A new cyanuric-thiosemicarbazid (TSC-CC) chelating resin was synthesized and employed to selectively adsorb Ag⁺ from acid solutions. The effects of acid concentration, initial concentration of Ag⁺, contact time and coexisting ions were investigated. The optimal acid concentration was 0.5 mol/L. The adsorption capacity of Ag⁺ reached 872.63 mg/g at acid concentration of 0.5 mol/L. The adsorption isotherm was fitted well with the Langmuir isotherm model and the kinetic data preferably followed the pseudo-second order model. The chelating resin showed a good selectivity for the Ag⁺ adsorption from acid solutions. Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy/energy dispersive spectrometer (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) were used to study the adsorption mechanism. The chelating and ionic interaction was mainly adsorption mechanism. The adsorbent presents a great potential in selective recovery Ag⁺ from acid solutions due to the advantage of high adsorption capacity and adapting strongly acidic condition. The recyclability indicated that the (TSC-CC) resin had a good stability and can be recycled as a promising agent for removal of Ag⁺.

Diamond thin films are grown on silicon substrates by only using methanol and argon mixtures in microwave plasma chemical vapor deposition (MPCVD) reactor. It is worth mentioning that the novel strategy makes the synthesis reaction works smoothly without hydrogen atmosphere, and the substrates temperature is only 500 °C. The evidence of surface morphology and thickness under different time is obtained by characterizing the samples using scanning electron microscopy (SEM). X-ray diffractometer (XRD) spectrum reveals that the preferential orientation of (111) plane sample is obtained. The Raman spectra indicate that the dominant component of all the samples is a diamond. Moreover, the diamond phase content of the targeted films was quantitatively analyzed by X-ray photoelectron spectroscopy (XPS) method, and the surface roughness of diamond films was investigated by atomic force microscope (AFM). Meanwhile, the possible synthesis mechanism of the diamond films in methanol- and argon-mixed atmosphere was discussed.

In this study, the phase transformation mechanism of a high-alumina fly ash (HAFA)–Na2CO3 mixture was investigated by temperature- and time-programmed heating in a muffle furnace. The temperature range was 600–1000 °C, and the time interval was 20–120 min. The mass loss behaviour of the HAFA–Na2CO3 mixture was investigated by a thermogravimetric analysis method using argon at a heating rate of 10 °C/min. It was found that HAFA without any added flux showed no loss or gain of any element or material under the experimental conditions. The results also showed that HAFA hardly contained any volatile water, carbon, sulphur, or other components. The decomposition of Na2CO3 occurred at 844 °C, and the HAFA–Na2CO3 mixture began to react at 600 °C, indicating that the reaction of HAFA with Na2CO3 started before the decomposition of Na2CO3. The phase transformation of the HAFA–Na2CO3 mixture at different temperatures for 60 min or at 900 °C for different times was investigated by X-ray diffraction. Each reaction required different temperature conditions, and at a specific temperature, the length of the heating time affected the progress of the reaction.