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Online since: August 2023
Authors: Marwa N. Abbas, Amal K. Shehab, Wisam M. Aluaibi, Samer G. Abdulridha, Ali J. Radhi
The band at around 452 cm−1 can be attributed the structure-insensitive Si–O and/or Al–O bending vibration of the internal tetrahedral aluminosilicate framework.[16] The band at 571 cm−1 is assigned to the double six membered ring external linkage peak of Y zeolites (FAU structure).
Cat.-30 exhibits a comparable BET surface areas (SBET = 798 m2 g−1), indicating the well preservation of intrinsic zeolite structure and presence of mesoporous structures.
A higher yield to mid-distillates was as a result of the improvements in the diffusion to and from catalyst structure.
Industrial & Engineering Chemistry Research, 1998. 37(5): p. 1761-1768.
Industrial & Engineering Chemistry Research, 1988. 27(9): p. 1571-1576.
Cat.-30 exhibits a comparable BET surface areas (SBET = 798 m2 g−1), indicating the well preservation of intrinsic zeolite structure and presence of mesoporous structures.
A higher yield to mid-distillates was as a result of the improvements in the diffusion to and from catalyst structure.
Industrial & Engineering Chemistry Research, 1998. 37(5): p. 1761-1768.
Industrial & Engineering Chemistry Research, 1988. 27(9): p. 1571-1576.
Online since: June 2013
Authors: Yang Hu, Lan Liu, Hai Lin, Wei Hua Dan
The purity of the both chemicals is higher than 99%.The other chemicals were analytical reagents, purchased from local chemistry market and had no further purification before use.
To sum up, the RSD of the hydrogels were mainly decided by the structure which was mainly influenced by the three factors and their interactions.
Certainly, all of these are for trying to gain a better understanding of structure-property relationship.
The better control of the structure will achieve the better physical properties.
The structure and the methods of its controlling will be further studied, and the biological evaluation of the PCH will be executed.
To sum up, the RSD of the hydrogels were mainly decided by the structure which was mainly influenced by the three factors and their interactions.
Certainly, all of these are for trying to gain a better understanding of structure-property relationship.
The better control of the structure will achieve the better physical properties.
The structure and the methods of its controlling will be further studied, and the biological evaluation of the PCH will be executed.
Online since: November 2013
Authors: Vafa Jahangir, Maziyar S. Yaghmaee, Reza Riahifar
Our model provides a powerful tool to analysis melting phenomena of metallic nanotubes/wires at different crystal structures and surface plane orientations for various sizes at nanoscale.
Especially metallic nanowires receive much attention in both industrial and academic fields because of their magic structure and conductance.
As the coordination number of surface atoms is usually less than the bulk atoms, crystallographic structure will determine the density of different planes.
Zhao, Novel structures and properties of Gold nanowires, Phys.
Atkins, Physical Chemistry, sixth ed., (Oxford: University Press), (2001) [11] G.
Especially metallic nanowires receive much attention in both industrial and academic fields because of their magic structure and conductance.
As the coordination number of surface atoms is usually less than the bulk atoms, crystallographic structure will determine the density of different planes.
Zhao, Novel structures and properties of Gold nanowires, Phys.
Atkins, Physical Chemistry, sixth ed., (Oxford: University Press), (2001) [11] G.
Online since: June 2015
Authors: Oleg Babchenko, Vít Jirásek, Marián Vojs, Alexander Kromka, Gabriel Vanko, Tibor Izak
The growth of diamond films was performed using microwave chemical vapour deposition system in different gas mixtures: standard CH4/H2 (at low and high ratio of CH4 to H2) and addition of CO2 to CH4/H2 gas chemistry.
Simultaneously, this approach can be combined with the deposition of a protective layer between the GaN/AlGaN structure and diamond film.
Simultaneously, this approach can be combined with the deposition of a protective layer between the GaN/AlGaN structure and diamond film.
Online since: March 2020
Authors: Zakiyah Ahmad, Ahmad Nazri Dagang, Nurhayati Ishak, Hasiah Salleh, Nurul Huda Kamarulzaman, Siti Nurhaziqah Abd Majid, Salmah Mohd Ghazali, Salisa Abdul Rahman
Besides, the conjugated chlorophyll structure becomes more stable towards environmental factors such as heat, temperature and intensity.
Thus, the functioning group, such as carbonyl or hydroxyl group and structure optimizing of the natural dye including conjugating of dye becomes necessary in order to improve the efficiency [29].
Liu, Improved PEDOT: PSS/c-Si hybrid solar cell using inverted structure and effective passivation, Scientific reports, (2016). 6:35091
Ma, Dye-sensitized solar cells using 20 natural dyes as sensitizers, Journal of Photochemistry and Photobiology A: Chemistry, (2011). 219:188-194
Vijayan, Synthesis and properties of polypyrrole obtained from a new Fe (III) complex as oxidizing agent, Indian Journal of Chemistry, (2013). 52A:744-748
Thus, the functioning group, such as carbonyl or hydroxyl group and structure optimizing of the natural dye including conjugating of dye becomes necessary in order to improve the efficiency [29].
Liu, Improved PEDOT: PSS/c-Si hybrid solar cell using inverted structure and effective passivation, Scientific reports, (2016). 6:35091
Ma, Dye-sensitized solar cells using 20 natural dyes as sensitizers, Journal of Photochemistry and Photobiology A: Chemistry, (2011). 219:188-194
Vijayan, Synthesis and properties of polypyrrole obtained from a new Fe (III) complex as oxidizing agent, Indian Journal of Chemistry, (2013). 52A:744-748
Online since: August 2022
Authors: Rajendrachari Shashanka, D. Ramesh, Kiran Kenchappa Kiran
Photocatalytic Degradation of Rhodamine B Dye by Nanocomposites:
A Review
Kiran K.S.1,a*, Ramesh D.2,b, Shashanka R.3, c*
1,2Dept. of Chemistry, Govt.
Phutanon et al. reported by using self-assembly method CuO flower like structure was synthesized and used efficiently degradation of Rh B dye [75].
Because of its reduced bandgap energy (2.0–2.77 eV), multiferroic characteristic, high photo absorption, and crystal structure, BFO nanomaterial is a photocatalyst increased by doping.
In: H P Nagaswarupa HCAM (ed) Current Trends in Materials Chemistry, I.
United Agencies, Mangalore, pp 17–43 [54] R S, Chaira D (2014) Phase transformation and microstructure study of nano-structured austenitic and ferritic stainless steel powders prepared by planetary milling.
Phutanon et al. reported by using self-assembly method CuO flower like structure was synthesized and used efficiently degradation of Rh B dye [75].
Because of its reduced bandgap energy (2.0–2.77 eV), multiferroic characteristic, high photo absorption, and crystal structure, BFO nanomaterial is a photocatalyst increased by doping.
In: H P Nagaswarupa HCAM (ed) Current Trends in Materials Chemistry, I.
United Agencies, Mangalore, pp 17–43 [54] R S, Chaira D (2014) Phase transformation and microstructure study of nano-structured austenitic and ferritic stainless steel powders prepared by planetary milling.
Online since: May 2012
Authors: Bei Zhu, Cheng Jun Zhu, Shan Chang, Yong Wen Zhang, Chao Zheng Wang
The phase structure, optical and electrical properties of CIASSe thin films were characterized by power X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectrophotometer and the Hall Effect Measurement system.
The results of different selenization parameters on phase structure properties, as well as electrical and optical properties associated with CIASSe thin film will be presented.
And all diffraction peaks follow standard bulk crystal structure patterns of CuInSe2 (JCPDS 65-2732) for CIASSe films after selenization at 400oC, 500oC and 550oC for 25min, respectively.
It illustrates that CIAS films have formed chalcopyrite structure after selenization process.
Chen: Journal of Physical Chemistry B Vol. 110 (2006), p. 17370 [9] I.
The results of different selenization parameters on phase structure properties, as well as electrical and optical properties associated with CIASSe thin film will be presented.
And all diffraction peaks follow standard bulk crystal structure patterns of CuInSe2 (JCPDS 65-2732) for CIASSe films after selenization at 400oC, 500oC and 550oC for 25min, respectively.
It illustrates that CIAS films have formed chalcopyrite structure after selenization process.
Chen: Journal of Physical Chemistry B Vol. 110 (2006), p. 17370 [9] I.
Online since: July 2012
Authors: Hua Li, He Zhou Liu, Hui Wen Wu
Synthesized PI was analyzed with respect to their molecular weights, chemical structures and solubility through GPC, FTIR, XRD and solubility tests respectively.
Another effective way is to make the polymer structure as “loose” as possible by introducing the side-group and loop-like structure with bulky volume [7-9], or asymmetrical monomers [10-11].
Both ways are to damage the ordered macromolecular structure and thus to make solvent easily diffuse into the polymer.
Synthesized PI was analyzed with respect to their molecular weights, chemical structures and solubility through GPC, FTIR, XRD and solubility tests respectively and effect of material ratio, imidization temperature and catalyst on polyimide’s molecular weight (MW) were studied.
The authors are grateful to Instrumental Analysis Centre of Shanghai JiaoTong University for providing the FTIR and XRD characterizations and School of Chemistry for providing GPC characterization.
Another effective way is to make the polymer structure as “loose” as possible by introducing the side-group and loop-like structure with bulky volume [7-9], or asymmetrical monomers [10-11].
Both ways are to damage the ordered macromolecular structure and thus to make solvent easily diffuse into the polymer.
Synthesized PI was analyzed with respect to their molecular weights, chemical structures and solubility through GPC, FTIR, XRD and solubility tests respectively and effect of material ratio, imidization temperature and catalyst on polyimide’s molecular weight (MW) were studied.
The authors are grateful to Instrumental Analysis Centre of Shanghai JiaoTong University for providing the FTIR and XRD characterizations and School of Chemistry for providing GPC characterization.
Online since: October 2023
Authors: Noor Abdulqader Hamdullah, Abdullahi Abdu Ibrahim, Nabil Majd Alawi, Hikmat Mohammed Hasan, Hayder Yousif Abed, Tukaram bai M., Sridevi Veluru, Husam Talib Hamzah, Venkata Rao Poiba, Rachakonda Srikanth
These methods are typically used to eliminate lignin, disrupt the cellulose crystalline structure, and reduce rigidity.
The recalcitrant nature of these materials is primarily attributed to their lignin content and structure.
Due to its high activated carbon, UTWP has a micro-mesoporous structure, providing a large surface area as measured by the BET.
Criteria for comparing infrared spectra – A review of the forensic and analytical chemistry literature.
Forensic Chemistry, 18, 100224. https://doi.org/10.1016/j.forc.2020.100224 [21] Parlak, C., Ramasami, P.
The recalcitrant nature of these materials is primarily attributed to their lignin content and structure.
Due to its high activated carbon, UTWP has a micro-mesoporous structure, providing a large surface area as measured by the BET.
Criteria for comparing infrared spectra – A review of the forensic and analytical chemistry literature.
Forensic Chemistry, 18, 100224. https://doi.org/10.1016/j.forc.2020.100224 [21] Parlak, C., Ramasami, P.
Online since: November 2011
Authors: Heng Lin Yang, Zhong Ian Tian, Li Song Zhang, Xiang Zhen Yan
Coal is dual porosity structure and contains joint fissures richly.
The rock can be considered as Hoek-Brown material when the structure is large and the rock is relatively small.
It takes the structure face's strength, coal and rock mass strength and a variety of factors into account.
If coal and rock mass is seriously affected by the structure, the GSI is among 45 to 55.
[6] HUANG Rong-Zun, CHEN Mian, DENG Jin-Gen, "Study on shale stability of wellbore by mechanics coupling with chemistry method", Drilling Fluid and Completion Fluid, vol.12, pp15-25, March,1995 [7] Hoek E and Brown E T, “Practical estimates of rock mass strength,” Int.
The rock can be considered as Hoek-Brown material when the structure is large and the rock is relatively small.
It takes the structure face's strength, coal and rock mass strength and a variety of factors into account.
If coal and rock mass is seriously affected by the structure, the GSI is among 45 to 55.
[6] HUANG Rong-Zun, CHEN Mian, DENG Jin-Gen, "Study on shale stability of wellbore by mechanics coupling with chemistry method", Drilling Fluid and Completion Fluid, vol.12, pp15-25, March,1995 [7] Hoek E and Brown E T, “Practical estimates of rock mass strength,” Int.