Sodium hydroxide modified graphene oxide was used as manganese oxide support for the preparation of three nanocomposite catalysts via an one-pot preparation route, for the degradation of an endocrine disruptor, bisphenol-A. The nanocomposites were characterized for their structure by X-ray diffr...

Two isostructural semiconducting germanium tellurides: HfGeTe4 and ZrGeTe4 have been investigated for the van der Waals epitaxy gap existing between layers of atoms using the charge density route. The Maximum Entropy Method (MEM) is used for the reconstruction of the charge density derived from ...

Single-crystal X-ray diffraction revealed that the structure of As2Ge7Te10 = (GeTe)7As2Te3 (space group R 3¯m) consists of rocksalt-type building blocks separated by van der Waals gaps. As and Ge are disordered on some of the cation sites. The rhombohedral 57R stacking sequence results in an ex...

Germanium-Telluride has been widely studied as a phase-change material due to its fast crystallization speed. The understanding of the crystallization kinetics is important to evaluate the potential applications of the material, but this is limited by the conventional calorimetry with low heatin...

A high-efficiency active terahertz wave modulator based on a molybdenum disulfide (MoS2)/germanium (Ge) structure was investigated. Spectrally broadband modulation of the THz transmission was obtained using optical control over the frequency range from 0.2 to 2.6 THz. The MoS2 monolayer structur...

The heat capacity of polycrystalline germanium disulfide α-GeS2 has been measured by relaxation calorimetry, adiabatic calorimetry, DSC and heat flux calorimetry from T = (2 to 1240) K. Values of the molar heat capacity, standard molar entropy and standard molar enthalpy are 66.191 J · K−1 · ...

Single crystals of Ge-doped TiS2 polytypes, 1T, (4H)2, 12R, and their corresponding new a√3 × a√3 superstructure were grown by chemical vapor transport method. The crystals were characterized by combining X-ray diffraction and transmission electron microscopy techniques. The structures of the...

In this work, we report the synthesis of Cu2ZnGeS4 (CZGS) thin films using a paste of binary metal sulfides by doctor blade technique. The precursor to deposit the films was obtained by mixing appropriate amounts of CuS, ZnS and GeS with triethanolamine and dilute acetic acid. Initially, the eff...

Background removal in X-ray photoelectron spectroscopy (XPS) spectra was carried out in CoMo hydrodesulfurization (HDS) catalysts supported alumina using traditional and recent methods. The sulfidation extent, expressed by the XPS area ratio AMo3d-MoS2/AMo3d-Total, which is a fundamental paramet...

Water-soluble germanium-doped cadmium sulfide quantum dots (Ge:CdS q-dots) were successfully synthesized by a facile one-pot method, and used as fluorescent probes for labeling live MCF-7 cells. The optical properties of the q-dots and several key parameters of the synthesis conditions were stud...

Article reports design and synthesis, technology, crystal structure determination and results of photoinduced nonlinear optical investigations of novel TlInGe2S6 crystals. We have discovered TlInGe2S6 as a new type of laser induced nonlinear optical materials. Following the performed measurement...

This paper proposed a promising method of improving the sulfidization flotation of smithsonite through surface modification with ammonia. The floatability of ammonia-modified smithsonite was superior to that of bare smithsonite under the same flotation condition due to the enhanced sulfidization...

The rare-earth germanium sulfide iodides RE3Ge2S8I (RE = La, Ce, Pr) have been prepared by reaction of the elements at 900 °C. They adopt the monoclinic La3(SiO4)2Cl-type structure (space group C2/c, Z = 4; a = 16.156(4)–15.9760(9) Å, b = 7.9776(18)–7.8786(5) Å, c = 11.081(3)–10.9281(6) Å, β...

A spectroscopic investigation of sodium germanate glasses activated with Ce3+, Tb3+ and Ce3+/Tb3+ is carried out by analyzing their photoluminescence spectra and decay times. Non-radiative energy transfer from Ce3+ to Tb3+ is observed upon near-UV excitation at 310 nm (peak emission wavelength o...

A spectroscopic analysis of sodium germanate glasses activated with Eu3+, Tb3+ and Eu3+/Tb3+ is performed from their photoluminescence spectra and decay times. In the Eu3+-singly doped glass reddish-orange light emission, with x=0.64 and y=0.35 CIE1931 chromaticity coordinates, is obtained upon ...

Sodium and potassium germanate glasses and their corresponding crystals are investigated by X-ray diffraction, Raman spectroscopy, and Fourier transforms infrared spectroscopy. Highly coordinated species of Ge are found in germanate glass. In the K2O-GeO2 glass system, three Ge structural units ...

Glasses with composition (59.5-x)P2O5–20.0MgO-20.0ZnSO4–0.5Dy2O3-xAgCl (0.0≤x≤ 0.5 mol%) were prepared by melt-quenching method and characterized thoroughly. The role of silver nanoparticles (Ag NPs) inclusion on the spectroscopic and the physical properties of the synthesized glasses were d...

Various documented formulations of magnesium germanate and flouro-germanate were synthesized by conventional solid state method at various temperatures to find out optimal synthesis conditions for maximum luminescence intensity. Relative efficiency of luminescence intensity and thermal stability...

A characteristic of magnesium (Mg) dissolution is that dissolution is accompanied by a concomitant increase in the hydrogen evolution reaction (HER), a phenomenon known as cathodic activation. When magnesium undergoes free corrosion or forced dissolution in response to anodic polarisation, catho...

Satisfactory corrosion resistance remains an issue in the widespread implementation of magnesium (Mg). The use of alloying to improve mechanical properties of Mg generally accelerates corrosion due to microstructural heterogeneity. However, recent works have revealed that additions of elements s...