Synthesis and characterization of CeO 2 /TiO 2 nanotube arrays and enhanced photocatalytic oxidative desulfurization performance

Lu, Xiaowang; Li, Xiazhang; Qian, Junchao; Miao, Naiming; Yao, Chao; Chen, Zhigang

doi:10.1016/j.jallcom.2015.11.148

Cited by 120 publications

(46 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Besides, the splitting energy of 18.3 eV between m 1 and n 1 suggests the existence of CeO 2. Also, the peak appearances of m 2 / n 2 (907.4/888.1 eV) and m 3 / m 3 (916.3/897.8 eV) are the characteristic peaks of Ce 4+ ions . This result also confirmed the successful synthesis of CuO/CeO 2 catalyst.…”

Section: Resultssupporting

confidence: 71%

Applying facilely synthesized CuO/CeO₂ photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Liu

Huang

et al. 2018

Surface & Interface Analysis

View full text Add to dashboard Cite

Textile and dye effluents have strong color, unstable pH and COD, a lot of inorganic salt, and high biotoxicity. It is difficult and inefficient to remove dyes from high‐saline wastewater by traditional methods. In this study, a simple synthetic CuO/CeO2 photocatalyst is used to achieve high efficiency photodegradation of methylene blue in high salt wastewater. The p‐type CuO/n‐type CeO2 heterojunction photocatalyst is synthesized by a modified hydrothermal‐calcination method. The XRD and XPS reveal the successful synthesis of CuO/CeO2 composite. The SEM and TEM images show that the sample consists of large amounts of well‐dispersed CuO nanosphere loading on the CeO2 layers. DRS exhibits the absorption band (about 510 nm) and the band gap energy (2.43 eV) of the CuO/CeO2 composite. Compared with pure CuO, CeO2, and TiO2 (P25), the prepared CuO/CeO2 can increase the mineralization rate of MB by 18.19%~33.74%. More than 80% of MB can be effectively removed in the wastewater containing 5~80 g/L NaCl with a wide pH value range of 2.11~9.02, and the degradation processes follow the pseudofirst‐order reaction kinetics. Active species trapping experiments confirm that the degradation of methylene blue is mainly attributed to hydroxyl radical; besides, O2▪− and hole (h+) also play important roles. Chlorine ions have dual effects in photocatalytic reactions. This work could provide a new approach to construct new heterojunction photocatalysts and a deeper insight for the treatment of hypersaline dye wastewater.

show abstract

Section: Resultssupporting

confidence: 71%

Applying facilely synthesized CuO/CeO₂ photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Liu

Huang

et al. 2018

Surface & Interface Analysis

View full text Add to dashboard Cite

show abstract

“…By the third method, metal decoration, two mechanisms can be involved to enhance the photocatalytic activity of TiO 2 : (I) replacement of  4 Ti in TiO 2 lattice by metals which results in a narrow band gap or (II) the use of noble metals to facilitate the electron transfer from TiO 2 to noble metals [15]. In comparison to the studies involving noble metals, transition metal ions and non-metal doped TiO 2 photocatalysts, there is a limited amount of reports about the use of rare-earth metals as dopants, such as, Cerium [16,17]. The improved photocatalytic activity of (rare-earth metals)-TiO 2 has been related to a decrease of the electron-hole recombination rate through electron capture by the incompletely occupied 4f and empty 5d orbitals of rare-earth metals.…”

Section: Co and O Hmentioning

confidence: 99%

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

et al. 2016

View full text Add to dashboard Cite

Diatomite-based recyclable photocatalysts containing single lanthanide doped TiO 2 nanoparticles (NPs) were synthesized by using simple sol-gel method. Photocatalytic activities of the prepared Ce-or La-single doped TiO 2 /diatomite catalysts were estimated by the degradation of Rhodamine B (RhB) under simulated sunlight irradiation. The XRD and Raman spectra shown only anatase phase of TiO 2 for the un-doped and Ce-doped samples. The TEM images revealed uniform distribution of TiO 2 NPs on the matrix, indicating that diatomite played an important role to prevent the agglomeration of TiO 2 NPs. Ce-TiO 2 /diatomite showed a red shift in UV-visible light absorption edge with enhanced absorption intensity than un-doped sample, whereas La-TiO 2 /diatomite showed a blue shift. The bandgap energy of 1.5%-Ce doped sample is as low as 2.75 eV. The XPS spectra showed the presence of both Ce 3+ and Ce 4+ oxidation states for Ce dopant. The photoluminescence spectra of the Ce-doped samples showed first decrease in the recombination centers with the maximum decrease for 1.5%-Ce doped sample and then started increase with the increasing Ce in the samples. As compared to the La-doped samples, a desired behavior was observed for the Ce-doped hybrid due to the redox Ce 4+ /Ce 3+ pairs acting as electron scavengers and localized unoccupied Ce 4f level narrowing the band gap. The incorporation with diatomite as support of TiO 2 nanoparticles is contributed for the improved reusability and also gives a promising strategy to enable the application of nano-photocatalysts in a real wastewater remediation treatment.

show abstract

“…For 2% and 3% samples, the wavenumber is red shifted to the visible-light region, and the absorption intensity aslo increases. It shows the enhancement of the charge moving between the conduction band and the valence band of TiO 2 and CeO 2 [22]. Moreover, the wavenumber of excess Cd loading (4%) is similar to Ce 0.2 TiO x samples.…”

Section: Uv-vis Drs Resultsmentioning

confidence: 71%

The Selective Catalytic Reduction of NOx Over Cd-Ce-Ti Metal Oxide Catalysts

Duan¹,

Liu²,

Shi³

et al. 2017

J Environ Anal Toxicol

View full text Add to dashboard Cite

Synthesis and characterization of CeO 2 /TiO 2 nanotube arrays and enhanced photocatalytic oxidative desulfurization performance

Cited by 120 publications

References 58 publications

Applying facilely synthesized CuO/CeO₂ photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Applying facilely synthesized CuO/CeO₂ photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

The Selective Catalytic Reduction of NOx Over Cd-Ce-Ti Metal Oxide Catalysts

Contact Info

Product

Resources

About

Synthesis and characterization of CeO 2 /TiO 2 nanotube arrays and enhanced photocatalytic oxidative desulfurization performance

Cited by 120 publications

References 58 publications

Applying facilely synthesized CuO/CeO2 photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Applying facilely synthesized CuO/CeO2 photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

The Selective Catalytic Reduction of NOx Over Cd-Ce-Ti Metal Oxide Catalysts

Contact Info

Product

Resources

About

Applying facilely synthesized CuO/CeO₂ photocatalyst to accelerate methylene blue degradation in hypersaline wastewater

Applying facilely synthesized CuO/CeO₂ photocatalyst to accelerate methylene blue degradation in hypersaline wastewater