Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Zinc stannate nanostructures: growing a highly useful semiconductor

Figure 1: Scanning electron microscope images of ZTO microstructures: (a) low
magnification image of the Zn2SnO4 octahedrons; (b) ZnSn(OH)6 cubes formed in the initial
stage of the reaction (note secondary nucleation on the cube surfaces); (c) a Zn2SnO4 octahedron;
(d) coalescing nanoplates. (Reproduced with permission, © 2010 Elsevier B.V.)
Figure 1: Scanning electron microscope images of ZTO microstructures: (a) low magnification image of the Zn2SnO4 octahedrons; (b) ZnSn(OH)6 cubes formed in the initial stage of the reaction (note secondary nucleation on the cube surfaces); (c) a Zn2SnO4 octahedron; (d) coalescing nanoplates. (Reproduced with permission, © 2010 Elsevier B.V.)

Abstract:
This timely review focuses on the synthesis of zinc stannate (zinc tin oxide: ZTO) nanostructures by the hydrothermal method, as well as the physical properties and applications of different zinc stannate nanostructures in solar cells, gas sensors, and photocatalysts.

Zinc stannate nanostructures: growing a highly useful semiconductor

Tsukuba, Japan | Posted on March 24th, 2011

The review is published in March 2011 in the journal Science and Technology of Advanced MaterialsVol. 12(2011) p. 013004. Itis presented by Sunandan Baruah and Joydeep Dutta from the Asian Institute of Technology, Klong Luang, Thailand.

Binary semiconducting oxide nanostructures, such as zinc oxide and titanium oxide, are widely used in sensors and catalysts. However, ternary semiconducting oxide nanostructures, which show higher electrical conductivity and are more stable than the binary type, are increasingly in demand for specific applications due to their particular physical properties. In contrast to conventional ‘top-down' processes involving physically breaking large macroscopic materials into nanoparticles, the chemically based ‘self-organization' approach offers an inexpensive and flexible means of precisely controlling the size, crystal structure and optoelectronic properties of semiconducting oxide nanostructures, which is crucial for the use of ZTO in specific applications.

ZTO nanostructures can be produced using a variety of methods including thermal evaporation, high-temperature calcination, mechanical grinding, sol-gel synthesis, hydrothermal reaction, and ion-exchange reaction. Different methods produce different ratios of ZTO oxides and impurities, expressed in alternative crystal structures. The authors describe the pertinent features of the hydrothermal growth method for synthesizing ZTO, including high purity of the stable zinc orthostannate Zn2SnO4 and the accompanying ‘cubic spinel' crystal structure. Moreover, hydrothermal growth is an attractive and relatively simple method since crystal growth occurs at mild temperatures in water.

Typical hydrothermal growth of ZTO nanostructures consists of using an aqueous mixture of a zinc salt, such as zinc nitrate or zinc chloride, and stannic chloride. This mixture is then reduced at 200-250 °C in sodium hydroxide or ammonium hydroxide in a high-pressure environment. Various methods for hydrothermal growth of ZTO nanostructures are detailed by the authors, with varying end products in terms of crystal structure and ‘phase composition' - amounts of the particular oxides produced.

The physical properties of ZTO depend on the method used for their synthesis. ZTO is a ‘wide-gap' semiconductor with a bandgap of around 3.6 eV, but the precise bandgap energy depends on the conditions of synthesis, which might result in quantum confinement effects arising from the small size of the nanostructures. Controlling the photoelectrochemical properties of ZTO has practical importance, and relating the optical and electronic properties of ZTO with the composition and crystal structure can pave the way for applications of other complex oxides.

The authors describe industrial applications arising from the photoelectrochemical properties of ZTO. Firstly, as a photocatalyst ZTO can be used for degrading harmful pesticides from ground water; secondly the porous nanostructures are ideal for gas sensing as they offer high surface to volume ratios; and thirdly ZTO has potential in the field of dye-sensitized solar cells, an economically plausible alternative to conventional solar cells. Given that only a few morphologies have been reported, the authors conjecture that within the next decade ZTO nanostructures will find uses in further industrial applications.

This review contains 131 references and 22 figures and provides an invaluable source of up-to-date information for newcomers and experts in this exciting area of research.

####

Contacts:
National Institute for Materials Science
Tsukuba, Japan
Email:
Tel. +81-(0)29-859-2494

Copyright © National Institute for Materials Science

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 Links

[1] Sunandan Baruah and Joydeep Dutta, Zinc stannate nanostructures: hydrothermal synthesis, Sci. Technol. Adv. Mater.12 (2011) 013004

[2] Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand

Related News Press

News and information

Rutgers, NIST physicists report technology with potential for sub-micron optical switches March 31st, 2015

Prototype 'nanoneedles' generate new blood vessels in mice: Scientists have developed tiny 'nanoneedles' that have successfully prompted parts of the body to generate new blood vessels, in a trial in mice March 31st, 2015

Super sensitive measurement of magnetic fields March 31st, 2015

Nanomedicine pioneer Mauro Ferrari at ETH Zurich March 31st, 2015

Chip Technology

Rutgers, NIST physicists report technology with potential for sub-micron optical switches March 31st, 2015

Next important step toward quantum computer: Scientists at the University of Bonn have succeeded in linking 2 different quantum systems March 30th, 2015

State-of-the-art online system unveiled to pinpoint metrology software accuracy March 27th, 2015

SUNY POLY CNSE to Host First Ever Northeast Semi Supply Conference (NESCO) Conference Will Connect New and Emerging Innovators in the Northeastern US and Canada with Industry Leaders and Strategic Investors to Discuss Future Growth Opportunities in NYS March 25th, 2015

Sensors

From tobacco to cyberwood March 31st, 2015

UW scientists build a nanolaser using a single atomic sheet March 24th, 2015

Iranian Researchers Present Model to Determine Dynamic Behavior of Nanostructures March 24th, 2015

Nanodevice Invented in Iran to Detect Hydrogen Sulfide in Oil, Gas Industry March 20th, 2015

Announcements

Rutgers, NIST physicists report technology with potential for sub-micron optical switches March 31st, 2015

Prototype 'nanoneedles' generate new blood vessels in mice: Scientists have developed tiny 'nanoneedles' that have successfully prompted parts of the body to generate new blood vessels, in a trial in mice March 31st, 2015

Super sensitive measurement of magnetic fields March 31st, 2015

Nanomedicine pioneer Mauro Ferrari at ETH Zurich March 31st, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Prototype 'nanoneedles' generate new blood vessels in mice: Scientists have developed tiny 'nanoneedles' that have successfully prompted parts of the body to generate new blood vessels, in a trial in mice March 31st, 2015

Super sensitive measurement of magnetic fields March 31st, 2015

From tobacco to cyberwood March 31st, 2015

Next important step toward quantum computer: Scientists at the University of Bonn have succeeded in linking 2 different quantum systems March 30th, 2015

Energy

Wrapping carbon nanotubes in polymers enhances their performance: Scientists at Japan's Kyushu University say polymer-wrapped carbon nanotubes hold much promise in biotechnology and energy applications March 30th, 2015

Solving molybdenum disulfide's 'thin' problem: Research team increases material's light emission by twelve times March 29th, 2015

SUNY Poly & M+W Make Major Announcement: Major Expansion To Include M+W Owned Gehrlicher Solar America Corporation That Will Create up to 400 Jobs to Develop Solar Power Plants at SUNY Poly Sites Across New York State March 26th, 2015

Hong Kong Investors Bullish on Dais Analytic Invest $5.75M, Provide $60M Contract, and Create New Joint Venture Company March 26th, 2015

Solar/Photovoltaic

Wrapping carbon nanotubes in polymers enhances their performance: Scientists at Japan's Kyushu University say polymer-wrapped carbon nanotubes hold much promise in biotechnology and energy applications March 30th, 2015

Solving molybdenum disulfide's 'thin' problem: Research team increases material's light emission by twelve times March 29th, 2015

LAMDAMAP 2015 hosted by the University March 26th, 2015

SUNY Poly & M+W Make Major Announcement: Major Expansion To Include M+W Owned Gehrlicher Solar America Corporation That Will Create up to 400 Jobs to Develop Solar Power Plants at SUNY Poly Sites Across New York State March 26th, 2015

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







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE