Perovskite LaNiO3/TiO2 step-scheme heterojunction with enhanced photocatalytic activity

Chen, Chen; Zhou, Jialing; Geng, Junfeng; Bao, Ruiyu; Wang, Zhonghua; Xia, Jianxin; Li, Hua

doi:10.1016/j.apsusc.2019.144287

Cited by 87 publications

(37 citation statements)

References 58 publications

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“…We synthesized g-C 3 N 4 nanosheets based on the method described in the previous report [21]. Firstly, 10 g of melamine was placed in a covered crucible and heated at 550 • C for 4 h with a heating rate of 2 • C per minute in air.…”

Section: Synthesis Of G-c 3 N 4 Nanosheetsmentioning

confidence: 99%

“…Among them, a p-type semiconductor, LaNiO 3 , has promising applications in the field of photodegradation of organic contaminants and in hydrogen production benefitting from suitable band gap and electronic magnetic property. Many photocatalytic composites were successfully prepared, such as LaNiO 3 /ZnIn 2 S 4 [ 18 ], LaNiO 3 /SnS 2 [ 19 ], LaNiO 3 /CdS [ 20 ] and LaNiO 3 /TiO 2 [ 21 ], which have made some progress in hydrogen production, dye degradation and tetracycline hydrochloride removal. Besides, as a semiconductor material with good photosensitivity, silver bromide (AgBr) is easy to synthesize, possesses stable physical and chemical properties, a narrow band gap, and outstanding renewability [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

et al. 2020

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Promoting the separation of photogenerated charges and enhanced optical absorption capacity is the main means to modify photocatalytic capacities to advance semiconductor photocatalyst applications. For the first time, a novel ternary photocatalyst for dual Z-scheme system AgBr/LaNiO3/g-C3N4 (ALG) was prepared via a modest ultrasound-assisted hydrothermal method. The results indicated that LaNiO3 nanoballs and AgBr nanoparticles were successfully grown on the surface of g-C3N4 nanosheets. A dual Z-scheme photocatalytic reaction system could be constructed based on the energy band matching within AgBr, LaNiO3 and g-C3N4. Metallic Ag during the photocatalytic reaction process acted as the active electrons transfer center to enhance the photocatalytic charge pairs separation. The chemical composition of ALG was optimized and composites with 3% AgBr, 30% LaNiO3 and 100% g-C3N4 which was noted as 3-ALG displayed the best photocatalytic performance. A total of 92% of norfloxacin (NOR) was photodegraded within two hours over ALG and the photodegradation rate remained >90% after six cycles. The main active species during the degradation course were photogenerated holes, superoxide radical anion and hydroxyl radical. A possible mechanism was proposed based on the synergetic effects within AgBr, LaNiO3 and g-C3N4. This work would offer a credible theoretical basis for the application of dual Z-scheme photocatalysts in environment restoration.

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Section: Synthesis Of G-c 3 N 4 Nanosheetsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

et al. 2020

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“…The influence of 300 W Vis light source on the MO photocatalytic removal was tested using LaNiO 3 /TiO 2 S-scheme [ 77 ], ZnFe 2 O 4 /SnS 2 p-n [ 78 ] and WO 3 /g-C 3 N 4 Z-scheme [ 79 ] heterostructures. ZnFe 2 O 4 /SnS 2 heterostructure obtained by the solvothermal method has the lowest energy consumption being able to remove 99% of MO (50 mg/L) in just 20 min.…”

Section: Photocatalytic Organic Pollutants Removal By Heterostructmentioning

confidence: 99%

“…Z-scheme (PVPbiochar@ZnF 2 O 4 /BiOBr [ 100 ]) and S-scheme (LaNiO 3 /TiO 2 [ 77 ]) mechanisms were used to evaluate the CIP photocatalytic removal under Vis light (300 W). The PVPbiochar@ZnF 2 O 4 /BiOBr heterostructure with sheets-like morphology was obtained by the solvothermal method and contains tetragonal BiOBr and spinel ZnFe 2 O 4 .…”

Section: Photocatalytic Organic Pollutants Removal By Heterostructmentioning

confidence: 99%

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

Eneşca

Andronic

2020

Nanomaterials

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The diversification of pollutants type and concentration in wastewater has underlined the importance of finding new alternatives to traditional treatment methods. Advanced oxidation processes (AOPs), among others, are considered as promising candidate to efficiently remove organic pollutants such as dyes or pharmaceutical active compounds (PhACs). The present minireview resumes several recent achievements on the implementation and optimization of photoactive heterostructures used as photocatalysts for dyes and PhACs removal. The paper is focused on various methods of enhancing the heterostructure photocatalytic properties by optimizing parameters such as synthesis methods, composition, crystallinity, morphology, pollutant concentration and light irradiation.

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“…For instance, Li and coworkers [16] fabricated TiO 2 /MoS 2 nanoheterojunctions by electrospinning and hydrothermal method and demonstrated that as-prepared samples exhibited super photocatalytic hydrogen evolution activity of 171.24 μmol•g −1 •L −1 . Chen et al [17] also reported that coupling LaNiO 3 with TiO 2 would remarkably enhance the photocatalytic activity of TiO 2 and explained that the heterojunction formed between them played an important role in improving the photocatalytic performance. Recently, TiO 2 -C 3 N 4 [18], CdS/TiO 2 [19], TiO 2 /NiO [20], and TiO 2 / Cu 2 O [21] had been reported and shown enhanced photocatalytic performance for organic pollutant degradation and H 2 evaluation.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Photocatalytic Performances of WO₃/TiO₂ Composite Nanofibers

Han

Yao

et al. 2020

Journal of Chemistry

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The use of sunlight for photocatalytic oxidation is an ideal strategy, but it is limited by factors such as insufficient light absorption intensity of the photocatalyst and easy recombination of photogenerated electron holes. TiO2 is favored by researchers as an environment-friendly catalyst. In this paper, TiO2 is combined with WO3 to obtain a nanofiber with excellent catalytic performance under sunlight. The WO3/TiO2 composite nanofibers were synthesized by using the electrospinning method. The X-ray diffraction (XRD) analysis indicated that WO3 was successfully integrated onto the surface of TiO2. The photodegradation performance and photocurrent analysis of the prepared nanofibers showed that the addition of WO3 really improved the photocatalytic performance of TiO2 nanofibers, methylene blue (MB) degradation rate increased from 72% to 96%, and 5% was the optimal composite mole percentage of W to Ti. The scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectra (UV-Vis DRS), and Brunauer-Emmett-Teller (BET) analysis further characterized the properties of 5% WO3/TiO2 nanofibers. The H2 generation rate of 5% WO3/TiO2 nanofibers was 107.15 μmol·g−1·h−1, in comparison with that of TiO2 nanofibers (73.21 μmol·g−1·h−1) under the same condition. The 5% WO3/TiO2 produced ·OH under illumination, which played an important role in the MB degradation. Also, the enhanced photocatalytic mechanism was also proposed based on the detailed analysis of the band gap and the active species trapping experiment. The results indicated that the effective separation of Z-scheme photogenerated electron-hole pairs and transfer system constructed between TiO2 and WO3 endowed the excellent photocatalytic activity of 5% WO3/TiO2 nanofibers.

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Perovskite LaNiO3/TiO2 step-scheme heterojunction with enhanced photocatalytic activity

Cited by 87 publications

References 58 publications

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

Preparation and Photocatalytic Performances of WO₃/TiO₂ Composite Nanofibers

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Perovskite LaNiO3/TiO2 step-scheme heterojunction with enhanced photocatalytic activity

Cited by 87 publications

References 58 publications

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

Preparation and Photocatalytic Performances of WO3/TiO2 Composite Nanofibers

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Preparation and Photocatalytic Performances of WO₃/TiO₂ Composite Nanofibers