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Online since: October 2011
Authors: Bing Hua Yao, Jia Wei, Jin Fen Niu
Photodegradation of Dyeing Wastewater by
High Photocatalytic Activity TiO2 under UV and Visible-light Irradiation
Jinfen Niu 1, a , Binghua Yao 2, b , Jia Wei 3, c
1,2,3Department of Applied Chemistry, Xi’an University of Technology, Xi'an 710054,China
aemail:niujinfen@xaut.edu.cn bemail:bhyao@xaut.edu.cn cemail:huaxue99@126.com
Keywords: TiO2, dyeing wastewater, photodegradation
Abstract.
X-ray diffraction and TEM were employed to characterize the morphology, structure of the photocatalysts.
On the contrary, some new but lower diffraction peaks were found in the TiO2(800) sample, it implied the crystal transfer, it was more appropriate to ascribe its crystal structures to anatase and rutile mixed phase.The TiO2(900) sample has transferred into rutile phase totally.
X-ray diffraction and TEM were employed to characterize the morphology, structure of the photocatalysts.
On the contrary, some new but lower diffraction peaks were found in the TiO2(800) sample, it implied the crystal transfer, it was more appropriate to ascribe its crystal structures to anatase and rutile mixed phase.The TiO2(900) sample has transferred into rutile phase totally.
Online since: February 2012
Authors: Xin Fu
High-temperature CO2 capture using MgO/γ-Al2O3 materials as adsorbent
Xin Fu1,a
1 College of Chemistry and Life Science, Weinan Teachers University, Weinan 714000, PR China
a fuxin0117@163.com
Keywords: CO2 adsorbent; MgO/Al2O3; high thermal stability
Abstract: CO2 adsorbent, MgO/γ-Al2O3, was prepared by impregnation methods.
The structure and surface properties of the prepared materials were characterized by XRD, N2 adsorption-desorption, in situ FIIR and CO2-TPD techniques.
The surface area, pore volume, and average pore diameter ofγ-Al2O3 were 253 m2/g, 0.57 ml/g, and 9.09 nm, respectively and the pore volume and average pore size decreased steadily with increased MgO loading, which demonstrated the effect of the MgO loading on the pore structure of the Al2O3.
The structure and surface properties of the prepared materials were characterized by XRD, N2 adsorption-desorption, in situ FIIR and CO2-TPD techniques.
The surface area, pore volume, and average pore diameter ofγ-Al2O3 were 253 m2/g, 0.57 ml/g, and 9.09 nm, respectively and the pore volume and average pore size decreased steadily with increased MgO loading, which demonstrated the effect of the MgO loading on the pore structure of the Al2O3.
Online since: December 2011
Authors: Rajiv Shekhar, Vinod Kumar, Kantesh Balani, R. Balasubramaniam
Phase analysis of LAT971 revealed the presence of dual phase structure namely Mg-rich α- and Li-rich β-phase.
After hot rolling, it was observed that dynamic recrystallization led to refinement of the α-phase grain structure.
It comprised dual phase structure of light grey dendrite, α-phase and dark grey matrix as β-phase.
Figure 1: Typical SEM micrographs showing dual phase structure in (a) LAT971C, (b) LAT971R, and (c) XRD of LAT971C and LAT971R.
Huang, Materials Chemistry and Physics, 81 (2003) 11-26
After hot rolling, it was observed that dynamic recrystallization led to refinement of the α-phase grain structure.
It comprised dual phase structure of light grey dendrite, α-phase and dark grey matrix as β-phase.
Figure 1: Typical SEM micrographs showing dual phase structure in (a) LAT971C, (b) LAT971R, and (c) XRD of LAT971C and LAT971R.
Huang, Materials Chemistry and Physics, 81 (2003) 11-26
Online since: January 2004
Authors: V.M. Nadutov, V.M. Garamus, R. Willumeit, Ye.O. Svystunov
Mössbauer measurement was carried out to indicate magnetic structure.
Fe-Ni alloys are based on analysis of atomic order and magnetic structure.
Alloying with carbon is an effective factor to control the magnetic structure and properties of invar.
This means that there are inhomogeneities with noncompact structure in the alloy.
Avnir (Ed.), The fractal approach to Heterogeneous Chemistry (Wiley, New York 1989), p.67 [13] M.
Fe-Ni alloys are based on analysis of atomic order and magnetic structure.
Alloying with carbon is an effective factor to control the magnetic structure and properties of invar.
This means that there are inhomogeneities with noncompact structure in the alloy.
Avnir (Ed.), The fractal approach to Heterogeneous Chemistry (Wiley, New York 1989), p.67 [13] M.
Online since: October 2012
Authors: Hai Yun Jiang, Wei Li Zhang, Ji Gang Wang, Shen Qing Wu
X-ray diffraction (XRD) was also used to characterize the structure of microcrystalline.
The broad peak at about 20° in the spectrum of PF resin pyrolyzed at 600 °C means that the sample has a part symbol of polymeric structure.
Therefore, the structure of the char derived from PF resin has a direct relationship with the electrical resistivity.
However, it has still a positive effect on the structure rearrangement of the char.
Tascón: Journal of Materials Chemistry Vol.8 (1998) p.2875 [10] I.
The broad peak at about 20° in the spectrum of PF resin pyrolyzed at 600 °C means that the sample has a part symbol of polymeric structure.
Therefore, the structure of the char derived from PF resin has a direct relationship with the electrical resistivity.
However, it has still a positive effect on the structure rearrangement of the char.
Tascón: Journal of Materials Chemistry Vol.8 (1998) p.2875 [10] I.
Online since: August 2013
Authors: Yi Xiang Yuan, Peng Fu Xie, Wen Yu Cao, Cong Chen, Chao Yu, De Jun Zhan, Chun Qing Tan
Introduction
Device structure has an important effect on flow field [1-2].
For the traditional combustor with typical single vortex flow field structure, the flow separation recirculation can be easily formed at the corner of the intersection between the combustor dome and liner.
Fig.1 Schematic diagram of flow field Fig.2 Structures of the device for test The structures of test devices A and B In order to split the flow, the structure of combustion stability device A (multi vortexes-dome combustor model) is shown in Fig. 2.
The device B shown in Table 1 is the structure model of the single vortex dome combustor, which is used as the structure comparison with the device A.
References [1] Hailin Fan, Yixiang Yuan, Chunqing Tan, et al: Gas Turbine Technology Vol. 04 (2011), p. 35(in Chinese) [2] Gang Dong, Ying Huang, Yiliang Chen: Journal of Fuel Chemistry and Technology Vol. 28 (2000), p. 49(In Chinese) [3] Yixiang Yuan, Yuzhen Lin, Gaoen Liu: Journal of Aerospace Power Vol. 19 (2004), p. 332(in Chinese)
For the traditional combustor with typical single vortex flow field structure, the flow separation recirculation can be easily formed at the corner of the intersection between the combustor dome and liner.
Fig.1 Schematic diagram of flow field Fig.2 Structures of the device for test The structures of test devices A and B In order to split the flow, the structure of combustion stability device A (multi vortexes-dome combustor model) is shown in Fig. 2.
The device B shown in Table 1 is the structure model of the single vortex dome combustor, which is used as the structure comparison with the device A.
References [1] Hailin Fan, Yixiang Yuan, Chunqing Tan, et al: Gas Turbine Technology Vol. 04 (2011), p. 35(in Chinese) [2] Gang Dong, Ying Huang, Yiliang Chen: Journal of Fuel Chemistry and Technology Vol. 28 (2000), p. 49(In Chinese) [3] Yixiang Yuan, Yuzhen Lin, Gaoen Liu: Journal of Aerospace Power Vol. 19 (2004), p. 332(in Chinese)
Online since: August 2009
Authors: Ji Dong Hu, Tong Zhao, Wei Jian Han, Li Ye, Zhi Hong Ji
Functional Silica Aerogels with High Specific Surface Area: Influence of
Preparation Conditions on Structure Properties
Li Ye1, 2, a, Weijian Han1, 2, b
, Zhihong Ji1, 2, c, Jidong Hu1,d
, Tong Zhao
1, e
1
Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry,
Chinese Academy of Science, Beijing 100190, People's Republic of China
2
Graduate University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
a
yeli@iccas.ac.cn, bhanweijian@iccas.ac.cn, czhji@iccas.ac.cn, dhujidong@iccas.ac.cn,
d
tzhao@iccas.ac.cn
Keywords: amino-substituted silica aerogels, pore morphology, uniform pore distribution
Abstract.
DMF, which is known as a drying control chemical additive (DCCA), can affect the structure and drying behavior of the gel network.
Structure changes were investigated by varying x from 0.1 to 0.3 and y from 0 to 0.004, and the resulting aerogels were identified as SiO2-100x-1000y.
Pore structure.
The pore structures of the amino-substituted silica aerogels were characterized by N2 adsorption-desorption isotherms, as shown in Fig. 1.
DMF, which is known as a drying control chemical additive (DCCA), can affect the structure and drying behavior of the gel network.
Structure changes were investigated by varying x from 0.1 to 0.3 and y from 0 to 0.004, and the resulting aerogels were identified as SiO2-100x-1000y.
Pore structure.
The pore structures of the amino-substituted silica aerogels were characterized by N2 adsorption-desorption isotherms, as shown in Fig. 1.
Online since: March 2013
Authors: Hong Bing Yu, Yang Yang, Xi Chao Gao, Shan Shan Yang, Guang Yuan Ren, Jing Jing, Yi Li, Si Hui Zhan
China;
2Department of Chemistry, Tianjin University, Tianjin 300072, P.
C. 113 (2009) 13317-13324. 525 prepared C-doping TiO2 hollow microspheres with mesoporous structure by a simple two-step template method.
The Journal of Physical Chemistry C 2009, 113, (30), 13317-13324.)
Miyata, Structure and acidity of vanadium oxide layered on titania (anatase and rutile), J.
Journal of Materials Chemistry 2008, 18, (20), 2379-2385.)
C. 113 (2009) 13317-13324. 525 prepared C-doping TiO2 hollow microspheres with mesoporous structure by a simple two-step template method.
The Journal of Physical Chemistry C 2009, 113, (30), 13317-13324.)
Miyata, Structure and acidity of vanadium oxide layered on titania (anatase and rutile), J.
Journal of Materials Chemistry 2008, 18, (20), 2379-2385.)
Online since: November 2025
Authors: Iuliana Duma, Raluca Faur, Mihai Florea, Andrei Christian Bucur
Scanning Electron Microscopes (SEMs) operate similarly to optical microscopes, but instead of using light, they employ a focused beam of electrons to "image" specimens and gather information about their structure and composition.[1] The unaided human eye can distinguish two points that are 0.2 mm apart, a measure known as resolving power or resolution.
SEMs can achieve much higher magnifications and greater resolving power, enabling them to observe much smaller structures at subcellular, molecular, and atomic levels.
Materials chemistry and physics, 81(2-3), 345-348
Analytical and bioanalytical chemistry, 379, 640-645
The Journal of Physical Chemistry B, 109(11), 4977-4988
SEMs can achieve much higher magnifications and greater resolving power, enabling them to observe much smaller structures at subcellular, molecular, and atomic levels.
Materials chemistry and physics, 81(2-3), 345-348
Analytical and bioanalytical chemistry, 379, 640-645
The Journal of Physical Chemistry B, 109(11), 4977-4988
Online since: February 2023
Authors: Chin Hua Chia, Noor Azlina Masdor, Rafidah Abd Rahman
However, cell wall structure alone does not fully explain the antimicrobial potential of a nanomaterial.
Arabian Journal of Chemistry 12(7) (2021) 908-931
Sustainable Chemistry and Pharmacy 10 (2018) 9–15
Frontiers in Chemistry 8 (2020) 571790
Poplawsky, Chemical structure, biological roles, biosynthesis and regulation of yellow xanthomonadin pigments in the phytopathogenic genus Xanthomonas.
Arabian Journal of Chemistry 12(7) (2021) 908-931
Sustainable Chemistry and Pharmacy 10 (2018) 9–15
Frontiers in Chemistry 8 (2020) 571790
Poplawsky, Chemical structure, biological roles, biosynthesis and regulation of yellow xanthomonadin pigments in the phytopathogenic genus Xanthomonas.