Fabrication of a La-doped BiVO4@CN step-scheme heterojunction for effective tetracycline degradation with dual-enhanced molecular oxygen activation

Jin, Zhouzheng; Zhang, Yiming; Liú, Dan; Ding, Hui; Mamba, Bhekie B.; Kuvarega, Alex T.; Gui, Jianzhou

doi:10.1016/j.seppur.2021.119224

Cited by 33 publications

(13 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, a greater generation of ROS is considered as the main reason for the enhanced antibacterial properties of the PDA-rGO/BiVO4 composite under light irradiation. This is in agreement with previous studies, which showed that modified BiVO4 can produce more ROS with high oxidation capacity, which is beneficial to the improvement of photocatalytic activity [35,36].…”

Section: Ros Productionsupporting

confidence: 93%

Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite

Li¹,

Gao²,

Qu³

et al. 2022

IJMS

View full text Add to dashboard Cite

In this study, a photocatalytic antibacterial composite of polydopamine-reduced graphene oxide (PDA-rGO)/BiVO4 is prepared by a hydrothermal self-polymerization reduction method. Its morphology and physicochemical properties are characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared (FT-IR), and X-ray diffraction (XRD). The results indicate that BiVO4 particles are evenly distributed on the rGO surface. Escherichia coli (E. coli) MG1655 is selected as the model bacteria, and its antibacterial performance is tested by flat colony counting and the MTT method under light irradiation. PDA-rGO/BiVO4 inhibits the growth of E. coli under both light and dark conditions, and light significantly enhances the bacteriostasis of PDA-rGO/BiVO4. A combination of BiVO4 with PDA-rGO is confirmed by the above characterization methods as improving the photothermal performance under visible light irradiation. The composite possesses enhanced photocatalytic antibacterial activity. Additionally, the photocatalytic antibacterial mechanism is investigated via the morphology changes in the SEM images of MG1655 bacteria, 2′,7′-dichlorofluorescein diacetate (DCFH-DA), the fluorescence detection of the reactive oxygen species (ROS), and gene expression. These results show that PDA-rGO/BiVO4 can produce more ROS and lead to bacterial death. Subsequently, the q-PCR results show that the transmembrane transport of bacteria is blocked and the respiratory chain is inhibited. This study may provide an important strategy for expanding the application of BiVO4 in biomedicine and studying the photocatalytic antibacterial mechanism.

show abstract

Section: Ros Productionsupporting

confidence: 93%

Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite

Li¹,

Gao²,

Qu³

et al. 2022

IJMS

View full text Add to dashboard Cite

show abstract

“…The XRD patterns of BiVO 4 , La-BiVO 4 /O-doped g-C 3 N 4 powder, and NFs are comparatively shown in Figure a. It is found that the prepared BiVO 4 , La-BiVO 4 , and La-BiVO 4 -based compounds all have the diffraction characteristics of monoclinic bismuth vanadate (m-BiVO 4 , referring to JCPDS card No.14-0688); no trace of tetragonal bismuth vanadate ( t -BiVO 4 ) was detected at the current measuring level . It is worth noting that the m-BiVO 4 compounds typically exhibit much better photocatalytic performances than all of the other BiVO 4 phases, which makes our following designs much significant.…”

Section: Resultsmentioning

confidence: 94%

Construction of an La-BiVO₄/O-Doped g-C₃N₄ Heterojunction Photocatalyst Embedded in Electrospinning Nanofibers

et al. 2023

View full text Add to dashboard Cite

BiVO 4 has been widely used in the field of photocatalysis due to its nontoxic and moderate band gap. However, single BiVO 4 has the disadvantages of a high recombination rate of photogenerated carriers and weak response to visible light, inhibiting its photocatalytic applications. To explore viable solutions, a hybrid material composed of lanthanum-doped bismuth vanadate (La-BiVO 4 ) and oxygen-doped porous graphite carbon nitride (O-doped g-C 3 N 4 ), i.e., La-BiVO 4 /O-doped g-C 3 N 4 powder, was prepared by a facile hydrothermal reaction and low-temperature calcination. Then, the powder was loaded on polyacrylonitrile nanofibers (NFs) through the electrospinning fiber technique. Various surface science characterizations, including transmission electron microscopy and nitrogen absorption and desorption analysis, confirmed the successful synthesis of a mesoporous heterojunction material. The La 3+ -doping as well as the porous morphologies and larger specific surface area of the O-doped g-C 3 N 4 ultimately improve the photocatalytic abilities via a proposed Zscheme heterojunction mechanism. The roles of La 3+ -doping and morphology modification in promoting the separation of the photogenerated carriers and broadening the optical absorption range were experimentally discussed. The RhB degradation experiment indicated that the La-BiVO 4 /O-doped g-C 3 N 4 powder has excellent photocatalytic activity, which is about 2.85 and 2 times higher than that of the pure BiVO 4 and O-doped g-C 3 N 4 , respectively. Meanwhile, the La-BiVO 4 /O-doped g-C 3 N 4 NF shows good stability and recoverability after a 10-cycle testing. Such a hybrid photocatalyst with a proposed Z-scheme heterojunction mechanism and good plasticity might pave a feasible way to fabricate a new library of photocatalysts.

show abstract

“…Overuse of tetracycline, one of the most widely used antibiotics for human health, is harmful to human health, owing to the emergence of drug-resistant bacteria and clinical side effects on the kidneys and liver. − Thus, it is very important to remove these contaminants from the aquatic environment with a cost-efficient and practical approach. The removal of tetracycline hydrochloride (TH) from aqueous solution was used to assess the photocatalytic activities of the title complexes.…”

Section: Resultsmentioning

confidence: 99%

Decomposition–Reassembly Synthesis of a Silverton-Type Polyoxometalate 3D Framework: Semiconducting Properties and Photocatalytic Applications

et al. 2022

View full text Add to dashboard Cite

Polyoxometalate-based all-inorganic three-dimensional (3D) frameworks have recently attracted attention as a unique class of materials due to their unique physicochemical properties and a wide field of application with excellent prospects. We herein synthesized a novel all-inorganic 3D framework material based on cobalt-substituted Silverton-type polyoxometalate,) and Co(NO 3 ) 2 •6H 2 O as starting materials in a hydrothermal reaction via a decomposition−reassembly route together with the rational adjustment of pH values. Co 9 W 10 has been structurally characterized using single-crystal X-ray diffraction. Photocurrent response, band-gap (E g ) value, and the VB-XPS spectrum have been measured to reveal the semiconducting property of Co 9 W 10 . Furthermore, we synthesized x% PTh/Co 9 W 10 composites (PTh = polythiophene, x = 0.5, 1, 2, 5) for photodegradation of tetracycline hydrochloride (TH) to evaluate the photocatalytic activities of title composites. Due to the optimal molar ratio of hybrids and matching energy levels, 2% PTh/Co 9 W 10 composites show the best photocatalytic activities among these composites.

show abstract

Fabrication of a La-doped BiVO4@CN step-scheme heterojunction for effective tetracycline degradation with dual-enhanced molecular oxygen activation

Cited by 33 publications

References 71 publications

Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite

Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite

Construction of an La-BiVO₄/O-Doped g-C₃N₄ Heterojunction Photocatalyst Embedded in Electrospinning Nanofibers

Decomposition–Reassembly Synthesis of a Silverton-Type Polyoxometalate 3D Framework: Semiconducting Properties and Photocatalytic Applications

Contact Info

Product

Resources

About

Fabrication of a La-doped BiVO4@CN step-scheme heterojunction for effective tetracycline degradation with dual-enhanced molecular oxygen activation

Cited by 33 publications

References 71 publications

Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite

Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite

Construction of an La-BiVO4/O-Doped g-C3N4 Heterojunction Photocatalyst Embedded in Electrospinning Nanofibers

Decomposition–Reassembly Synthesis of a Silverton-Type Polyoxometalate 3D Framework: Semiconducting Properties and Photocatalytic Applications

Contact Info

Product

Resources

About

Construction of an La-BiVO₄/O-Doped g-C₃N₄ Heterojunction Photocatalyst Embedded in Electrospinning Nanofibers