Impact of CuO loading for enhanced photocatalytic performance of CdS/CuO photocatalyst on rhodamine 6G dye decomposition under ultraviolet irradiation

Aziz, Nor Azlia Binti; Sheng, Chan Kok

doi:10.1016/j.matlet.2023.134589

Cited by 8 publications

(1 citation statement)

References 14 publications

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“…Interestingly, the formation of heterojunctions not only boosts carrier migration but also diminishes the band gap of metal oxides, improving their photocatalytic activity. A series of binary heterojunctions such as CuO/ZnO heterojunctions [ 15 ], TiO 2 /ZnO heterojunctions [ 17 ], and SnO 2 @CdS [ 18 ] nanowire-quantum dot heterostructures can be synthesized by using preparative methods such as hydrothermal, sol-gel spin-coating, and wet-chemical methods, as demonstrated by previous studies. Compared to single-phase metal oxides, binary heterojunctions hinder the recombination of e-/h+ pairs to some extent, reducing the band gap and improving the utilization of visible light [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Enhancement of Carrier Migration by SnO2/ZnO@GO Heterojunction for Rapid Degradation of RhB

Chen,

Li,

Wang

et al. 2024

Molecules

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Organic dyes in natural waters jeopardize human health. Whether semiconductor materials can effectively degrade dyes has become a challenge for scientific research. Based on this, this study rationally prepared different nanocomposites to remove organic dyes effectively. Pure SnO2 quantum dots, ZnO nanosheets, and SnO2/ZnO (ZS) binary nanocomposites are prepared using the hydrothermal method. Subsequently, SnO2/ZnO@GO (ZSG) ternary composites containing different amounts of GO, i.e., ZSG-5, ZSG-15, and ZSG-25, are synthesized by an ultrasonic water bath method, in which ZS was coupled with GO to form Z-type heterojunctions. The ZSG-15 ternary composites exhibited excellent photocatalytic activity for the degradation of rhodamine B by simulating sunlight. The test results show that the degradation rate of ZSG-15 is about 7.6 times higher than ZnO. The increase in photocatalytic activity is attributed to the synergistic effect of SnO2 and GO to improve the separation efficiency of photogenerated carriers in ZnO. Notably, the large specific surface area of GO increases the reactive sites. Compared with binary nanocomposites, ZSG-15 broadens the response range to light while further accelerating the electron transport rate and improving the photoelectric stability.

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