Efficient photocatalytic degradation of toxic dyes from aqueous environment using gelatin-Zr(IV) phosphate nanocomposite and its antimicrobial activity

Thakur, Manita; Sharma, Gaurav; Ahamad, Tansir; Ghfar, Ayman A.; Pathania, Deepak; Naushad, Mu.

doi:10.1016/j.colsurfb.2017.06.018

Cited by 115 publications

(21 citation statements)

References 58 publications

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“…Furthermore, rapid recombination of photo-induced pairs of electron-hole in the photocatalytic reaction would cause a reduction in its efficiency. The previous studies showed that coupling this semiconductor with a narrow bandgap semiconductor has resulted in an improvement in its light absorption range and yielded better catalytic results [33][34][35][36][37][38][39][40] . For instance, Tan et al reported that incorporation of ZnO into MoS 2 could result in easy transfer of electrons to the ZnO surface.…”

mentioning

confidence: 99%

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Ghasemipour

Fattahi

Rasekh

et al. 2020

Sci Rep

157

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Transition metal sulfide semiconductors have achieved significant attention in the field of photocatalysis and degradation of pollutants. MoS 2 with a two dimensional (2D) layered structure, a narrow bandgap and the ability of getting excited while being exposed to visible light, has demonstrated great potential in visible-light-driven photocatalysts. However, it possesses fast-paced recombination of charges. in this study, the coupled MoS 2 nanosheets were synthesized with Zno nanorods to develop the heterojunctions photocatalyst in order to obtain superior photoactivity. the charge transfer in this composite is not adequate to achieve desirable activity. therefore, heterojunction was modified by reduced graphene oxide (RGO) nanosheets and carbon nanotubes (cnts) to develop the RGo/Zno/MoS 2 and cnts/Zno/MoS 2 ternary nanocomposites. the structure, morphology, composition, optical and photocatalytic properties of the as-fabricated samples were characterized through X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), Field Emission Scanning electron Microscopy (feSeM), transmission electron Microscopy (teM), energy-Dispersive X-ray (eDX), elemental mapping, photoluminescence (pL), Ultraviolet-Visible spectroscopy (UV-ViS), and Brunauer-emmett-teller (Bet) techniques. the photo-catalytic performance of all samples was evaluated through photodegradation of aniline in aqueous solution. the combination of RGo or cnts into the Zno/MoS 2 greatly promoted the catalytic activity. However, the resulting RGo/Zno/MoS 2 ternary nanocomposites showed appreciably increased catalytic performance, faster than that of cnts/Zno/MoS 2. charge carrier transfer studies, the Bet surface area analysis, and the optical studies confirmed this superiority. The role of operational variables namely, solution pH, catalyst dosage amount, and initial concentration of aniline was then investigated for obtaining maximum degradation. complete degradation was observed, in the case of pH = 4, catalyst dosage of 0.7 g/L and aniline concentration of 80 ppm, and light intensity of 100 W. According to the results of trapping experiments, hydroxyl radical was found to be the main active species in the photocatalytic reaction. Meanwhile, a plausible mechanism was proposed for describing the degradation of aniline upon ternary composite. Moreover, the catalyst showed excellent reusability and stability after five consecutive cycles due to the synergistic effect between its components. Total-Organic-Carbon concentration (TOC) results suggested that complete mineralization of aniline occurred after 210 min of irradiation. Finally, a real petrochemical wastewater sample was evaluated for testing the catalytic ability of the as-fabricated composites in real case studies and it was observed that the process successfully quenched 100% and 93% of Chemical Oxygen Demand (COD) and TOC in the wastewater, respectively.

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confidence: 99%

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Ghasemipour

Fattahi

Rasekh

et al. 2020

Sci Rep

157

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“…Though many technologies have been employed to remove E. coli from solution, currently applied water treatment methods are still not able to provide the water quality and demand with a low cost to meet improved requirements of the environment and human health (Schwarzenbach et al, 2006;Sedlak and von Gunten, 2011). Therefore, different materials were developed as cleaner productions to fulfill next-generation demand of effective, costeffective, or sustainable disinfection in water treatment (Boholm and Arvidsson, 2014;Gupta et al, 2015;Raza et al, 2015;Thakur et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effective water disinfection using magnetic barium phosphate nanoflakes loaded with Ag nanoparticles

Fan

Lee

Huang

et al. 2019

Journal of Cleaner Production

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In this work, novel magnetic nanocomposites, Fe 3 O 4 @Ba 3 (PO 4) 2 (denominated FBP) nanoflakes loaded with Ag nanoparticles (NPs) (denominated FBPA), were reported for cleaning E. coli from water. FBPA with 1 wt% Ag (denominated FBPA1) showed a higher adsorption efficiency (94%) than FBPA with 10 wt% Ag (denominated FBPA10), for water heavily contaminated with E. coli (5 Â 10 8 CFU/mL), both at a dosage of 1 g/L within 10 min. Importantly, the loaded Ag NPs can greatly improve the disinfection effect of FBP due to the great antimicrobial activity of Ag NPs via the released Ag þ. Confocal fluorescent images and dilution plating results showed that~100% of E. coli could be inactivated by FBPA1 within 10 min. The calculated disinfection capacity was higher than some other materials. Three co-existed salts in solutions decreased the disinfection efficiency of FBPA1 to be~67% (NaCl),~59% (CaCl 2), and~41% (MgCl 2). Furthermore, FBPA1 can be reclaimed via a magnet to be reused. FBPA1 maintained an adsorption efficiency of 86%, disinfection effect of 70%, and~90% of loaded Ag NPs after the fifth recover and reuse cycle.

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“…Nanomaterials and nanocomposites have distinctive and interesting properties for application in different industrial fields . Synthesis of Cu nanoparticles (NPs) has attracted considerable attention owing to the availability and low price of copper .…”

Section: Introductionmentioning

confidence: 99%

“…Nanomaterials and nanocomposites have distinctive and interesting properties for application in different industrial fields. [13][14][15][16][17][18][19] Synthesis of Cu nanoparticles (NPs) has attracted considerable attention owing to the availability and low price of copper. [18,19] However, in most cases, Cu NPs are unstable under reaction conditions, and have a tendency for aggregation causing the loss of their unique properties.…”

Section: Introductionmentioning

confidence: 99%

One‐pot green synthesis of Cu/bone nanocomposite and its catalytic activity in the synthesis of 1‐substituted 1H‐1,2,3,4‐tetrazoles and reduction of hazardous pollutants

Maham

Nasrollahzadeh

2019

Applied Organom Chemis

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In this work, a simple and green method is reported for the biosynthesis of Cu/bone nanocomposite using Cordyline fruticosa extract as a stabilizer and reductant. Animal bone was used as a natural support to prevent the accumulation of Cu nanoparticles. The catalytic activity of Cu/bone nanocomposite was assessed in the synthesis of 1‐substituted 1H‐1,2,3,4‐tetrazoles and reduction of various organic dyes, including 4‐nitrophenol (4‐NP), nigrosin (NS), congo red (CR) and methylene blue (MB). The best catalytic performance in the synthesis of 1‐substituted tetrazoles was achieved using 0.05 g of Cu/bone nanocomposite at 120°C. In addition, under optimal conditions, the absorption bands corresponding to 4‐NP, CR, NS and MB completely disappeared after about 6 min, 3 min, 50 s and 7 s, respectively. The biosynthesis protocol used in the preparation of Cu/bone nanocomposite offers a very attractive area for further research.

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Efficient photocatalytic degradation of toxic dyes from aqueous environment using gelatin-Zr(IV) phosphate nanocomposite and its antimicrobial activity

Cited by 115 publications

References 58 publications

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Effective water disinfection using magnetic barium phosphate nanoflakes loaded with Ag nanoparticles

One‐pot green synthesis of Cu/bone nanocomposite and its catalytic activity in the synthesis of 1‐substituted 1H‐1,2,3,4‐tetrazoles and reduction of hazardous pollutants

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