Diamond high temperature type tg dta thermoanalyzer

The structure and performance of the synthesized materials were characterized by several techniques. The FTIR spectra measurements were mounted by using a Perkin-Elmer Spectrum One FTIR spectrometer (Perkin-Elmer, United States) in KBr pellet at room temperature in a spectral range of 4000–400 cm⁻¹. ¹H nuclear magnetic resonance spectroscopy (¹H NMR) was recorded in a DMX-300 MHz instrument (Bruker, Germany) using CDCl₃ as the solvent. The XRD patterns were acquired on a RigakuD/MAX 2200 X-ray diffractometer (Tokyo, Japan). TGA was performed on a Diamond High Temperature Type TG/DTA thermoanalyzer (Perkin-Elmer, United States) under a N₂ atmosphere from room temperature to 800 °C with heating rate of 10 °C min⁻¹. The magnetization curves of samples were measured through MPMS3 system on superconducting quantum interference device (Quantum Design, USA) at 300 K. For zeta potential analysis, 10 mg of Fe₃O₄, MWHPO or MWHPO-GO powder was dispersed in 25 mL of ultrapure water with various pH values, respectively. The obtained solution samples were measured with a JS94H (Shanghai, China). SEM and energy-dispersive X-ray spectroscopy (EDX) were performed using a FEI QUANTA FEG250 coupled with INCA Energy X-MAX-50. Transmission electron microscopy (TEM) images were obtained from a JEOL JEM-100CX II.

The structure and performance of the prepared materials were characterized by several techniques. ¹H nuclear magnetic resonance spectroscopy (¹H NMR) was recorded in a DMX-300 MHz instrument (Bruker, Germany) using CDCl₃ as the solvent. The FTIR spectra measurements were mounted by using a Perkin-Elmer Spectrum One FTIR spectrometer (Perkin-Elmer, United States) in KBr pellet at room temperature in a spectral range of 4000–500 cm⁻¹. TGA was performed on a Diamond High Temperature Type TG/DTA thermoanalyzer (Perkin-Elmer, United States) under nitrogen atmosphere from room temperature to 800 °C with a heating rate of 10 °C min⁻¹. For zeta potential analysis, 5 mg of WHPA-OMCNT powder was dispersed in 10 mL of ultrapure water with various pH values. The obtained solution samples were measured with a JS94H (Shanghai, China). SEM images were recorded using a FEI QUANTA FEG250 coupled with INCA Energy X-MAX-50. Transmission electron microscopy (TEM) images were obtained from a JEOL JEM-100CX II.