Hydrothermal synthesis of cotton-based BiVO<sub>4</sub>/Ag composite for photocatalytic degradation of C.I. Reactive Black 5

Qu, Jiangang; Qian, Jiaqi; Wu, Mengtao; Mao, Qinghui

doi:10.1039/d0ra07588d

Cited by 10 publications

(6 citation statements)

References 35 publications

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“…These four peaks can also be recognized in the XRD pattern of cotton-RGO-AgNP composite fiber (green curve). In addition, five more sharp diffraction peaks appear at 38.2 • , 44.3 • , 64.5 • , 77.5 • and 81.5 • in this pattern, perfectly coinciding with the XRD peaks of elemental silver nanoparticles (blue curve), which belong to the crystallographic planes of (111), ( 200), ( 220), (311) and (222) for face-centered cubic silver (JCPDS: 65-2871), respectively [23,24]. It is well known that RGO has a typical peak at~24 • and there is indeed a wide and weak XRD peak at 23.5 • for the purchased RGO powder (red curve) [24,25].…”

Section: Materials Characterizationssupporting

confidence: 59%

“…XRD characterizations were first implemented to find out the crystal textures of corresponding materials. Commercial pristine cotton yarn consists of polymer chains of cellulose, which is arranged into a certain crystalline phase, thus rendering XRD peaks centered at 14.8 • , 16.7 • , 22.9 • and 34.3 • (black curve in Figure 2) [22,23]. These four peaks can also be recognized in the XRD pattern of cotton-RGO-AgNP composite fiber (green curve).…”

Section: Materials Characterizationsmentioning

confidence: 96%

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Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

et al. 2021

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In this study, we report on the rational design and facile preparation of a cotton-reduced graphene oxide-silver nanoparticle (cotton-RGO-AgNP) hybrid fiber as an electrode for the building of a flexible fiber-shaped supercapacitor (FSSC). It was adequately characterized and found to possess a well-defined core−shell structure with cotton yarn as a core and a porous RGO-AgNP coating as a shell. Thanks to the unique morphological features and low electrical resistance (only 2.3 Ω·cm−1), it displayed attractive supercapacitive properties. When evaluated in a three-electrode setup, this FSSC electrode delivered the highest linear and volumetric specific capacitance of up to ca. 12.09 mF·cm−1 and ca. 9.67 F·cm−3 with a satisfactory rate capability as well as a decent cycling stability. On the other hand, an individual parallel symmetric FSSC cell constructed by this composite fiber fulfilled the largest linear and volumetric specific capacitance of ca. 1.67 mF·cm−1 and ca. 0.67 F·cm−3 and offered the maximum energy density, as high as ca. 93.1 μWh·cm−3, which outperformed a great number of graphene- and textile yarn-based FSSCs. Impressively, bending deformation brought about quite a limited effect on its electrochemical behaviors and almost no capacitance degradation took place during the consecutive charge/discharge test for over 10,000 cycles. Consequently, these remarkable performances suggest that the currently developed cotton-RGO-AgNP fiber has considerable application potential in flexible, portable and wearable electronics.

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Section: Materials Characterizationssupporting

confidence: 59%

Section: Materials Characterizationsmentioning

confidence: 96%

Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

et al. 2021

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“…The fabrication of BiVO 4 was prepared with reference to our previous work [ 42 ]. The synthetic precursor solution, with a pH of 7, contained Bi(NO 3 ) 3 (2.911 g), EDTA-2Na (2.500 g), and HNO 3 (10 mL); then, the NaVO 3 (0.732 g) solution was dropped under stirring conditions.…”

Section: Methodsmentioning

confidence: 99%

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

Li¹,

Gao²,

Qu³

et al. 2022

IJMS

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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.

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“…However, due to the high recombination rate of photogenerated electron and holes, pure BiVO 4 shows low photocatalytic efficiency as well as low recyclability. Therefore, loading BiVO 4 on conductive flexible materials has become a research hotspot, such as: M‐BiVO 4 /WO 3 /ITO‐Mica, [16] FTO‐BiVO 4 , [17] Ag/BiVO 4 /Cotton‐K, [18] Co 3 O 4 ‐BiVO 4 /g‐C 3 N 4 , [19] BiVO 4 /BiPO 4 /GO, [20] BiVO 4 ‐GO‐TiO 2 ‐PaNI [21] and BiVO 4 /FeVO 4 @rGO [22]…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15] However, due to the high recombination rate of photogenerated electron and holes, pure BiVO 4 shows low photocatalytic efficiency as well as low recyclability. Therefore, loading BiVO 4 on conductive flexible materials has become a research hotspot, such as: M-BiVO 4 /WO 3 /ITO-Mica, [16] FTO-BiVO 4 , [17] Ag/BiVO 4 /Cotton-K, [18] Co 3 O 4 -BiVO 4 /g-C 3 N 4 , [19] BiVO 4 /BiPO 4 /GO, [20] BiVO 4 -GO-TiO 2 -PaNI [21] and BiVO 4 /FeVO 4 @rGO. [22] Graphene is a relatively hot two-dimensional carbon material in recent years, [23][24] which has high conductivity (106 S/m) [25] and good electron mobility (42 × 10 5 cm 2 /V • S).…”

Section: Introductionmentioning

confidence: 99%

Preparation of RGO film based BiVO₄ (040) composites with photocatalytic properties

Qian

Cao

et al. 2022

Zeitschrift anorg allge chemie

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Graphene oxide (GO) film was modified by silane coupling agent KH‐560, then bismuth vanadate (BiVO4) was successfully loaded on the modified GO film via hydrothermal method to obtain reduced graphene oxide (RGO) film based BiVO4 composite. The effects of hydrothermal reaction time on BiVO4 morphology and photocatalytic properties were investigated by scanning electron microscopy (SEM), X‐ray diffraction pattern (XRD), ultraviolet visible light absorption spectroscopy (UV‐vis) and photocatalytic activity. The results show that BiVO4 is a porous structure growing towards (040) crystal plane on the composite, and when the synthesis time is 6 h, the degradation rate for Reactive Black 5 by the composite can reach 95 % within 90 min. Furthermore, the composite prepared at the optimal time was characterized by transmission electron microscope (TEM), energy dispersive X‐ray spectroscopy (EDS) and X‐ray photoelectron spectroscopy (XPS). The microphysical process of the separation and combination of photogenerated electron hole pairs was successfully demonstrated by the variations of photoinduced current density with time (i‐t curve) and electrochemical impedance spectroscopies (EIS). Finally, the photocatalytic mechanism was proposed by free radical capture experiment.

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Hydrothermal synthesis of cotton-based BiVO₄/Ag composite for photocatalytic degradation of C.I. Reactive Black 5

Abstract: BiVO4/Ag/cotton-K composite material exhibited excellent photocatalytic activity and recyclability, and the photodegradation mechanism of RB5 by BiVO4/Ag/cotton-K was also proposed.

Cited by 10 publications

References 35 publications

Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

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

Preparation of RGO film based BiVO₄ (040) composites with photocatalytic properties

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Hydrothermal synthesis of cotton-based BiVO4/Ag composite for photocatalytic degradation of C.I. Reactive Black 5

Abstract: BiVO4/Ag/cotton-K composite material exhibited excellent photocatalytic activity and recyclability, and the photodegradation mechanism of RB5 by BiVO4/Ag/cotton-K was also proposed.

Cited by 10 publications

References 35 publications

Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

Surface Modification of Commercial Cotton Yarn as Electrode for Construction of Flexible Fiber-Shaped Supercapacitor

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

Preparation of RGO film based BiVO4 (040) composites with photocatalytic properties

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Hydrothermal synthesis of cotton-based BiVO₄/Ag composite for photocatalytic degradation of C.I. Reactive Black 5

Preparation of RGO film based BiVO₄ (040) composites with photocatalytic properties