Highly efficient photocatalytic reduction of Cr(VI) by bismuth hollow nanospheres

Qin, Fan; Wang, Runming; Li, Guangfang; Tian, Fan; Zhao, Hongbin; Cheng, Gang

doi:10.1016/j.catcom.2013.07.039

Cited by 82 publications

(26 citation statements)

References 27 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…X-ray diffraction patterns (D8 Advance diffractometer, Bruker Corporation, Billerica, MA) were matched with library of diffraction patterns to determine molecular identity as bismuth(0) 12 , 20 . Fourier transform infrared spectroscopy (FTIR) was performed on a Mattson Genesis 3025 FTIR spectrometer to verify that DDT was present on the bismuth nanocrystals.…”

Section: Methodsmentioning

confidence: 99%

Dual-modality, fluorescent, PLGA encapsulated bismuth nanoparticles for molecular and cellular fluorescence imaging and computed tomography

et al. 2014

View full text Add to dashboard Cite

Reports of molecular and cellular imaging using computed tomography (CT) are rapidly increasing. Many of these reports use gold nanoparticles. Bismuth has similar CT contrast properties to gold while being approximately 1000-fold less expensive. Herein we report the design, fabrication, characterization, and CT and fluorescence imaging properties of a novel, dual modality, fluorescent, polymer encapsulated bismuth nanoparticle construct for computed tomography and fluorescence imaging. We also report on cellular internalization and preliminary in vitro and in vivo toxicity effects of these constructs. 40 nm bismuth(0) nanocrystals were synthesized and encapsulated within 120 nm Poly(DL-lactic-co-glycolic acid) (PLGA) nanoparticles by oil-in-water emulsion methodologies. Coumarin-6 was co-encapsulated to impart fluorescence. High encapsulation efficiency was achieved ∼ 70% bismuth w/w. Particles were shown to internalize within cells following incubation in culture. Bismuth nanocrystals and PLGA encapsulated bismuth nanoparticles exhibited >90% and >70% degradation, respectively, within 24 hours in acidic, lysosomal environment mimicking media and both remained nearly 100% stable in cytosolic/extracellular fluid mimicking media. μCT and clinical CT imaging was performed at multiple X-ray tube voltages to measure concentration dependent attenuation rates as well as to establish the ability to detect the nanoparticles in an ex vivo biological sample. Dual fluorescence and CT imaging is demonstrated as well. In vivo toxicity studies in rats revealed neither clinically apparent side effects nor major alterations in serum chemistry and hematology parameters. Calculations on minimal detection requirements for in vivo targeted imaging using these nanoparticles are presented. Indeed, our results indicate that these nanoparticles may serve as a platform for sensitive and specific targeted molecular CT and fluorescence imaging.

show abstract

Section: Methodsmentioning

confidence: 99%

Dual-modality, fluorescent, PLGA encapsulated bismuth nanoparticles for molecular and cellular fluorescence imaging and computed tomography

et al. 2014

View full text Add to dashboard Cite

show abstract

“…As an effective approach, photocatalysis and adsorption have been extensively employed in water treatment, where a variety of advanced nanomaterials have been studied as promising photocatalysts and adsorbents. Bismuth-based nanostructures, in particular, have attracted considerable attention by virtue of their improved properties and extensive applications in removing organic dyes and heavy metal ions [3][4][5][6][7]. During the past few years, an increasing interest has been focused on the fabrication of bismuth-related nanomaterials with tailored morphology and pattern, owing to the strong correlation between the property and performance and their sizes, shapes, and structures [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

BiOX (X=Cl, Br, I) nanostructures: Mannitol-mediated microwave synthesis, visible light photocatalytic performance, and Cr(VI) removal capacity

Qin

Wang

et al. 2013

Journal of Colloid and Interface Science

Self Cite

117

View full text Add to dashboard Cite

“…BiFeO 3 had a relatively high visible light absorption capacity, and the edge of its absorption region was ca. 775 nm [48]. Figure 7c shows that CNB has a wider photo-response range than that of the pure g-C 3 N 4 due to the addition of BiFeO 3 and that the photo-response range of the CNBT composite is further broadened after adding the CNTs.…”

Section: Resultsmentioning

confidence: 99%

Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C3N4/BiFeO3/Carbon Nanotubes Ternary Composites

Huo

Wang

et al. 2019

IJERPH

View full text Add to dashboard Cite

A novel graphite-phase carbon nitride (g-C3N4)/bismuth ferrite (BiFeO3)/carbon nanotubes (CNTs) ternary magnetic composite (CNBT) was prepared by a hydrothermal synthesis. Using this material, Cr(VI) and methylene blue (MB) were removed from wastewater through synergistic adsorption and photocatalysis. The effects of pH, time, and pollutant concentration on the photocatalytic performance of CNBT, as well as possible interactions between Cr(VI) and MB species were analyzed. The obtained results showed that CNTs could effectively reduce the recombination rate of electron-hole pairs during the photocatalytic reaction of the g-C3N4/BiFeO3 composite, thereby improving its photocatalytic performance, while the presence of MB increased the reduction rate of Cr(VI). After 5 h of the simultaneous adsorption and photocatalysis by CNBT, the removal rates of Cr(VI) and MB were 93% and 98%, respectively. This study provides a new theoretical basis and technical guidance for the combined application of photocatalysis and adsorption in the treatment of wastewaters containing mixed pollutants.

show abstract

Highly efficient photocatalytic reduction of Cr(VI) by bismuth hollow nanospheres

Cited by 82 publications

References 27 publications

Dual-modality, fluorescent, PLGA encapsulated bismuth nanoparticles for molecular and cellular fluorescence imaging and computed tomography

Dual-modality, fluorescent, PLGA encapsulated bismuth nanoparticles for molecular and cellular fluorescence imaging and computed tomography

BiOX (X=Cl, Br, I) nanostructures: Mannitol-mediated microwave synthesis, visible light photocatalytic performance, and Cr(VI) removal capacity

Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C3N4/BiFeO3/Carbon Nanotubes Ternary Composites

Contact Info

Product

Resources

About