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Effect of metal ion (Zn 2+ , Bi 3+ , Cr 3+ , and Ni 2+ )-doped CdS/halloysite nanotubes (HNTs) photocatalyst for the degradation of tetracycline under visible light

2013; Taylor & Francis; Volume: 53; Issue: 3 Linguagem: Inglês

10.1080/19443994.2013.844082

1944-3994

Weinan Xing, Liang Ni, Xinlin Liu, Yingying Luo, Ziyang Lu, Yongsheng Yan, Pengwei Huo,

Iron oxide chemistry and applications

CdS/halloysite nanotube (HNT) samples doped with several metal ions (Mn+-CdS/HNTs, where Mn+ = Zn2+, Bi3+, Cr3+, and Ni2+) were synthesized using a facile and effective hydrothermal method. The as-prepared photocatalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray energy dispersive spectroscopy, X-ray diffraction, UV–vis diffuse reflectance spectra, inductively coupled plasma-atomic emission spectroscope, X-ray photoelectron spectroscopy, and Fourier transform infrared. The photocatalytic activity of the Mn+-CdS/HNTs photocatalyst was evaluated by the degradation of tetracycline under visible-light irradiation. The optimum Mn+-doping amount was investigated in detail. At last, the possible photodegradation mechanism for metal-ion-doping photocatalyst was further discussed.