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Sunday, 10 October 2010
Dedicated to David Suzuki, and THRC's Green Technical Textile Knowledge Network Initiative.
Nature has nurtured our environment with abundance of resources and green energy. Can we harvest, harness and sustain these free energy to foster innovative solutions to clean our environment? Yes, we can. How? Imagine a green engineering solution to clean air-pollution to foster a sustainable clean environment. Imagine a truly textile substrate, integrated with green nanomaterial, keeps cleaning air and environment to provide us comfort and quality lifestyle that we envision.
Plant's chlorophyll, a typical natural photocatalyst, captures sunlight to turn water (H2O) and carbon dioxide (CO2) into oxygen (O2) and glucose. On the contrary in the presence of light and water, photocatalyst nTiO2, creates strong oxidation agent and electronic holes to breakdown the organic matter to CO2 and H2O as shown in figure..
Disinfections by nTiO2 is x3 stronger than Cl2 & x1.5 stronger than O3
Wavelength of light required for Photo-excitation ʎ =Planck’s Constant, h:1240/Band Gap Energy: 3.2eV = 388nm
Research reveals that bacteria, molds and mites inside carpets and air conditioners can be airborne - dust particles, paints, varnishes and pressed wood products used in interior decoration, form formaldehyde, benzene and other hazardous and carcinogenic chemicals as well as matters produced in human metabolism and ammonia inside toilets have made the indoor air severely polluted than the outdoor air.
Usually people spend about 80-90% of their time indoors. They are exposed to polluted indoor air that may cause headaches, dizziness, irritation, fatigue and even lung cancer and other malignancies. Scientists have been modifying materials and offering creative solutions to these challenging problems.
TiO2 Crystal Structures:
Toxic VOC + Light + H2O + TiO2 = Non-Toxic Inorganic Gas + TiO2
|সর্বশেষ আপডেট ( Wednesday, 08 February 2012 )|
Green Engineering: Self-Cleaning NanoTechnology: http://biggani.com/content/view/1431/178/