Preparation of cerium-doped ZnO hierarchical micro/nanospheres with enhanced photocatalytic performance for phenol degradation under visible light

Sin, Jin–Chung; Lam, Sze–Mun; Lee, Keat Teong

doi:10.1016/j.molcata.2015.08.004

Cited by 79 publications

(26 citation statements)

References 52 publications

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“…Although there is abundant published work on doped ZnO nanostructures [80,81,258], large scale synthesis methods of doped ZnO particularly nonmetal doped ZnO with reguar morphologies should be further developed, which will enable its wide applications in catalysis. ii.…”

Section: Discussionmentioning

confidence: 99%

“…Various morphologies of ZnO nanomaterials undoped or doped with transition metal or rare earth metal were reported for photodegradation of phenol, 2,4-dichlorophenol (2,4-DCP), and 2-chlorophenol etc, especially by Sin et al [255][256][257][258][259][260][261]. Sm-doped ZnO nanorods and rare earth metal (Eu-, Ce-, Sm-) doped ZnO hierarchical micro/nanospheres were all successfully prepared for the photodegradation of phenol and 2,4-DCP [255][256][257][258][259].…”

Section: Photo-degradation Of Phenol and Other Pollutantsmentioning

confidence: 99%

“…For photo-catalysis, the morphology effects of ZnO have been summarized as shown in Table 2; the corresponding promotion mechanisms have been proposed in Figure 14 and as follows: (Eu-, Ce-, Sm-) doped ZnO hierarchical micro/nanospheres were all successfully prepared for the photodegradation of phenol and 2,4-DCP [255][256][257][258][259]. The enhanced photocatalytic performance was attributed to the narrow band gap, high charge separation efficiency, and high hydroxyl radical generation ability, induced by rare earth metal doping.…”

Section: Photo-degradation Of Phenol and Other Pollutantsmentioning

confidence: 99%

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The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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Zinc oxide (ZnO), with the unique chemical and physical properties of high chemical stability, broad radiation absorption range, high electrochemical coupling coefficient, and high photo-stability, is an attractive multifunctional material which has promoted great interest in many fields. What is more, its properties can be tuned by controllable synthesized morphologies. Therefore, after the success of the abundant morphology controllable synthesis, both the morphology-dependent ZnO properties and their related applications have been extensively investigated. This review concentrates on the properties of morphology-dependent ZnO and their applications in catalysis, mainly involved reactions on green energy and environmental issues, such as CO 2 hydrogenation to fuels, methanol steam reforming to generate H 2 , bio-diesel production, pollutant photo-degradation, etc. The impressive catalytic properties of ZnO are associated with morphology tuned specific microstructures, defects or abilities of electron transportation, etc. The main morphology-dependent promotion mechanisms are discussed and summarized.

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Section: Discussionmentioning

confidence: 99%

Section: Photo-degradation Of Phenol and Other Pollutantsmentioning

confidence: 99%

Section: Photo-degradation Of Phenol and Other Pollutantsmentioning

confidence: 99%

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The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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“…tert-Butanol was used to scavenge OH•, sodium iodide (NaI) to scavenge H + , and p-benzoquinone (P-BQ) for O 2 • −. 35,36 The same procedure described for the photocatalytic reaction was used, but with addition of 2 m mol L -1 of each scavenger in each case. Again the final concentration was determined by UV-visible spectrophotometry.…”

Section: Photocatalytic Activity On Ab29mentioning

confidence: 99%

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Ani

Akpan

Olutoye

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND Photodegradation has drawn much attention in recent decades due to the technique’s ability to mineralize nonbiodegradable pollutants. Renewable energy sources, such as solar light energy, can be used to aid the reaction in the present of a solar light‐responsive photocatalyst. Mixed metal oxides (TiO2‐ZnO) modified with graphitic carbon nitride (gCNS‐3TiZn) were synthesized successfully and employed for the degradation of AB29 under artificial solar light. Ultrasonication–hydrothermal treatment was used to develop gCNS‐3TiZn. RESULTS Surface analysis investigation showed that the material is mesoporous with 5 nm pore diameter and 195 m2 g–1 surface area. The optical analysis showed successful reduction in the band gap of the material, making it capable of efficiently absorbing light energy in the visible wave region. The developed gCNS‐3TiZn was 3.33‐fold faster at AB29 degradation than the unmodified mixed oxides under the same reaction conditions, and this was attributed to the reduction in band‐gap energy of the catalyst resulting in a better absorption of solar light. It took 60 min to attain complete degradation of 50 ppm AB29 using 1.25 g L–1 gCNS‐3TiZn loading, whereas the AB29 degradation by the unmodified catalyst under the same conditions took 200 min to attain complete degradation. Recyclability study on gCNS‐3TiZn revealed that it can be used up to 10 cycles in the degradation of the selected pollutant without diminished performance. CONCLUSION The synthesized photocatalyst is a potential candidate for real wastewater treatment due to its reusability, stability and ability to utilize solar light as renewable energy source. © 2020 Society of Chemical Industry

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“…In the previous reports, the main oxidative species in photocatalytic process could be detected through trapping radicals, holes and •O 2 -by using t-BuOH (radical scavenger), EDTA-2Na (hole scavenger) and purging N 2 (•O 2 -scavenger), respectively [47]. They demonstrated that main oxidative species as •OH and •O 2 -radicals can play a significant role in the degradation of MB[47,48].…”

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confidence: 99%

Ultrasonic-assisted synthesis and photocatalytic performance of ZnO nanoplates and microflowers

Phuruangrat

Thongtem

2016

Materials & Design

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Preparation of cerium-doped ZnO hierarchical micro/nanospheres with enhanced photocatalytic performance for phenol degradation under visible light

Cited by 79 publications

References 52 publications

The Applications of Morphology Controlled ZnO in Catalysis

The Applications of Morphology Controlled ZnO in Catalysis

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Ultrasonic-assisted synthesis and photocatalytic performance of ZnO nanoplates and microflowers

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Preparation of cerium-doped ZnO hierarchical micro/nanospheres with enhanced photocatalytic performance for phenol degradation under visible light

Cited by 79 publications

References 52 publications

The Applications of Morphology Controlled ZnO in Catalysis

The Applications of Morphology Controlled ZnO in Catalysis

Solar light responsive TiO2‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Ultrasonic-assisted synthesis and photocatalytic performance of ZnO nanoplates and microflowers

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Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29