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Volume 1, Issue 4 (November ‒ December 2014)

Development of Lead ‒ Free Frit to Get Rid of Lead Poisoning                           

Original Research Article

Journal of Chemistry and Materials Research Vol. 1 (4), 2014, 108–111

M. Saadet Khan, Phool Shahzadi *, Khalid Javed, Akhtar Shahnaz, M. Usman Alvi, Javed Naqvi, Abdul Ghaffar and Sajjad Hassan

 

 

Abstract

Due to poisonous nature of lead, it is totally replaced by borate compounds without impairing the quality of glazes. Borate compound increases fluxing action. Borax and boric acid are the most effective and economical raw materials for introducing B2O3 into frit. Borate glazes are used for the production of pottery, wall and floor tiles, stove tiles, bricks, roofing tiles, table wares and sanitary wares etc.

 

 

Keywords: Lead free frit; Borate compounds in glazes; Use of lead free frit in household.

Received
Received in revised
Accepted
20 August 2014
27 September 2014
07 October 2014
 

New Materials Based on Acridine: Correlation Structure – Properties and Optoelectronic Applications   

Original Research Article

Journal of Chemistry and Materials Research Vol. 1 (4), 2014, 112–122

Hayat Sadki, Samir Chtita, Mohammed Naciri Bennani, Tahar Lakhlifi, Mohammed Bouachrine*

 

 

Abstract

This paper is mainly about the theoretical investigations of the structural, optoelectronic and photovoltaic properties of sixteen conjugated compounds based on acridine. The quantum chemical calculations based on density functional theory (DFT) at B3LYP method with 6‒31G (d) basis set for all atoms is used as a measure to investigate the theoretical ground-state geometry and electronic structure of the pre-mentioned  materials. Furthermore, Gaussian 09 program package was used as a program to get the calculations done; the results were strengthened through the use of Gauss View 5.0. This paper also discussed the effect of different other substituent groups branched to the acridine ring on the geometries and electronic properties of these materials in order to investigate and then understand the relationship between molecular structure and optoelectronic properties. As a method of calculation, the TD‒B3LYP/6‒31G (d) method was used to calculation the absorption properties (λmax, Ea, OS) of such compounds. The S1/S0 electronic excitation is said to be the highest Occupied Molecular Orbital (HOMO) to lowest Unoccupied Molecular Orbital (LUMO) transition and it is different in terms of oscillator strength. Studying the organic solar cells can’t be effective except if it is accompanied with  a deep understanding of the theoretical knowledge of the HOMO and LUMO energy levels of the components, for this reason the researcher has calculated and discussed the HOMO, LUMO and Gap energy Voc (open circuit voltage) of the studied compounds. Therefore, these materials were suggested as a good candidate for organic dye-sensitized solar cells.

 

 

Keywords: π-conjugated molecules, acridine, organic solar cells, low band-gap, electronic properties, Voc (open circuit voltage).

Received

Received in revised
  Accepted
11 October 2014
-
18 October 2014
 

Non‒Conventional Light‒Weight Clay Bricks from Homra and Kraft Pulp Wastes

Original Research Article

Journal of Chemistry and Materials Research Vol. 1 (4), 2014, 123–129

 

H. H. M. Darweesh,* and M. G. El-Meligy

 

 

 

Abstract

The main objective of this work is to study the reutilization of kraft pulp waste (KPW), which is the primary waste of the paper industry, in clay brick. Due to the organic nature of the KPW, pore-forming ability in clay body was investigated. For this purpose, increasing amount of residue (0, 2, 4, 6 and 8 wt. %) was mixed with clay (TC) and homra waste (H) to produce building bricks. The influence of KPW addition on shaping, plasticity, density and mechanical properties of clay bricks was investigated. The addition of 2 to 6 % pulp waste was found to be effective for the pore forming in clay body with acceptable mechanical properties. Moreover, the fibrous nature of pulp waste does not create any extrusion problem, but the increase in its addition more than 6 wt. % increased the water content for the plasticity. As a conclusion, kraft pulp wastes can be used safely as an organic pore-forming agent in the manufacturing of clay-bricks, The optimum batch composition was 6 % KPW fired at 1000 ºC.

 

Keywords: Pulp waste; Clay brick; Plasticity; Density; Porosity, strength; SEM.

Received
  Received in revised
Accepted
24 September 2014
-
05 November 2014
 

Systems Theory and Cybernetics in Chemistry and Physics

Original Research Article

Journal of Chemistry and Materials Research Vol. 1 (4), 2014, 130–138

Lutvo Kurić *

 

Abstract

The modern science mainly treats the biochemical basis of sequencing in macromolecules and processes in chemistry and physics in Cosmos. One can ask weather the language of chemistry and physics is the adequate scientific language to explain the phenomenon in these sciences. Is there maybe some other language, out of chemistry and physics, that determines how the chemical and physical processes will function and what the? The research results provide some answers to these questions. They reveal to us that the process of sequencing in macromolecules is conditioned and determined not only through chemical and physical, but also through cybernetic and information principles.

 

Keywords:  Matrix code in nature; Program cyberspace and information systems; Quantum physics and chemistry; Gravity; Digital images in chemistry and physics.

Received
   Received in revised
   Accepted
02 September 2014
 -
22 November 2014