Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Major advance in using sunlight to produce steam without boiling water

Abstract:
Scientists today are describing a revolutionary new way to use sunlight to produce steam and other vapors without heating an entire container of fluid to the boiling point. The advance, reported in the American Chemical Society (ACS) journal ACS Nano, has potential applications, especially in the poverty-stricken areas of the developing world, that include inexpensive, compact devices for purification of drinking water, sterilization of medical instruments and sanitizing sewage.

Major advance in using sunlight to produce steam without boiling water

Washington, DC | Posted on November 19th, 2012

"This research opens up a revolutionary new application of nanoparticles in solar energy," said Paul Weiss, Ph.D., editor-in-chief of ACS Nano, one of more than 40 peer-reviewed scientific journals published by ACS, the world's largest scientific society. "The authors show that sunlight can be used to create steam with virtually no wasteful heating of the surrounding liquid. The potential societal benefits are staggering. They include more energy-efficient distillation of alcohol, a new and highly practical strategy for desalination and water purification and compact solar-driven sources of steam for sterilization and sanitation in resource-poor locations," said Weiss.

Naomi Halas, D.Sc., Peter Nordlander, Ph.D., and colleagues note in the report that metallic nanoparticles (so small that 1,000 would fit across the width of a human hair) absorb large amounts of light, resulting in a dramatic rise in their temperature. They are with Rice University. That ability to generate heat has fostered interest among scientists in using nanoparticles in a range of applications. These include photothermal treatment of certain forms of cancer, laser-induced drug release and nanoparticle-enhanced bioimaging.

Scientists in the past also explored the use of nanoparticles in solar energy applications. However, that research focused mainly on using nanoparticles to improve the ability of fluids to conduct heat. Until now, scientists had not reported on the use of nanoparticles, mixed into fluids, to capture sunlight, heat up and change the fluid into steam or other vapor.

The new report explains that nanoparticles illuminated by light can quickly rise to temperatures above 212 degrees Fahrenheit, the boiling point of water. Steam forms around the surface of each nanoparticle, billons of which can be placed in water or other fluids. Eventually, the vapor escapes from the particle, forming nanobubbles that float to the top of the surface and escape as water vapor or steam, vapors of ethanol in the case of distillation of alcohol for beverages or fuel, or other vapors.

It describes the use of this approach to measure and document solar steam generation in water solutions illuminated by sunlight containing different kinds of nanoparticles. One solution contained silicon dioxide/gold nanoparticles and another contained carbon nanoparticles. The nanoparticles began to produce steam within 5-20 seconds after shining sunlight into the solutions. The gold nanoparticle solution produced steam in small "microexplosive" bursts. The scientists used the gold nanoparticles to distill alcohol from water and got higher yields of alcohol than would have occurred by boiling the solution.

An impressive 82 percent of the sunlight absorbed by the nanoparticles went directly to generating steam. The overall energy efficiency of the steam generation process was 24 percent, and the scientists had made no effort to optimize the process.

"These results clearly indicate that solar steam generation is a process that has significant potential for use in a wide variety of energy- and sustainability-relevant applications," the report states. "Solar-driven, stand-alone waste processing or water purification systems could be developed based on this process. High-temperature (about 240 degrees F. and above) steam produced directly using sunlight could also be used for compact sterilization or sanitation purposes, from the processing of medical waste to the cleaning of medical or dental equipment, minimizing the resource, time and input chemical requirements demanded by current methods. With further development, this approach may be adaptable to higher pressures and other working fluids to drive turbines in solar energy harvesting applications. This approach may also be modified to harvest radiant energy from sources other than the sun, for instance, for the capture of waste energy from geothermal, residential or biological sources."

The authors acknowledge funding from the Robert A. Welch Foundation and the Bill and Melinda Gates Foundation.

####

About American Chemical Society (ACS)
The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With more than 164,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

To automatically receive news releases from the American Chemical Society, contact .

Follow us: Twitter | Facebook

For more information, please click here

Contacts:
Michael Bernstein

202-872-6042

Copyright © American Chemical Society (ACS)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

GraphExeter illuminates bright new future for flexible lighting devices June 23rd, 2016

Soft decoupling of organic molecules on metal June 23rd, 2016

Nanomedicine

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

Stealth nanocapsules kill Chagas parasites in mouse models June 22nd, 2016

New nanoparticle technology developed to treat aggressive thyroid cancer: Platform designed to deliver nanotherapy effective in preclinical models of metastatic anaplastic thyroid cancer June 21st, 2016

Discoveries

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

GraphExeter illuminates bright new future for flexible lighting devices June 23rd, 2016

Soft decoupling of organic molecules on metal June 23rd, 2016

Announcements

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

GraphExeter illuminates bright new future for flexible lighting devices June 23rd, 2016

Soft decoupling of organic molecules on metal June 23rd, 2016

Environment

The use of nanoparticles and bioremediation to decontaminate polluted soils June 14th, 2016

UQ research accelerates next-generation ultra-precise sensing technology June 10th, 2016

VentureLab nanotechnology startup wins TechConnect Innovation Award June 2nd, 2016

The next generation of carbon monoxide nanosensors May 26th, 2016

Energy

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

FEI and University of Liverpool Announce QEMSCAN Research Initiative: University of Liverpool will utilize FEIís QEMSCAN technology to gain a better insight into oil and gas reserves & potentially change the approach to evaluating them June 22nd, 2016

Titan shines light on high-temperature superconductor pathway: Simulation demonstrates how superconductivity arises in cuprates' pseudogap phase June 22nd, 2016

New generation of high-efficiency solar thermal absorbers developed June 20th, 2016

Water

Mille-feuille-filter removes viruses from water May 19th, 2016

First single-enzyme method to produce quantum dots revealed: Biological manufacturing process, pioneered by three Lehigh University engineers, produces equivalent quantum dots to those made chemically--but in a much greener, cheaper way May 9th, 2016

Understanding tiny droplets can make for better weather forecasts: Climate change models also benefit from understanding fundamental thermodynamics of water droplets May 6th, 2016

Engineers create a better way to boil water -- with industrial, electronics applications May 5th, 2016

Alliances/Trade associations/Partnerships/Distributorships

FEI and University of Liverpool Announce QEMSCAN Research Initiative: University of Liverpool will utilize FEIís QEMSCAN technology to gain a better insight into oil and gas reserves & potentially change the approach to evaluating them June 22nd, 2016

French Research Team Helps Extend MRI Detection of Diseases & Lower Health-Care Costs: CEA, INSERM and G2ELab Brings Grenoble Regionís Expertise In Advanced Medicine & Magnetism Applications to H2020 IDentIFY Project June 21st, 2016

Research showing why hierarchy exists will aid the development of artificial intelligence June 13th, 2016

UK NANOSAFETY GROUP publishes 2nd Edition of guidance to support safe working with nanomaterials May 30th, 2016

Solar/Photovoltaic

New generation of high-efficiency solar thermal absorbers developed June 20th, 2016

Novel capping strategy improves stability of perovskite nanocrystals: Study addresses instability issues with organometal-halide perovskites, a promising class of materials for solar cells, LEDs, and other applications June 13th, 2016

Perovskite solar cells surpass 20 percent efficiency: EPFL researchers are pushing the limits of perovskite solar cell performance by exploring the best way to grow these crystals June 13th, 2016

A type of nanostructure increases the efficiency of electricity-producing photovoltaic June 10th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic