Hydrothermal technology for nanotechnology

Byrappa, K.; Adschiri, Tadafumi

doi:10.1016/j.pcrysgrow.2007.04.001

Cited by 909 publications

(495 citation statements)

References 173 publications

Supporting

Mentioning

476

Contrasting

Unclassified

Order By: Relevance

“…633,670,671 Consequently, the thermodynamics of the local reaction environment favors reactions which may otherwise be kinetically inhibited at the bulk system temperature and pressure due to rate-determining steps such as interfacial reaction, crystal dissolution, dehydroxylation, diffusion, crystallization, etc. [672][673][674][675] Also, micro-autoclaves can be formed due to (a) device-and pulp-specific circumstances, (b) collision of two solid samples with rough surfaces and (c) compression of liquid in capillary pores (Fig. 37).…”

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

View full text Add to dashboard Cite

The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).

show abstract

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

View full text Add to dashboard Cite

show abstract

“…13 It favors a decrease in agglomeration among particles, narrow particle size distribution, phase homogeneity, and controlled particle morphology. 14 In a recent research, it is found that wool fabrics modified with TiO 2 nanoparticles on the surface then subsequently dyed with C. I. Reactive Blue 69 have both improved anti-felting property and better colour fastness to light. 15 In this study, we will investigate if it is feasible to treat textiles with nanoscaled TiO 2 particles and simultaneously to dye the textile substrates with reactive dyes in one step method; the property changes of Merino wool fibres before and after being treated, as well as dyeing efficiencies (percentage of exhaustion and K/S value), in one-pot process under low temperature hydrothermal conditions by using titanate tetrabutyl together with C. I. Reactive Blue 69 dye are systematically examined and compared with wool fibres being solely dyed using the same dye in similar conditions by employing thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC) techniques.…”

Section: ·-mentioning

confidence: 99%

Functional Modification with TiO₂ Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

Zhang

Yan

Mao

2014

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

ABSTRACT:Wool fibres are treated with titanate tetrabutyl in the presence of C. I. Reactive Blue 69 dye in one-pot process under hydrothermal conditions. The structural changes of wool fibres before and after treatments as well as the remaining particles are characterized by small-spot Micro X-ray fluorescence (µ-XRF), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC) techniques. The properties of percentage of exhaustion, K/S value, colour fastness to light, tension, photocatalytic activity, and diffuse reflectance spectrum (DRS) are also investigated. The experimental results indicate that after treatment with titanate tetrabutyl and C. I. Reactive Blue 69, wool fibres are evenly immobilized with a thin layer of anatase phase TiO 2 nanoparticles with an average grain size of less than 10 nm. The TiO 2 nanocrystals are synthesized and simultaneously grafted onto wool fibres via the C-Ti 4+ , S-Ti 4+ (Ti 2+ ), and N-Ti 4+ bonds. The thermal stability of wool fibres changes a little. The capability of wool fibres to protect against ultraviolet radiation is improved. The tensile properties decrease to some degree. The photocatalytic activity to decolourize methylene blue dye is endowed. A high degree of percentage of exhaustion and K/S value are obtained by adding a certain amount of acetic acid in the precursor solution, which can well be matched with the custom dip dyeing technique.

show abstract

“…And its products have high purity, 2 Journal of Nanomaterials small size, uniform distribution, and well chemical activity at low temperature. The solvent interact with the reactants at the molecular level, which provides a better control of stoichiometry, easy control of composition and structure, and ability to tailor particle size and morphology [17,18]. At present, the scientific research on the microstructure and optical and magnetic properties of Ni doped ZnS is not systematic and comprehensive.…”

Section: Introductionmentioning

confidence: 99%

Optical and Magnetic Properties of Ni Doped ZnS Diluted Magnetic Semiconductors Synthesized by Hydrothermal Method

Wei

Zhao

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

Diluted magnetic semiconductors Zn 1− Ni S with different consistency ratio ( = 0, 0.01, 0.03, 0.05, and 0.07) were successfully synthesized by hydrothermal method using ethylenediamine as a modifier. The influence of Ni doping concentration on the microstructure, morphology, and optical and magnetic properties of undoped and Ni doped ZnS nanocrystals was characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray energy dispersive spectrometry (XEDS), ultraviolet-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FT-IR), photoluminescence spectra (PL), and the vibrating sample magnetometer (VSM), respectively. The experiment results show the substitution of Ni 2+ on Zn 2+ sites without changing the hexagonal wurtzite structure of ZnS and generate single-phase Zn 1− Ni S with good crystallization. The lattice constant causes distortion and decreases with the increase of Ni 2+ doped concentration. The appearance of the samples is one-dimensional well-dispersed nanorods. UV-vis spectra reveal the band gap of all Zn 1− Ni S samples greater than that of bulk ZnS (3.67 eV), and blue shift phenomenon occurs. The photoluminescence spectra of undoped and doped samples possess the broad blue emission band in the range of 400-650 nm; the PL intensities of Zn 1− Ni S nanorods increase with the increase of Ni content comparing to pure ZnS and reach maximum for = 0.03. Magnetic measurements indicated that the undoped ZnS samples are superparamagnetic, whereas the doped samples exhibit ferromagnetism.

show abstract

Hydrothermal technology for nanotechnology

Cited by 909 publications

References 173 publications

Hallmarks of mechanochemistry: from nanoparticles to technology

Hallmarks of mechanochemistry: from nanoparticles to technology

Functional Modification with TiO₂ Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

Optical and Magnetic Properties of Ni Doped ZnS Diluted Magnetic Semiconductors Synthesized by Hydrothermal Method

Contact Info

Product

Resources

About

Hydrothermal technology for nanotechnology

Cited by 909 publications

References 173 publications

Hallmarks of mechanochemistry: from nanoparticles to technology

Hallmarks of mechanochemistry: from nanoparticles to technology

Functional Modification with TiO2 Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

Optical and Magnetic Properties of Ni Doped ZnS Diluted Magnetic Semiconductors Synthesized by Hydrothermal Method

Contact Info

Product

Resources

About

Functional Modification with TiO₂ Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process