XPS and Raman study of the active-sites on molybdenum disulfide nanopetals for photocatalytic removal of rhodamine B and doxycycline hydrochlride.
Xuefeng AiHougang FanYijun WangYumeng GuoXiaoyan LiuLili YangHuilian LiuJinghai YangPublished in: RSC advances (2018)
Molybdenum disulfide (MoS 2 ) nanopetals were successfully synthesized by hydrothermal method (sample without sintering) and then sintered at different temperature (sintered samples). The products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen (N 2 ) adsorption analyses for Brunauer-Emmett-Teller (BET) specific surface area measurements, X-ray photoelectron spectrum (XPS) and Raman spectrum. XRD pattern indicated that the samples can be indexed to hexagonal phase 2H-MoS 2 . SEM and TEM images showed that the sintered MoS 2 nanopetals had sizes ranging from 150 to 300 nm with almost the same morphology. The pore structure and surface area were nearly the same for the three sintered MoS 2 nanopetals. Interestingly, XPS and Raman spectra implied that there was a few 1T-phase in the MoS 2 nanopetals which enhanced the photocatalytic performance greatly when sintered at low temperature.
Keyphrases
- electron microscopy
- visible light
- reduced graphene oxide
- quantum dots
- room temperature
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- gold nanoparticles
- deep learning
- raman spectroscopy
- magnetic resonance imaging
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- convolutional neural network
- density functional theory
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- aqueous solution
- dual energy