TY - JOUR
T1 - Controllable preparation and efficient visible-light-driven photocatalytic removal of Cr(VI) using optimized Cd0.5Zn0.5S nanoparticles decorated H-Titanate nanotubes
AU - Zhang, Yuhao
AU - Lu, Dingze
AU - Kumar Kondamareddy, Kiran
AU - Zhang, Boyu
AU - Wu, Qiong
AU - Zhou, Min
AU - Zeng, Yimei
AU - Wang, Jiuxin
AU - Pei, Huanyu
AU - D, Neena
AU - Hao, Hongjuan
AU - Huang, Chi
AU - Fan, Huiqing
N1 - Publisher Copyright:
© 2021 The Society of Powder Technology Japan
PY - 2021/10
Y1 - 2021/10
N2 - Based on one-dimensional (1D) H-titanate nanotubes (H-TNTs: TNTs with loosely distributed H+ across the interlayers), a novel series of Cd0.5Zn0.5S loaded H-TNTs (Cd0.5Zn0.5S/TNTs) composites with varied ratios have been achieved by the in-situ growth method. The as-prepared samples were characterized by (high-resolution) transmission electron microscopy (HR/TEM), XRD, FT-IR, XPS, UV–vis diffuse reflectance spectroscopy (UV–vis DRS), fluorescence spectroscopy (FL), photocurrent, electron spin resonance (ESR) spectroscopy, etc. These studies concurrently revealed a successful formation of Cd0.5Zn0.5S/TNTs heterojunction, and a homogeneous distribution of Cd0.5Zn0.5S nanoparticles over the surface of 1D H-TNTs. The incorporation of the appropriate amount of Cd0.5Zn0.5S nanoparticles (10%) significantly improves the efficiency of photogenerated electron-hole pairs separation. The photocatalytic reduction efficiency of the Cd0.5Zn0.5S/TNTs for Cr(VI) and degradation efficiency for organic molecules increased initially and then decreased with the amount of loaded Cd0.5Zn0.5S nanoparticles. The optimal photocatalytic efficiency was observed at 10 %Cd0.5Zn0.5S/TNTs, which were 2.71-fold and 4.8-fold than that of pure H-TNTs for the removal of the Cr(VI) and the degradation of the organic molecules, respectively. The ESR test signified that the holes (h+) and superoxide radicals (∙O2–) played an essential role in the degradation process of organic molecules. Finally, a reasonable explanation for enhanced photocatalysis performance was proposed.
AB - Based on one-dimensional (1D) H-titanate nanotubes (H-TNTs: TNTs with loosely distributed H+ across the interlayers), a novel series of Cd0.5Zn0.5S loaded H-TNTs (Cd0.5Zn0.5S/TNTs) composites with varied ratios have been achieved by the in-situ growth method. The as-prepared samples were characterized by (high-resolution) transmission electron microscopy (HR/TEM), XRD, FT-IR, XPS, UV–vis diffuse reflectance spectroscopy (UV–vis DRS), fluorescence spectroscopy (FL), photocurrent, electron spin resonance (ESR) spectroscopy, etc. These studies concurrently revealed a successful formation of Cd0.5Zn0.5S/TNTs heterojunction, and a homogeneous distribution of Cd0.5Zn0.5S nanoparticles over the surface of 1D H-TNTs. The incorporation of the appropriate amount of Cd0.5Zn0.5S nanoparticles (10%) significantly improves the efficiency of photogenerated electron-hole pairs separation. The photocatalytic reduction efficiency of the Cd0.5Zn0.5S/TNTs for Cr(VI) and degradation efficiency for organic molecules increased initially and then decreased with the amount of loaded Cd0.5Zn0.5S nanoparticles. The optimal photocatalytic efficiency was observed at 10 %Cd0.5Zn0.5S/TNTs, which were 2.71-fold and 4.8-fold than that of pure H-TNTs for the removal of the Cr(VI) and the degradation of the organic molecules, respectively. The ESR test signified that the holes (h+) and superoxide radicals (∙O2–) played an essential role in the degradation process of organic molecules. Finally, a reasonable explanation for enhanced photocatalysis performance was proposed.
KW - CdZnS Nanoparticles
KW - CdZnS/TNTs
KW - Controllable Preparation
KW - H-titanate Nanotubes
KW - Photocatalytic Removal of Cr(VI)
UR - http://www.scopus.com/inward/record.url?scp=85114227937&partnerID=8YFLogxK
U2 - 10.1016/j.apt.2021.08.034
DO - 10.1016/j.apt.2021.08.034
M3 - 文章
AN - SCOPUS:85114227937
SN - 0921-8831
VL - 32
SP - 3788
EP - 3800
JO - Advanced Powder Technology
JF - Advanced Powder Technology
IS - 10
ER -