Selective Exchange and Fixation of Strontium Ions with Ultrafine Na-4-mica

Kodama, Tetsuya; Harada, Yukihiro; Ueda, Masahito; Shimizu, Ken‐ichi; Shuto, Kenji; Komarneni, Sridhar

doi:10.1021/la001774w

Cited by 85 publications

(71 citation statements)

References 29 publications

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“…Four kinetics models were used to analyse the kinetic data of MB and CR photocatalytic degradation on TiO 2 [20][21][22][23] :…”

Section: The Degradation Kinetic Modelsmentioning

confidence: 99%

“…A small band around 600 nm wavelength for both case of TiO 2 (P25) and synthesized TiO 2 was observed because two aromatic rings in MB starts to degrade creating a mono substituted molecule. This indicates that the photodegradation not only destroys the conjugate system (including −N=N−) but also breaks down partially or totally the intermediate products [19][20][21][22][23][24][25]. Comparing the two dyes, it is observed that chemical structure of MB lends itself more to oxidation by hydroxyl radicals, than does CR.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

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Photocatalytic Degradation of Different Dyes Using TiO2 with High Surface Area: A Kinetic Study

et al. 2013

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Nanocrystalline TiO 2 was synthesized by using one step sol-gel method and characterized by SEM, XRD and EDS. UV-Vis spectroscopic technique has been used for studying the photocatalytic degradation kinetics of methylene blue (MB) and congo red (CR). A comparative study with commercial TiO 2 (P25) was also done to find out the effectiveness of this synthesized TiO 2 . The synthesized TiO 2 exhibited a high photocatalytic activity for the degradation of MB and CR but the commercial TiO 2 was more efficient.

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“…Four kinetics models were used to analyse the kinetic data of MB and CR photocatalytic degradation on TiO 2 [20][21][22][23] :…”

Section: The Degradation Kinetic Modelsmentioning

confidence: 99%

Section: Photocatalytic Activitymentioning

confidence: 99%

Photocatalytic Degradation of Different Dyes Using TiO2 with High Surface Area: A Kinetic Study

et al. 2013

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“…It was suggested that the release of guest anion from the nanocomposite could be best described either by dissolution of LDH [18,19] or by diffusion through the LDH [20,21]. The methods used are zeroth order (Equation (1)) [22], first order (Equation (2)) [23], pseudosecond order (Equation (3)) [24] and parabolic diffusion (Equation (4)) [21], for which the equations are given below.…”

Section: Kinetic Studymentioning

confidence: 99%

“…The methods used are zeroth order (Equation (1)) [22], first order (Equation (2)) [23], pseudosecond order (Equation (3)) [24] and parabolic diffusion (Equation (4)) [21], for which the equations are given below. The x is the percentage release of herbicides anion at time t, M i and M f are the initial and final concentrations of herbicides anions, respectively and C is a constant.…”

Section: Kinetic Studymentioning

confidence: 99%

Synthesis and controlled release of cloprop herbicides from cloprop-layered double hydroxide and cloprop-zinc-layered hydroxide nanocomposites

Hashim¹,

Hussein²,

Isa³

et al. 2014

OJIC

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Two phenoxyherbicide nanocomposites, namely cloprop-layered double hydroxide and cloprop-zinclayered hydroxide nanocomposites, have been synthesized by using co-precipitation and direct reaction method. PXRD pattern showed an expansion of interlayer spacing with the value of 21.0 Å and 22.7 Å for cloprop-layered double hydroxide and cloprop-zinclayered hydroxide nanocomposite, respectively. It is evident from FTIR and elemental analyses that both nanocomposites were successfully intercalated between the interlayers of layered metal hydroxide. Controlled release of cloprop anion from interlayer of nanocomposites for both cloprop-layered double hydroxide and cloprop-zinc-layered hydroxide nanocomposite into phosphate solution was rapid initially and slow thereafter. The percentage of accumulated release of cloprop anion from cloprop-zinc-layered hydroxide nanocomposite was slightly higher than that from cloprop-layered double hydroxide nanocomposite. Kinetic behavior of cloprop release was governed by pseudo-second-order for cloprop-layered double hydroxide nanocomposite while parabolic diffusion for cloprop-zinc-layered hydroxide nanocomposite. Results from this study highlight the potential of both nanocomposites as capsulated material for controlled release of cloprop phenoxyherbicides anion.

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“…Four dissolution-diffusion kinetic models were used to fit the in vitro VP16-LDH release profiles. [36][37][38][39][40] The zero-order model:…”

Section: In Vitro Vp16 Release Test From Vp16-ldhmentioning

confidence: 99%

The in vitro sustained release profile and antitumor effect of etoposide-layered double hydroxide nanohybrids

Qin¹,

Wang²,

Zhu³

et al. 2013

IJN

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Magnesium-aluminum layered double hydroxides intercalated with antitumor drug etoposide (VP16) were prepared for the first time using a two-step procedure. The X-ray powder diffraction data suggested the intercalation of VP16 into layers with the increased basal spacing from 0.84-1.18 nm was successful. Then, it was characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetry and differential thermal analysis, and transmission electron microscopy. The prepared nanoparticles, VP16-LDH, showed an average diameter of 62.5 nm with a zeta potential of 20.5 mV. Evaluation of the buffering effect of VP16-LDH indicated that the nanohybrids were ideal for administration of the drugs that treat human stomach irritation. The loading amount of intercalated VP16 was 21.94% and possessed a profile of sustained release. The mechanism of VP16-LDH release in the phosphate buffered saline solution at pH 7.4 is likely controlled by the diffusion of VP16 anions from inside to the surface of LDH particles. The in vitro cytotoxicity and antitumor assays indicated that VP16-LDH hybrids were less toxic to GES-1 cells while exhibiting better antitumor efficacy on MKN45 and SGC-7901 cells. These results imply that VP16-LDH is a potential antitumor drug for a broad range of gastric cancer therapeutic applications.

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Selective Exchange and Fixation of Strontium Ions with Ultrafine Na-4-mica

Cited by 85 publications

References 29 publications

Photocatalytic Degradation of Different Dyes Using TiO2 with High Surface Area: A Kinetic Study

Photocatalytic Degradation of Different Dyes Using TiO2 with High Surface Area: A Kinetic Study

Synthesis and controlled release of cloprop herbicides from cloprop-layered double hydroxide and cloprop-zinc-layered hydroxide nanocomposites

The in vitro sustained release profile and antitumor effect of etoposide-layered double hydroxide nanohybrids

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