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Online since: September 2013
Authors: Nantakan Muensit, Sumetha Suwanboon, Pongsaton Amornpitoksuk, Jonas Baltrusaitis
Enhanced Photocatalytic Activities of Ag/ZnO Powders
Modified by Diblock Copolymer
Pongsaton Amornpitoksuk1,4,a, Sumetha Suwanboon2,4,b
Nantakan Muensit3,4,c and Jonas Baltrusaitis5,d
1Department of Chemistry, Faculty of Science, Prince of Songkla University,
Hat-Yai, Songkhla, 90112, Thailand
2Department of Materials Science and Technology, Faculty of Science,
Prince of Songkla University, Hat-Yai, Songkhla, 90112, Thailand
3Department of Physics, Faculty of Science, Prince of Songkla University,
Hat-Yai, Songkhla, 90112, Thailand
4Center of Excellence in Nanotechnology for Energy (CENE), Prince of Songkla University,
Hat-Yai, Songkhla, 90112, Thailand
4PhotoCatalytic Synthesis Group, University of Twente, Meander 229, P.O.Box 217,
7500 AE Enschede, The Netherlands
aampongsa@yahoo.com, bssuwanboon@yahoo.com, cnantakan.m@psu.ac.th,
dj.baltrusaitis@utwente.nl
Keywords: ZnO, Photocatalyst, Diblock copolymer.
The ZnO powders containing Ag loadings between 1 and 9 mol%, clearly showed two different characteristic diffraction patterns of the ZnO crystals in a wurtzite structure (JCPDS card number 36-1451) and a cubic structure of metallic Ag (JCPDS card number 87-0718).
With an increase of the Ag+ ions in the starting solution, the branching rod’s dimension decreased and tended to form a pallet-like structure.
The ZnO powders containing Ag loadings between 1 and 9 mol%, clearly showed two different characteristic diffraction patterns of the ZnO crystals in a wurtzite structure (JCPDS card number 36-1451) and a cubic structure of metallic Ag (JCPDS card number 87-0718).
With an increase of the Ag+ ions in the starting solution, the branching rod’s dimension decreased and tended to form a pallet-like structure.
Online since: March 2010
Authors: Jiang Tao Li, Ying Chun Shan, Yong Ge Cao, Jiu Jun Xu
Large Scale Translucent Y-α-sialon Ceramics Prepared by
Two-steps Hot Pressing
Xu Jiujun1, a, Shan Yingchun1, b, Li Jiangtao2 and Cao Yongge3
1 Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
2
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China
3
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou
350002, China
a
jjxu@dlmu.edu.cn, bshanychun@126.com
Keywords: α-sialon; Two-steps hot pressing; Optical property
Abstract.
Introduction Sialon have many excellent properties, such as mechanical, thermal, chemical properties as well as better optical property. α-sialon (Mm/3Si12-(m+n)Alm+nOnN16-n, where M, the stabilizer of α-sialon structure, is the cations such as Ca, Mg, Y and rare-earth elements) and β-sialon (Si6-zAlzOzN8-z) are the two phase of sialon.
In addition, a stabilizer can be incorporate into α-sialon structure, together with the substitution of aluminum and oxygen for part of the silicon and nitrogen, resulting in ceramics with reduced amounts of residual glassy phase [4].
Introduction Sialon have many excellent properties, such as mechanical, thermal, chemical properties as well as better optical property. α-sialon (Mm/3Si12-(m+n)Alm+nOnN16-n, where M, the stabilizer of α-sialon structure, is the cations such as Ca, Mg, Y and rare-earth elements) and β-sialon (Si6-zAlzOzN8-z) are the two phase of sialon.
In addition, a stabilizer can be incorporate into α-sialon structure, together with the substitution of aluminum and oxygen for part of the silicon and nitrogen, resulting in ceramics with reduced amounts of residual glassy phase [4].
Online since: June 2007
Authors: Jin Heong Yim, Young Kwon Park, Jong Ki Jeon, Ji Man Kim, Hyun Ju Park, Jin Ho Jung
Catalytic Cracking of LLDPE over MCM-48
Jong-Ki Jeon1, Hyun Ju Park2, Jin-Heong Yim
3, Ji Man Kim
4, Jinho Jung5 and
Young-Kwon Park2,a
1
Department of Chemical Engineering, Kongju National University, Gongju, 314-701, Korea
2Faculty of Environmental Engineering, University of Seoul, Seoul 130-743, Korea
3
Division of Advanced Materials Engineering, Kongju National University, Gongju, 314-701, Korea
4Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
5
Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 136-713, Korea
aCorresponding author: catalica@uos.ac.kr
Keywords: LLDPE, catalytic degradation, Al-MCM-48, catalytic stability
Abstract.
Recent reports on MCM-48 suggest that the cubic structure would be suitable for catalytic reactions, and three-dimensional interwoven structure would resist pore blockage [2].
This is mainly due to the fact that the three-dimensional pore structures of Al-MCM-48 may resist generating cokes.
Recent reports on MCM-48 suggest that the cubic structure would be suitable for catalytic reactions, and three-dimensional interwoven structure would resist pore blockage [2].
This is mainly due to the fact that the three-dimensional pore structures of Al-MCM-48 may resist generating cokes.
Online since: April 2014
Authors: Chen Liu, Dong Li, Guo Hui Chen, Xiang Hui Lu, Jun Tian
Analysis on the Bonding Property of the Propellant and Liner
Guohui Chen1,a, Jun Tian1,b,Chen Liu1,c, Dong Li1,d, Xianghui Lu1,e
1 Xi’an Modern chemistry Research Institute, xi’an710065, China
aborder_chen@126.com,btianjun0431@163.com,ccrazy@mail.ustc.edu.cn,
dbrave0214@126.com,e63702372@qq.com
Keywords: processing agent, filler, liner, bonding strength
Abstract: The properties of interface and bonding between the liner and propellant were systematically studied with regard to MAPO content, filler and plasticizer types, and vulcanized agent.
As a mater of fact, the molecular sieve was the best filler to improve bonding strength of propellant and liner system, because molecular sieve has condensed structure of sillico aluminate, SiO4 tetrahedron and AlO4 tetrahedron which consist of three-dimensional network structure by sharing oxygen and it has regular crystal structure, open the adjustable macroscopic system, large specific surface area, and the crystal with larger coulomb and polarity.
As a mater of fact, the molecular sieve was the best filler to improve bonding strength of propellant and liner system, because molecular sieve has condensed structure of sillico aluminate, SiO4 tetrahedron and AlO4 tetrahedron which consist of three-dimensional network structure by sharing oxygen and it has regular crystal structure, open the adjustable macroscopic system, large specific surface area, and the crystal with larger coulomb and polarity.
Online since: December 2012
Authors: Xian Hua Chen, Jie Li, Bo Zhong
Theory of the Removal Function
The process of bonnet tool polishing, which is not just the mechanical cutting and chemistry, molecules have been moving on the being polished surface as well.
Bonnet and component contact problem is complex and affected by multiple factors, such as the bonnet radius, structure, material properties, and the precession angle.
ANSYS can achieve nonlinear analysis of the structure, and calculate the high precision results.
Due to the symmetrical relationship of the structure, only 1/2 of the model is taking to be analyzed.
Bonnet and component contact problem is complex and affected by multiple factors, such as the bonnet radius, structure, material properties, and the precession angle.
ANSYS can achieve nonlinear analysis of the structure, and calculate the high precision results.
Due to the symmetrical relationship of the structure, only 1/2 of the model is taking to be analyzed.
Online since: January 2014
Authors: Yi Shun Cui, Kang Quan Qiao, Bin Huang
China
2School of Chemistry Pharmaceutical Engineering, Sichuan University
of Sciences & Engineering, Zigong 643000, P.
Results and Discussion The molecular structure of SHMP.
Molecule structure of SHMP is given in Fig. 1.
Fig. 1 Molecule structure of SHMP Weight loss measurements.
Results and Discussion The molecular structure of SHMP.
Molecule structure of SHMP is given in Fig. 1.
Fig. 1 Molecule structure of SHMP Weight loss measurements.
Online since: July 2014
Authors: Sunan Tiptipakorn, Nuanjan Matchariyakul, Noppawat Keungputpong
A Study of the Effect of Starch in Polymer Blends of Carboxymethyl Cellulose and Chitosan
Noppawat Keungputponga, Nuanjan Matchariyakulb
and Sunan Tiptipakornc
Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaengsaen, NakhonPathom 73140, Thailand
anop_13010@hotmail.com, bfaasnjm@ku.ac.th, cfaassntk@ku.ac.th
Keywords: Chitosan, Carboxymethyl cellulose, Glutaraldehyde, Starch, Crosslinking.
It is because the most stable structure or the most crosslinked bonds is the ratio of 3:2.
Summary The stability of structure and thermal properties were increasedby adding GL in polymer blends.
In part II, The stability of structure, thermal and swelling properties were increased and crosslinking was decreased with adding starch.
It is because the most stable structure or the most crosslinked bonds is the ratio of 3:2.
Summary The stability of structure and thermal properties were increasedby adding GL in polymer blends.
In part II, The stability of structure, thermal and swelling properties were increased and crosslinking was decreased with adding starch.
Online since: January 2018
Authors: Jiří Zach, Jitka Hroudová, Martin Sedlmajer
This is very important for the casting of massive structures.
LO1408 “AdMaS UP - Advanced Materials, Structures and Technologies”, supported by Ministry of Education, Youth and Sports under the “National Sustainability Programme I”.
Taylor, Cement chemistry, second ed., London, Thomas Telford Publishing, 1997
Janovska-Renkas, The influence of the chemical structure of polycarboxylic superplasticizers on their effectiveness in cement pastes, Procedia Engineering, Vol. 108, 2015
LO1408 “AdMaS UP - Advanced Materials, Structures and Technologies”, supported by Ministry of Education, Youth and Sports under the “National Sustainability Programme I”.
Taylor, Cement chemistry, second ed., London, Thomas Telford Publishing, 1997
Janovska-Renkas, The influence of the chemical structure of polycarboxylic superplasticizers on their effectiveness in cement pastes, Procedia Engineering, Vol. 108, 2015
Online since: February 2013
Authors: Hua Jian Li, Ming Hui Wang, Wan Jiang
Due to the excellent properties (such as high mechanical properties), the nano-structured ceramic composites have attracted widespread interests and research activities in recent years.
Usually, nano-sized powders are used to prepare nano-structured ceramic composites, but large scale synthesis of nano-sized TiB2 or TiN powders is difficult and expensive.
Li, Influence of modulation periods and modulation ratios on the structure and mechanical properties of nanoscale TiAlN/TiB2 multilayers prepared by IBAD, Vacuum 86 (2012) 949-952
He, Influence of Cu on microstructure and wear resistance of TiC/TiB2/TiN reinforced composite coating fabricated by laser cladding, Materials Chemistry and Physics 133 (2012) 741-745
Usually, nano-sized powders are used to prepare nano-structured ceramic composites, but large scale synthesis of nano-sized TiB2 or TiN powders is difficult and expensive.
Li, Influence of modulation periods and modulation ratios on the structure and mechanical properties of nanoscale TiAlN/TiB2 multilayers prepared by IBAD, Vacuum 86 (2012) 949-952
He, Influence of Cu on microstructure and wear resistance of TiC/TiB2/TiN reinforced composite coating fabricated by laser cladding, Materials Chemistry and Physics 133 (2012) 741-745
Online since: January 2008
Authors: Gang Zhou, Yu Bao Li, Soo Wohn Lee
Preparation of the Nano-hydroxyapatite /Chitosan / Konjac glucomannan
Composite as a Novel Degradable Drug Delivery System
Gang Zhou1,2,3,a , Yubao Li
1,b
, Soo Wohn Lee3,c
1
Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University,
Chengdu 610064, China.
2
College of Chemistry, Sichuan University, Chengdu 610064, China.
3
Department of Materials Engineering, Sun Moon University, Asan, Chungnam, 336-708, Korea
a
ezhougang@hotmail.com, bnic7504@scu.edu.cn, cswlee@sunmoon.ac.kr
Keywords: n-HA/CS/KGM composite, In vitro test, Degradability, Drug delivery
Abstract.
The crystallographic structure of composite powders was determined by X-ray diffraction (XRD) using a Philips X' Pert MPD diffractometer using a Cu Kα-radiation.
Unsoaked composites (shown in Fig.1a) shows a crystalline apatite structure with reflections (002), (211), (112), (202), respectively appeared at 25.9°, 31.9°, 32.4°and 34.1°, comparative with the XRD pattern of HA powder (JCPDS #09-0432).
The size and structure of pores become smaller and denser, which induces the rate of drug release is slower.
The crystallographic structure of composite powders was determined by X-ray diffraction (XRD) using a Philips X' Pert MPD diffractometer using a Cu Kα-radiation.
Unsoaked composites (shown in Fig.1a) shows a crystalline apatite structure with reflections (002), (211), (112), (202), respectively appeared at 25.9°, 31.9°, 32.4°and 34.1°, comparative with the XRD pattern of HA powder (JCPDS #09-0432).
The size and structure of pores become smaller and denser, which induces the rate of drug release is slower.