and oil spills. In parallel, the rapid growth of nanotechnology has gained a great deal of interest in the applications of nanomaterial’s potential in improved systems for monitoring and cleanup including all the three phases of environment . It can develop the pollutants sensing and detection and help in the improvement of novel remediation technologies.Areas covered in this review: In this review, we discuss the recent progress towards the use of nanotechnology in a variety of above-mentioned applications. Furthermore, we expand upon the current progress in nanomaterial engineering approaches describing several recent examples that are utilized to enhance stability, catalytic efficiency, and utilization of alternate oxidants.What the reader will gain: The review will provide a comprehensive knowledge in the definition of nanoparticles, and the nanotechnology concept, design of nanomaterial for potentially practical purposes. Finally, we provide a prospective on the future aspects of nanotechnology and its applications in air pollution remediation.Take home message: Because of its wide applications, academic researchers, environmental scientists, and health care providers are expected to gain current knowledge and future prospects of the practical use of nanomaterial in environmental fields.

Nanotechnology: Future of Environmental Air Pollution Control

Environmental contamination is one of the important issues that the world is confronting today, and it is expanding with each passing year and leading to grave and harmful effect to the earth. At present, the air contains various pollutants like CO, chlorofluorocarbons, volatile organic compounds, hydrocarbons, and nitrogen oxides. Water and soil are also contaminated with organic and inorganic compounds, the major sources for water and soil contamination are sewage water, industrial effluents, random use of pesticides, fertilizers, and oil spills. In parallel, the rapid growth of nanotechnology has gained a great deal of interest in the applications of nanomaterials potential in improved systems for monitoring and cleanup including all the three phases of environment . It can develop the pollutants sensing and detection and help in the improvement of novel remediation technologies. Nanomaterials are excellent adsorbents, catalysts and sensors due to their large specific surface areas and high reactivates. This review firstly sheds the light on the definition of nanoparticles, and the nanotechnology concept, the fundamental properties, classification, and fields of nanotechnology applications. Then it focuses broadly on the application of nanotechnology in environmental fields, in particular, its application in air pollution monitoring and remediation and its future trend in this field.

Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective

The regulation of engineered nanoparticles requires a widely agreed definition of such particles. Nanoparticles are routinely defined as particles with sizes between about 1 and 100 nm that show properties that are not found in bulk samples of the same material. Here we argue that evidence for novel size-dependent properties alone, rather than particle size, should be the primary criterion in any definition of nanoparticles when making decisions about their regulation for environmental, health and safety reasons. We review the size-dependent properties of a variety of inorganic nanoparticles and find that particles larger than about 30 nm do not in general show properties that would require regulatory scrutiny beyond that required for their bulk counterparts.