Preparation of pyramidal SnO/CeO₂ nano-heterojunctions with enhanced photocatalytic activity for degradation of tetracycline

Abstract

Pyramidal SnO/CeO 2 nano-heterojunction photocatalysts were successfully synthesized via a facile hydrothermal method. The structural characterization was investigated by using common characterization tools. The content of SnO affected the morphology and photocatalytic performance of the SnO/CeO 2 nano-heterojunctions. With the increase of the SnO content, the morphology of the samples changed from a spherical structure to a pyramidal structure. The photocurrent of the SnO/CeO 2 (1:6) sample was about 36 times that of pure CeO 2 . With SnO/CeO 2 (1:6) as the photocatalyst, the degradation rate of tetracycline (TC) was 99% within 140 min under visible light and after five cyclic tests the photocatalytic efficiency of TC remained at 98%, which suggests that the SnO/CeO 2 (1:6) nano-heterojunction had a high photocatalytic efficiency and stable photocatalytic performance. These results indicate that SnO/CeO 2 (1:6) nano-heterojunction possesses broad prospects for industrial application.

Low-Operating-Temperature NO2 Sensor Based on a CeO2/ZnO Heterojunction

“…Following the manufacturing of the heterojunction, an internal built-in field from the CeO 2 zone to the ZnO zone will develop at the interface due to charge accumulation, as shown in Figure 8b [41,42], while decreasing the likelihood of electrons in the ZnO conduction band transferring to CeO 2 owing to the existence of a potential barrier at the interface [43,44]. With the effect of the internal built-in field and the potential barrier, the ZnO side of the heterojunction accumulates more electrons, increasing the carrier concentration significantly.…”

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

“…For example, TiO 2 [16], g-C 3 N 4 [17], ZnS [18], and BiVO 4 [19] have been used to achieve the removal of TC from aqueous solution. The use of binary composites such as ZnO/g-C 3 N 4 [20], FeNi 3 @SiO 2 [21], Sr-Bi 2 O 3 [22], SnO/CeO 2 [23], and ZnO/γ-Fe 2 O 3 [24] or ternary composites including MGO-Ce-TiO 2 [25], CeO 2 / Bi 2 O 2 CO 3 [26], Ag/Ag 2 CO 3 /BiVO 4 [27], and IO-TiO 2 -CdS [28] have also been reported. However, due to some demerits associated with some of these materials such as high cost, economical nonviability, and poor efficiency, there is a need to explore other semiconductors.…”

Fabrication and Characterization of Co-Doped Fe2O3 Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

“… 5 , 6 Tetracycline, one of the most representative antimicrobial agents, has been widely used in veterinary, agriculture, medical, and clinical therapy applications. 7 , 8 However, tetracycline has a stable aromatic structure and functional groups; a large amount of tetracycline remains in the aquatic environment due to low removal efficiency in natural conditions. 9 To treat tetracycline, various techniques including physical adsorption, filtration, biological methods, chlorine oxidation, ozonation oxidation, etc., have been developed.…”