Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 2
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Graphitic carbon nitride (g-C3N4) is an attractive photocatalyst, however, its practical photocatalytic applications are still faced with huge challenges. The aim of this research is to identify the correlation between synthetic conditions and properties of the g-C3N4 and derive an optimum synthesis condition for improving photocatalytic activities of the g-C3N4. In this study, novel and versatile g-C3N4 nanosheets were synthesized by the simple thermal pyrolysis of urea. In the synthesis process, the pyrolysis temperature and the heating rate, which can have the most significant influence on the structures and properties of g-C3N4, were set as variables, and the effects were systematically investigated. When synthesized at a relatively high temperature, the amount of material being synthesized is reduced, however it has been found to represent optical properties suitable for highly efficient photocatalyst by the increase in the thickness and defects formed in the g-C3N4 nanosheets. The photocatalytic degradation experiment of MB dyes indicated that the highest degradation of 95.2% after the reaction for 120 min was achieved on the g-C3N4 nanosheets synthesized at 650oC.

Go to article

Authors and Affiliations

Jeong Hyun Kim
ORCID: ORCID
Myeongjun Ji
ORCID: ORCID
Cheol-Hui Ryu
Young-In Lee
ORCID: ORCID
Download PDF Download RIS Download Bibtex

Abstract

An optimum route to synthesis the W-based composite powders with homogeneous dispersion of oxide nanoparticles was investigated. The La2O3 dispersed W powder was synthesized by ultrasonic spray pyrolysis using ammonium metatungstate hydrate and lanthanum nitrate. The dispersion of Y2O3 nanoparticles in W- La2O3 powder was carried out by a polymer addition solution method using yttrium nitrate. XPS and TEM analyses for the composite powder showed that the nano-sized La2O3 and Y2O3 particles were well distributed in W powder. This study suggests that the combination processing of ultrasonic spray pyrolysis and polymeric additive solution is a promising way to synthesis W-based composite powders.
Go to article

Authors and Affiliations

Youn Ji Heo
1 2
ORCID: ORCID
Eui Seon Lee
1
ORCID: ORCID
Jeong Hyun Kim
1
ORCID: ORCID
Young-In Lee
1 2
ORCID: ORCID
Young-Keun Jeong
3
ORCID: ORCID
Sung-Tag Oh
1 2
ORCID: ORCID

  1. Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
  2. Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
  3. Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea

This page uses 'cookies'. Learn more