Dr Qin Li Associate Professor in the Environmental Engineering & Queensland Micro- and Nanotechnology Centre, says real life application of this would be high efficiency paintable solar cells and water purification using sun light.
Wherever there is abundant sun we can brush on this nanomaterial to harvest solar energy to create clean water she says.
This mechanism can be extremely significant for light harvesting. What’s more important is we’ve come up with an easy way to achieve that, to make a UV absorbing material to become a visible light absorber by narrowing the bandgap.
Visible light makes up 43 per cent of solar energy compared to only 5 per cent emitted by UV light.
Major efforts have been made to improve the potential for titanium oxide, or titania, absorption of visible light or develop visible-light sensitive materials in general.
Methods used for titania, including metal ion doping, carbon doping, nitrogen doping and hydrogenation usually require stringent conditions to obtain the modified TiO2 such as elevated temperature or high pressure.
In their innovative paper published in Chemical Communications, a Royal Society of Chemistry journal, the researchers observed that when TiO2 particles are mixed with graphene quantum dots, the resulting composite absorbs visible light by a quantum-confined bandgap narrowing mechanism.
We were really excited to discover this: when two UV absorbing materials, namely TiO2 and graphene quantum dots, were mixed together, they started to absorb in the visible range, more significantly, the bandgap can be tuned by the size of graphene quantum dots says Dr Li.
_We named the phenomenon ‘quantum-confined bandgap narrowing’ and this mechanism may be applicable to all semiconductors, when they are linked with graphene quantum dots. Flexible tuning of bandgap is extremely desirable in semiconductor-based devices._
- Hookt IncAndroid Developer, 2012 - present
- airGAndroid Developer, 2010 - 2012
- SophosSenior Web Developer, 2006 - 2010
- jCarsCEO, 2004 - 2006
- Automatic Data ProcessingSenior Consultant, 2000 - 2006
- Spectrum Signal ProcessingWeb Developer, 1996 - 2000
- Spectrum Signal ProcessingProduct Manager, 1994 - 1996
- University of VictoriaElectrical Engineering, 1988 - 1994
- Tap My Katamari - Clicker
- Star Wars™ Pinball
- Euro Truck Driver
Moto X 2014: Top Reasons Why It's Better Than Apple's iPhone 6
Android News, Reviews, Hacks, Apps, Tips & Tricks
Men's 2012 hairstyles: latest men's haircuts & men's hai...
A guide to the latest men's hairstyles and haircuts for 2012, including a tutorials, cutting and styling guides.
When your house is burning down, you should brush your teeth - The Oatmeal
Note from the author: Today, January 8th 2013, marks the 20th anniversary of my house burning down, so I decided to write a comic about it.
Voter Registration Video Goes Viral: 'We're In Support Of Romney'
A video uploaded to YouTube on Friday depicting a young woman registering voters in El Paso County, Colorado claiming she works for the cler
What Happens When You Put Four Donuts On A C63 AMG?
For the first episode of DRIVE TV's Chris Harris On Cars show, the English motoring hack swaps out the wide, sticky tires on a Mercedes-Benz