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311 results on '"Pourmortazavi, Seied Mahdi"'

4. Engineering the photocatalytic performance of B-C3N4@Bi2S3 hybrid heterostructures for full‐spectrum‐driven Cr(VI) reduction and in-situ H2O2 generation: Experimental and DFT studies

Author

Ghoreishian, Seyed Majid, Ranjith, Kugalur Shanmugam, Ghasemi, Masoomeh, Park, Bumjun, Hwang, Seung-Kyu, Irannejad, Neda, Norouzi, Mohammad, Park, So Young, Behjatmanesh-Ardakani, Reza, Pourmortazavi, Seied Mahdi, Mirsadeghi, Somayeh, Han, Young-Kyu, and Huh, Yun Suk

Published
2023
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24. Facile and Effective Synthesis of Praseodymium Tungstate Nanoparticles through an Optimized Procedure and Investigation of Photocatalytic Activity

Author

Pourmortazavi Seied Mahdi, Rahimi-Nasrabadi Mehdi, Ganjali Mohammad Reza, Karimi Meisam Sadeghpour, Norouzi Parviz, and Faridbod Farnoosh

Subjects
Nanoparticles, Praseodymium, Tungstate, Process optimization, Photocatalyst, Chemistry, QD1-999
Abstract

Regarding the importance of nanoparticles in today’s world, and in the light of the fact that their preparation can be a rather difficult task, we focused on the applicability of a simplistic direct precipitation approach for the preparation of praseodymium tungstate nanoparticles. To maximize the effectiveness of the method, a Taguchi robust design approach was applied to optimize the reaction in terms of the operating conditions influencing its outcome and the results were monitored by characterization of the Pr2(WO4)3 nanoparticles. Among the four parameters studied we found the dimensions of the produced nanoparticles to be determined by the concentrations of Pr3+ and WO43− solutions and the reaction temperature, while the flow rate of adding the cation solutions to the anion solution was found to leave very negligible effects on the product characteristics. To confirm the effect of the optimizations on the outcomes of the reaction, SEM, TEM, EDX, XRD, FT-IR and UV-Vis structural and morphological characterizations of the products were performed, the results of which were in agreement with those statistically predicted in the optimization procedure. Furthermore, as-synthesized praseodymium tungstate nanoparticles under ultraviolet light exhibited an efficient photocatalyst property in the photocatalytic degradation of methylene blue.

Published
2017
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38. Application of polysaccharide biopolymers as natural adsorbent in sample preparation.

Author

Sheibani, Esmaeil, Hosseini, Asieh, Sobhani Nasab, Ali, Adib, Kourosh, Ganjali, Mohammad Reza, Pourmortazavi, Seied Mahdi, Ahmadi, Farhad, Marzi Khosrowshahi, Elnaz, Mirsadeghi, Somayeh, Rahimi-Nasrabadi, Mehdi, and Ehrlich, Hermann

Subjects
POLYSACCHARIDES, SOLID phase extraction, BIOPOLYMERS, FUNCTIONAL groups
Abstract

Preparing samples for analyses is perhaps the most important part to analyses. The varied functional groups present on the surface of biopolymers bestow them appropriate adsorption properties. Properties like biocompatibility, biodegradability, presence of different surface functional group, high porosity, considerable absorption capacity for water, the potential for modification, etc. turn biopolymers to promising candidates for varied applications. In addition, one of the most important parts of determination of an analyte in a matrix is sample preparation step and the efficiency of this step in solid phase extraction methods is largely dependent on the type of adsorbent used. Due to the unique properties of biopolymers they are considered an appropriate choice for using as sorbent in sample preparation methods that use from a solid adsorbent. Many review articles have been published on the application of diverse adsorbents in sample preparation methods, however despite the numerous advantages of biopolymers mentioned; review articles in this field are very few. Thus, in this paper we review the reports in different areas of sample preparation that use polysaccharides-based biopolymers as sorbents for extraction and determination of diverse organic and inorganic analytes. [ABSTRACT FROM AUTHOR]

Published
2023
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