Green materials synthesis with supercritical water

Adschiri, Tadafumi; Lee, Youn Woo; Goto, Motonobu; Takami, Seiichi

doi:10.1039/c1gc15158d

Cited by 274 publications

(170 citation statements)

References 52 publications

(27 reference statements)

Supporting

Mentioning

159

Contrasting

Unclassified

Order By: Relevance

“…30 However, coating the NPs with biocompatible/organic polymers increases dispersion/stability, decreases nonspecific interactions with cells and proteins, increases blood circulation time and reduces the toxicity of the NPs. 31 Biomaterials possess functional groups such as -COOH, -OH and -NH 2 , and have the potential to stabilize and/or cap metal ions for preparation of various NPs via green chemistry methods. Recently, CeO 2 -NPs have been synthesized through several bio-directed methods applying natural and organic matrices as stabilizing agents in order to prepare biocompatible CeO 2 -NPs and solve the challenges to safely and effectively use this metal oxide for biomedicinal purposes.…”

Section: +mentioning

confidence: 99%

Cerium oxide nanoparticles: green synthesis and biological applications

Charbgoo

Ahmad

Darroudi

2017

IJN

253

125

View full text Add to dashboard Cite

CeO 2 nanoparticles (NPs) have shown promising approaches as therapeutic agents in biology and medical sciences. The physicochemical properties of CeO 2 -NPs, such as size, agglomeration status in liquid, and surface charge, play important roles in the ultimate interactions of the NP with target cells. Recently, CeO 2 -NPs have been synthesized through several bio-directed methods applying natural and organic matrices as stabilizing agents in order to prepare biocompatible CeO 2 -NPs, thereby solving the challenges regarding safety, and providing the appropriate situation for their effective use in biomedicine. This review discusses the different green strategies for CeO 2 -NPs synthesis, their advantages and challenges that are to be overcome. In addition, this review focuses on recent progress in the potential application of CeO 2 -NPs in biological and medical fields. Exploiting biocompatible CeO 2 -NPs may improve outcomes profoundly with the promise of effective neurodegenerative therapy and multiple applications in nanobiotechnology.

show abstract

Section: +mentioning

confidence: 99%

Cerium oxide nanoparticles: green synthesis and biological applications

Charbgoo

Ahmad

Darroudi

2017

IJN

253

125

View full text Add to dashboard Cite

show abstract

“…Supercritical ethanol (scEtOH) yields monodisperse metal nanoparticles [29], supercritical methanol (scMeOH) [30,31] or supercritical water (SCW) [32] yields zinc oxide (ZnO) nanoparticles, while SCW alone yields CeO 2 [33], TiO 2 [34], and magnetite (Fe 3 O 4 ) [35] nanoparticles. All of these reactions proceed in a short reaction time (several seconds to several minutes) [36][37][38][39][40][41]. However, a versatile synthetic method for MARIMO nanoparticles in supercritical fluids has yet to be established.…”

Section: Introductionmentioning

confidence: 99%

Versatility of one-pot, single-step synthetic approach for spherical porous (metal) oxide nanoparticles using supercritical alcohols

Wang

Ueno

Takigawa

et al. 2013

The Journal of Supercritical Fluids

View full text Add to dashboard Cite

We developed a rapid, one-pot, single-step synthetic method for preparing spherical porous (metal) oxides, titanium dioxide, silica, zirconium dioxide, cerium dioxide, and zinc oxide with large surface areas in a supercritical alcohol containing formic acid or phthalic acid as organic additive in a very short reaction time (10 min). A new type of hollow TiO 2 nanoparticle was obtained by slowly heating the reaction mixtures. The shell thickness of hollow TiO 2 nanoparticles was controlled by adjusting the heating rate.The method proved highly versatile for synthesizing solid and hollow spherical meso/microporous nanoparticles. The spherical mesoporous TiO 2 nanoparticles photocatalytically degraded methylene blue in water under UV irradiation, and successfully transported DNA under biolistic bombardment.

show abstract

“…However, these techniques generally require long reaction times (several hours) and complex multistep operations [1-43, 47, 48]. Recently, supercritical fluids have been applied in the synthesis of size-and morphology-controlled inorganic-organic hybrid metal and MO NPs [49][50][51][52][53][54][55][56][57][58][59][60][61]. All of these reported NP syntheses occur rapidly in supercritical fluids (several seconds to several minutes) [56][57][58][59][60][61].…”

Section: Introductionmentioning

confidence: 99%

Synthetic versatility of nanoparticles: A new, rapid, one-pot, single-step synthetic approach to spherical mesoporous (metal) oxide nanoparticles using supercritical alcohols

Wang

Kobiro

2014

Pure and Applied Chemistry

View full text Add to dashboard Cite

A simple, rapid (10 min), one-pot, single-step method for the preparation of solid and hollow spherical porous TiO 2 nanoparticles with large surface areas (100-211 m 2 /g) was developed in supercritical alcohols using carboxylic acids as organic additives. The shell thickness of the hollow TiO 2 nanoparticles (20-280 nm) was controlled by adjusting the heating rate (2.0-10.0 °C/min). The preparation of different spherical porous metal oxide nanoparticles, including CeO 2 , SiO 2 , TiO 2 , ZrO 2 , and ZnO, demonstrated the versatility of the synthetic approach. In addition, several rare earth-doped spherical mesoporous metal oxide nanoparticles, including CeO 2 :Er, CeO 2 :Er,Yb, ZrO 2 :Er, and TiO 2 :Er, which exhibit energy upconversion emission, were successfully prepared using this one-pot, single-step, supercritical methanol method. The obtained spherical mesoporous CeO 2 :Er and CeO 2 :Er,Yb nanoparticles emit green light upon excitation, even when irradiated with a low-power IR laser (980 nm, 10 mW) without calcination. Several other (metal) elements were also easily doped into spherical, mesoporous TiO 2 nanoparticles, such as Eu, Ce, Yb, Fe, and N, using a similar procedure. Furthermore, the spherical mesoporous TiO 2 nanoparticles were successfully applied as a new material for the transport of DNA via biolistic bombardment.

show abstract

Green materials synthesis with supercritical water

Cited by 274 publications

References 52 publications

Cerium oxide nanoparticles: green synthesis and biological applications

Cerium oxide nanoparticles: green synthesis and biological applications

Versatility of one-pot, single-step synthetic approach for spherical porous (metal) oxide nanoparticles using supercritical alcohols

Synthetic versatility of nanoparticles: A new, rapid, one-pot, single-step synthetic approach to spherical mesoporous (metal) oxide nanoparticles using supercritical alcohols

Contact Info

Product

Resources

About