Facile synthesis of hierarchically nanostructured bismuth vanadate: An efficient photocatalyst for degradation and detection of hexavalent chromium

Jaihindh, Dhayanantha Prabu; Thirumalraj, Balamurugan; Chen, Shen‐Ming; Balasubramanian, Paramasivam; Fu, Yen‐Pei

doi:10.1016/j.jhazmat.2019.01.017

Cited by 74 publications

(23 citation statements)

References 71 publications

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“…Various applications of BiVO 4 has been well studied in water splitting, sensors, pollutant degradation etc. (Ma et al 2019; Vo et al 2019; Prado et al 2019; Jaihindh et al 2019; Hassan et al 2019; Chomkitichai et al 2019). Recently, there has been growing interest in biological applications of BiVO 4 .…”

Section: Introductionmentioning

confidence: 99%

Phytosynthesis of BiVO4 nanorods using Hyphaene thebaica for diverse biomedical applications

et al. 2019

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Biosynthesis of bismuth vanadate (BiVO4) nanorods was performed using dried fruit extracts of Hyphaene thebaica as a cost effective reducing and stabilizing agent. XRD, DRS, FTIR, zeta potential, Raman, HR-SEM, HR-TEM, EDS and SAED were used to study the main physical properties while the biological properties were established by performing diverse assays. The zeta potential is reported as − 5.21 mV. FTIR indicated Bi–O and V–O vibrations at 640 cm−1 and 700 cm−1/1120 cm−1. Characteristic Raman modes were observed at 166 cm−1, 325 cm−1 and 787 cm−1. High resolution scanning and transmission electron micrographs revealed a rod like morphology of the BiVO4. Bacillus subtilis, Klebsiella pneumonia, Fusarium solani indicated highest susceptibility to the different doses of BiVO4 nanorods. Significant protein kinase inhibition is reported for BiVO4 nanorods which suggests their potential anticancer properties. The nanorods revealed good DPPH free radical scavenging potential (48%) at 400 µg/mL while total antioxidant capacity of 59.8 µg AAE/mg was revealed at 400 µg/mL. No antiviral activity is reported on sabin like polio virus. Overall excellent biological properties are reported. We have shown that green synthesis can replace well established processes for synthesizing BiVO4 nanorods.

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Section: Introductionmentioning

confidence: 99%

Phytosynthesis of BiVO4 nanorods using Hyphaene thebaica for diverse biomedical applications

et al. 2019

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“…The characteristic spin‐orbit splitting of V 2p 3/2 and V 2p 1/2 signals is observed at 516.74 and 524.36 eV, respectively, as shown in Figure d . Each of the V 2p 3/2 peaks has two components, V 5+ and V 4+ , at lower binding energy in the BOC/BVO/g‐CN‐15 . Figure e shows two strong peaks at 197.86 and 199.48 eV ascribed to Cl 2p 3/2 and Cl 2p 1/2 , respectively, which are associated with Cl − in BiOCl.…”

Section: Resultsmentioning

confidence: 91%

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

et al. 2020

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have reportedb ismuth oxyhalides (BiOX, X = Cl, I, Br) [12] and their heterojunctions in photocatalytic water splitting, owing to their unique physicochemical properties. [13] Moreover,B iOCl/ BiVO 4 p-n heterojunctions have been reported to enhance the photocatalytic activity and pollutant degradationu nder visiblelight irradiation. [11,14] In ah eterojunction structure, the photocatalytic materials strictly require narrow band gaps, which facilitatev isible-light absorption and proper energy level matching, which in turn facilitates good charget ransfer along with improved oxidation and reductiona bility. [15] Accordingly,t ernary heterojunctions can shown otable improvements through the synergistic effect of the multicomponent,w hich gives rise to the efficient separation of photogenerated electron-hole pairs. Buildingaheterostructure between semiconductors is an encouraging technology to improve photocatalytic activity. [16] Heretofore, numerous designed ternary heterojunction systems have been reported and demonstrated clearly enhanced photocatalytic activity compared with binary systems. [16, 17] Therefore, designing ag -C 3 N 4 -based heterojunction is ag ood approach to enhancing the photocatalytic activity of other materials. [18] The metalfree chemical nature, chemical stability,t unable electronic structure, more abundanta nd inexpensive components,a s well as the more appropriate positionofthe top of the valence band and bottom of the conduction band for photocatalytic water splitting have led to g-C 3 N 4 being considered for the development of heterojunctionp hotocatalysts. [19] Since then, g-C 3 N 4 -based composites, such as g- [18b] have been reported.T he photocatalytic activity of heterojunction materials can be explained in water splitting throughe xamination of suitable properties such as visible-light activity,e lectron-hole pair recombination, overpotential of the heterojunction materials, and the stability in the electrolyte solution.Another issue with hierarchical structured materials is that the synthesis is generally difficult,e xpensive, and requirestoxic templates or surfactants as well as careful control of conditions. The increasingl evel of chemical hazards is as erious problem and various environmental regulations need to be complied with. [24] Therefore, there is an ecessity forr eplacing traditional and hazardous organic solvents in chemical routes of materials synthesis to enable as tep towards more sustainable green chemistry. [25] Deep eutectic solvents (DESs) represent an ewer,n ontoxic,i nexpensive class of alternative mixed solvents ystems, formed upon the mixing of varioush ydrogenbondings alts and charge-neutral species, tof orm al ow-melting liquid that is significantly lower melting than that of the two single components andi si deal around room temperature. [26] DESs are coined as green solvents owing to their properties of high viscosity,c onductivity,s urface tension,a nd biodegradability.A saresult, DESs open new and unrivalled chances to improve the sustainab...

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“…The addition of BiVO 4 enhances the electrocatalytic activity for Cr(VI) detection attributable to the high surface area of the prepared catalyst and to its high crystallinity. Besides, the prepared sensor displayed great electrocatalytic activity, good stability, recyclability (4 times), wide linear range (0.52–13,754 µg·L −1 ) with the ability to detect Cr(VI) at the level of 0.182 µg·L −1 [ 104 ]. Nanocomposite catalysts are a versatile and powerful tool used for Cr(VI) reduction.…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

Recent Advances in Electrochemical Monitoring of Chromium

Hilali

Mohammadi

Amine

et al. 2020

Sensors

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The extensive use of chromium by several industries conducts to the discharge of an immense quantity of its various forms in the environment which affects drastically the ecological and biological lives especially in the case of hexavalent chromium. Electrochemical sensors and biosensors are useful devices for chromium determination. In the last five years, several sensors based on the modification of electrode surface by different nanomaterials (fluorine tin oxide, titanium dioxide, carbon nanomaterials, metallic nanoparticles and nanocomposite) and biosensors with different biorecognition elements (microbial fuel cell, bacteria, enzyme, DNA) were employed for chromium monitoring. Herein, recent advances related to the use of electrochemical approaches for measurement of trivalent and hexavalent chromium from 2015 to 2020 are reported. A discussion of both chromium species detections and speciation studies is provided.

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Facile synthesis of hierarchically nanostructured bismuth vanadate: An efficient photocatalyst for degradation and detection of hexavalent chromium

Cited by 74 publications

References 71 publications

Phytosynthesis of BiVO4 nanorods using Hyphaene thebaica for diverse biomedical applications

Phytosynthesis of BiVO4 nanorods using Hyphaene thebaica for diverse biomedical applications

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

Recent Advances in Electrochemical Monitoring of Chromium

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