Infrared Spectra of Inorganic Compounds

Nyquist, Richard A.; Kagel, R. O.

doi:10.1016/b978-0-12-523450-4.50005-5

Cited by 1,144 publications

(863 citation statements)

References 2 publications

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“…Fundamental frequencies of the pyramidal iodate ions as have been reported earlier by Nassau et al [14], Dasent and Waddington [15], Balicheva and Petrova [16], Sanyal and Nag [17], and Nyquist and Kagal [18] are in good agreement with the observed values. Table 2 represents the vibrational frequencies for the undoped and doped barium iodate crystals.…”

Section: B Ft-ir Spectral Analysissupporting

confidence: 81%

Study of XRD, FT-IR and Nonlinear Optical Properties of Doped and Undoped Barium Iodate Crystals Grown in Silica Gel

Shitole¹

2012

IJAPM

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Abstract-Single crystals of barium iodate were grown by simple gel technique by single diffusion method. By varying various parameters, optimum conditions for the growth were established. Crystals having different morphologies and habits were obtained. Prismatic, prismatic pyramidal, dendritic crystals were obtained. Some of them were transparent, some were transluscent, and few others were opaque. The crystals were doped by impurities such as Fe 3+ and Cu 2+ . The formation of the compound was verified by X-ray diffractograms. The results were compared with the standard values given in JCPDS file. It confirms that the grown crystals are barium iodate, monohydrate. Structural analysis was carried out using FT-IR technique. It confirms the iodate group of the grown crystals. Nonlinear optical properties were studied by using powder second harmonic generation method. Effect of doping of Fe 3+ and Cu 2+ on the structure and nonlinear optical properties of bulk crystals was studied. Doping has no effect on the structure. Doping of Cu +2 inhibits nonlinear behavior of the substance, while Fe +3 doping of has less negative effect.

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Section: B Ft-ir Spectral Analysissupporting

confidence: 81%

Study of XRD, FT-IR and Nonlinear Optical Properties of Doped and Undoped Barium Iodate Crystals Grown in Silica Gel

Shitole¹

2012

IJAPM

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“…The -COOH group has a stretching vibration of C=O at 1714 cm -1 and the stretching vibration for C-O at 1267 cm -1 [34,35]. Finally, a band at 951 cm -1 is attributed to O-H out of plane wagging [36]. 8 In the spectrum of SPION (Fig.…”

Section: Characterization Of Adsorbent Materialsmentioning

confidence: 97%

Arsenate removal with 3-mercaptopropanoic acid-coated superparamagnetic iron oxide nanoparticles

Morillo

Uheida

Pérez

et al. 2015

Journal of Colloid and Interface Science

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In the present work, superparamagnetic iron oxide nanoparticles (SPION) surface-coated with 3-mercaptopropanoic acid (3-MPA) were prepared and their feasibility for the removal of arsenate from dilute aqueous solutions was demonstrated. The synthesized 3-MPA-coated SPION was characterized using transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier transform infra-red spectrometry (FTIR). Separation efficiency of the coated nanoparticles and the equilibrium isotherm of arsenate adsorption were investigated. The obtained results reveal the arsenate adsorption to be highly pH-dependent, and the maximum adsorption was attained in less than 60 minutes. The resulting increase of 3-MPA-coated SPION adsorption capacity to twice the adsorption capacity of SPION alone under the same conditions is attributed to the increase of active adsorption sites. An adsorption reaction is proposed. On the other hand, efficient recovery of arsenate from the loaded nanoparticles was achieved using nitric acid (HNO 3 ) solution, which also provides a concentration over the original arsenate solution. HIGHLIGHTS• Feasibility of using SPION modified with 3MPA for the removal of As(V).• The adsorbent system results in an effective sorption for selective As(V) removal.• The adsorption capacity for As(V) is higher comparing with other adsorbent systems.• Adsorption mechanism has been proposed as the most suitable considering the results.

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“…Figure 1) and to further check the purity of the prepared CuO nanocrystals. The band at 425 cm -1 can be assigned to the Cu-OH stretching mode of residual Cu(OH) 2 [61] which could be hidden in the tails of the diffraction patterns. The absorption peaks at around 418 cm -1 , 536 cm -1 and 590 cm -1 are due to stretching of the Cu-O bond along the [101] direction [62][63][64].…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

Dodoo‐Arhin

Leoni

Scardi

2012

Molecular Crystals and Liquid Crystals

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Copper oxide (CuO) nanorod-like structures made of spherical nanocrystals were synthesized at moderate temperature (80°C) starting from CuCl 2 •2H 2 O crystals in a water/n-heptane microemulsion stabilised by the nonionic Brij-30 surfactant. Whole Powder Pattern Modelling of the X-ray diffraction pattern shows absence of linear and planar defects with crystalline domains in the range of 4 -8 nm. A linear correlation between the average size of the particles and the quantity of water in the system was observed: all synthesised specimens show a large blue shift of the energy bandgap (up to 2.7 eV versus 1.2 eV of bulk CuO) resulting from quantum confinement effects. The mechanism of growth of the spherical nanoparticles into nanorod-like structures has been elucidated.

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Infrared Spectra of Inorganic Compounds

Cited by 1,144 publications

References 2 publications

Study of XRD, FT-IR and Nonlinear Optical Properties of Doped and Undoped Barium Iodate Crystals Grown in Silica Gel

Study of XRD, FT-IR and Nonlinear Optical Properties of Doped and Undoped Barium Iodate Crystals Grown in Silica Gel

Arsenate removal with 3-mercaptopropanoic acid-coated superparamagnetic iron oxide nanoparticles

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

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