Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate‐Selective Membrane Electrode

Nezamzadeh‐Ejhieh, Alireza; Raja, G.

doi:10.1155/2013/685290

Cited by 18 publications

(8 citation statements)

References 41 publications

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“…Clinoptilolite is used not only in its initial form but also in its modified form. In recent years, numerous studies [ 15 , 17 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ] have contributed to the issue of clinoptilolite modification. It was pointed out that the area of application could be intensively expanded by the functionalization of external as well as internal surfaces of clinoptilolite.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Modification of Clinoptilolite

et al. 2017

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Clinoptilolite is a natural mineral with exceptional physical characteristics resulting from its special crystal structure, mainstreamed into a large zeolite group called heulandites. An overall view of the research related to the synthesis, modification and application of synthetic clinoptilolite is presented. A single phase of clinoptilolite can be hydrothermally synthesized for 1–10 days in an autoclave from various silica, alumina, and alkali sources with initial Si/Al ratio from 3.0 to 5.0 at a temperature range from 120 to 195 °C. Crystallization rate and crystallinity of clinoptilolite can be improved by seeding. The modification of clinoptilolite has received noticeable attention from the research community, since modified forms have specific properties and therefore their area of application has been broadening. This paper provides a review of the use of organic compounds such as quarter alkyl ammonium, polymer, amine and inorganic species used in the modification process, discusses the processes and mechanisms of clinoptilolite modification, and identifies research gaps and new perspectives.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Modification of Clinoptilolite

et al. 2017

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“…Clinoptilolite, one of the rarest natural zeolite especially in China, is a crystalline microporous aluminosilicate of alkali and alkaline earth cations with channels and pores running through the crystal [ 11 ]. The biological effects of clinoptilolite, such as adsorptivity, cation-exchange, and catalytic properties, are related to its unique structural characteristics, which are known as molecular sieves.…”

Section: Introductionmentioning

confidence: 99%

Influence of Butyrate Loaded Clinoptilolite Dietary Supplementation on Growth Performance, Development of Intestine and Antioxidant Capacity in Broiler Chickens

Zhou

Chen

et al. 2016

PLoS ONE

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The study was conducted to evaluate the effects of dietary butyrate loaded clinoptilolite (CLI-B) on growth performance, pancreatic digestive enzymes, intestinal development and histomorphology, as well as antioxidant capacity of serum and intestinal mucosal in chickens. Two hundred forty 1-day-old commercial Arbor Acres broilers were randomly assigned to 4 groups: CON group (fed basal diets), SB group (fed basal diet with 0.05% sodium butyrate), CLI group (fed basal diet with 1% clinoptilolite), and CLI-B group (fed basal diet with 1% CLI-B). The results showed that supplementation of CLI-B significantly decreased (P < 0.05) feed conservation ratio at both 21 and 42 days of age, improved the pancreatic digestive enzymes activities (P < 0.05), increased the villus length and villus/crypt ratio (P < 0.05), and decreased the crypt depth of intestine (P < 0.05) as compared to the other experimental groups. Furthermore, the CLI-B environment improved the antioxidant capacity by increasing the antioxidant enzyme activities (P < 0.05) in intestine mucosal, and decreasing the NO content and iNOS activity (P < 0.05) in serum. In addition, CLI-B supplementation had improved the development of intestine and antioxidant capacity of broilers than supplementation with either clinoptilolite or butyrate sodium alone. In conclusion, 1% CLI-B supplementation improved the health status, intestine development and antioxidant capacity in broiler chickens, thus appearing as an important feed additive for the poultry industry.

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“…According to the Hofmeister series mechanism which has been extensively investigated and widely discussed in previous references, − the charge of investigated ions plays a fundamental role in the ionic property of anions especially for Hofmeister anions. On the basis of our observations, CH 3 (CH 2 ) 11 SO 4 Na can modify the morphology of thiamine nitrate from rod to block, while there does not exist influence of CH 3 (CH 2 ) 11 SO 3 Na on the morphology of thiamine nitrate, although their structure is very similar.…”

Section: Results and Discussionmentioning

confidence: 99%

Effects of Additives on the Morphology of Thiamine Nitrate: The Great Difference of Two Kinds of Similar Additives

Han

Chen

Liu

et al. 2018

Crystal Growth & Design

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The growth of thiamine nitrate, in supersaturated aqueous solutions in the absence and presence of sodium alkyl sulfates CH3(CH2) n SO4Na and sodium alkyl sulfonates CH3(CH2) n SO3Na was studied by a single seed crystal growth experiment. It was surprisingly found that the growth of the a-axis of thiamine nitrate is significantly inhibited by CH3(CH2) n SO4Na, thus reducing the aspect ratio of thiamine nitrate, while the aspect ratio of thiamine nitrate in the presence of CH3(CH2) n SO3Na remains almost constant. Furthermore, the mechanism of additives to modify the crystal morphology is proposed: both additives can inhibit the growth of thiamine nitrate by hindering the solute diffusion. However, their unusual behavior is due to the selective adsorption, which was caused by electrostatic and hydrogen bond interactions between solute and additive molecules. In particular, the anionic groups exposed at the end of the additives demonstrate an interesting case in which a small variation in the charge density and hydrogen bonding ability can lead to a marked difference in modifying the crystal growth behavior. The results obtained from this study should be helpful in the performance evaluation and selection of the morphology modifiers for thiamine nitrate crystals.

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Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate‐Selective Membrane Electrode

Cited by 18 publications

References 41 publications

Synthesis and Modification of Clinoptilolite

Synthesis and Modification of Clinoptilolite

Influence of Butyrate Loaded Clinoptilolite Dietary Supplementation on Growth Performance, Development of Intestine and Antioxidant Capacity in Broiler Chickens

Effects of Additives on the Morphology of Thiamine Nitrate: The Great Difference of Two Kinds of Similar Additives

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