Fabrication of a Z-scheme CeO2/Bi2O4 heterojunction photocatalyst with superior visible-light responsive photocatalytic performance

Wu, Danping; Zhang, Xian; Liu, Shiwen; Ren, Ziying; Xing, Yonglei; Jin, Xiaoyong; Ni, Gang

doi:10.1016/j.jallcom.2022.164671

Cited by 33 publications

(6 citation statements)

References 63 publications

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“…The active species is the main force of photocatalyst participating in photocatalytic reaction to degrade drugs, which can be confirmed by a series of experiments including capture experiment, hydroxyl radical validation experiment and ESR/EPR experiment [36][37][38][39]. are the main reactive species in the process of spinel NiAl 2 O 4 for the degradation of TC.…”

Section: Free Radical Validation Experimentsmentioning

confidence: 73%

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Yu,

Wang,

Xie

et al. 2023

J. Phys.: Condens. Matter

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Four kinds of spinel NiAl2O4 were synthesized by the polyacrylamide gel method using Al2(SO4)3·18H2O and Al(NO3)3·9H2O as aluminum salts and anhydrous NiSO4 and NiSO4·6H2O as nickel salts. The effects of different aluminum salts and nickel salts on the structure, optical and photocatalytic activity of spinel NiAl2O4 were confirmed by various characterizations. There is no NiO impurity in the spinel NiAl2O4 synthesized with Al2(SO4)3·18H2O as aluminum salt, while NiAl2O4, NiO and C–O functional group coexist in the target product with Al(NO3)3·9H2O as aluminum salt, and C–O functional group and NiO inhibits the photocatalytic activity of the system. Based on photocatalytic experiment, response surface methodology and free radical verification experiment, the influence of experimental parameters including synthesis pathway, initial drug concentration, initial pH and catalyst content on the photocatalytic activity of spinel NiAl2O4 and the main active species involved in the reaction were investigated. The degradation percentage of spinel NiAl2O4 synthesized with Al2(SO4)3·18H2O as aluminum salt and NiSO4·6H2O as nickel salt was 86.3% at the initial concentration of 50 mg l−1, pH = 5.33 and catalyst content of 1 g l−1. The mechanism investigation confirmed that the C–O functional group plays the dual role of impurity level and electron transfer in the degradation of tetracycline hydrochloride by spinel NiAl2O4.

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Section: Free Radical Validation Experimentsmentioning

confidence: 73%

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Yu,

Wang,

Xie

et al. 2023

J. Phys.: Condens. Matter

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“…In Figure 7a, we can see that the pure CeO2 exhibited an intensive PL peak positioned at 406.3 nm due to the large recombination of the Photoluminescence (PL) spectral emission and photocurrent intensity are regarded as powerful means for understanding the photocatalytic activity promotion of the 15% Bi 2 O 3 /CeO 2 as seen in Figure 7 [41,52,53]. In Figure 7a, we can see that the pure CeO 2 exhibited an intensive PL peak positioned at 406.3 nm due to the large recombination of the photogenerated charges [44]. The introduction of 5, 10, 15, and 20 wt.% Bi 2 O 3 amounts clearly quenched the PL intensity by 12, 21, 32, and 32.1%, respectively.…”

Section: Photoreduction Of Co2 Over Bi2o3/ceo2 Heterojunctionsmentioning

confidence: 98%

“…The Bi 4f the high-resolution spectrum (Figure 4a) was deconvoluted into two oxidation states for the majority of Bi 3+ at binding energies of 164.2 and 159.2 eV for 4f 5/2 and 4f 7/2 , respectively, and a minority of Bi 5+ at 165.0 and 160.5 eV for the corresponding mentioned orbitals [49]. The Ce 3d spectrum (Figure 4b) was deconvoluted into the coexisting minority Ce 3+ and the majority of Ce 4+ [44]. The Ce 3+ is located at 902.1 and 886.5 for 3d 3/2 and 3d 5/2 orbitals [46].…”

Section: Structural Surface and Optical Investigations Of The Produce...mentioning

confidence: 99%

“…In a recent study by Hezam et al, the nanostructured CeO 2 with controlled oxygen vacancies could be efficient for the photoreduction of CO 2 into CH 3 OH [41]. Moreover, CeO 2 has narrower E g (2.8~3.1 eV) than TiO 2 and ZnO, exhibiting an n-type character and representing a more stable ceramic oxide with potential applications in various photocatalytic reactions, including water splitting [42], organic transformation reactions [43], and pollutant degradation [44]. Moreover, the coupling with p-type oxides such as bismuth oxides (Bi 2 O 3 ) showed a significant photocatalytic performance in dye degradation [37,45], self-cleaning coatings [46], and NO oxidation [47].…”

Section: Introductionmentioning

confidence: 99%

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Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

et al. 2022

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Carbon dioxide (CO2) photoreduction into renewable fuels over semiconductor photocatalysts has emerged as a green and sustainable alternative for energy production. Consequently, tremendous efforts are being performed to develop robust and sustainable photocatalysts. Therefore, visible-light active nanocomposite photocatalysts composed of 5.0–20.0 wt.% bismuth oxide (Bi2O3) and cerium oxide (CeO2) were synthesized by a sol-gel-based process. The prepared nanocomposites were evaluated for the promoted photocatalytic reduction of CO2 into methanol (CH3OH). Various characterizations of the obtained photocatalysts exposed an outstanding development of crystalline structure, morphology, and surface texture due to the presence of Bi2O3. Moreover, the absorbance of light in the visible regime was improved with enhanced charge separation, as revealed by the exploration of optical response, photoluminescence, and photocurrent measurements. The overall bandgap calculations revealed a reduction to 2.75 eV for 15% Bi2O3/CeO2 compared to 2.93 eV for pure CeO2. Moreover, the adjusted 2.8 g L−1 dose of 15% Bi2O3/CeO2 selectively produced 1300 μmol g−1 CH3OH after 9 h of visible light irradiation. This photocatalyst also exhibits bearable reusability five times. The improved progression of 15% Bi2O3/CeO2 is denoted by significant charge separation as well as enhanced mobility. This study suggests the application of metal oxide-based heterojunctions for renewable fuel production under visible light.

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“…Figure 11 There are no other peaks that occur throughout the degradation process, such as those of the Ndeethylated intermediates of Rh B, implying that Rh B has been mineralized to a high level [33]. The effectiveness of Si-NWs/CeO 2 is evaluated in comparison with the literature [34][35][36][37]. According to •− , h + , e − and • OH contribute to the Rh B degradation of (Fig.…”

Section: Photocatalysismentioning

confidence: 99%

Facile CeO 2 Nanoparticles Deposition on Si-Nanowires and Application to the Rhodamine B Photodegradation Under Visible Light

Derkaoui

Hadjersi²,

Boukhouidem

et al. 2023

Preprint

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The photocatalysis is a promising strategy for the water purification. In this work, Cerium dioxide Nano-particles (CeO2-NPs) were deposited by chemical electroless deposition on silicon nanowires (Si-NWs) elaborated by metal-assisted chemical etching. The obtained thin films were characterized by the combined SEM / EDX analysis. The cubic CeO2 phase was identified by X-ray diffraction (XRD) and characterized by photoluminescence (PL) while the chemical states of elements were analyzed by X-ray photoelectron spectroscopy (XPS). The optical gap (2.63–2.87 eV) were determined by UV–Vis spectrophotometry, in conformity with the white-yellow coloration. The Si-NWs/CeO2NPs Nano-composites were successfully applied as photocatalyst for the oxidation of Rhodamine B (Rh B), a recalcitrant dye under visible irradiation. The Si-NWs/CeO2 films showed a higher photocatalytic performance with a quasi total discoloration within 75 min against only 67.5% for Si-NWs. The radical trapping tests showed that the electrons (e−), •OH, O2•− and holes (h+) are mainly involved in the Rh B degradation; a reaction mechanism was suggested and discussed. This work provides new idea to develop an efficient photocatalyst to eliminate emerging pollutants from aquatic environment.

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Fabrication of a Z-scheme CeO2/Bi2O4 heterojunction photocatalyst with superior visible-light responsive photocatalytic performance

Cited by 33 publications

References 63 publications

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

Facile CeO 2 Nanoparticles Deposition on Si-Nanowires and Application to the Rhodamine B Photodegradation Under Visible Light

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Fabrication of a Z-scheme CeO2/Bi2O4 heterojunction photocatalyst with superior visible-light responsive photocatalytic performance

Cited by 33 publications

References 63 publications

Nano spinel NiAl2O4: structure, optical and photocatalytic performance evaluation and optimization

Nano spinel NiAl2O4: structure, optical and photocatalytic performance evaluation and optimization

Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

Facile CeO 2 Nanoparticles Deposition on Si-Nanowires and Application to the Rhodamine B Photodegradation Under Visible Light

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Product

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Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization