Superior azo-dye degradation of Fe-Si-B-P amorphous powders with graphene oxide addition

Wang, Feng; Wang, Hao; Zhang, Haifeng; Dan, Zhenhua; Weng, Nan; Tang, Wanying; Qin, Fengxiang

doi:10.1016/j.jnoncrysol.2018.03.048

Cited by 14 publications

(3 citation statements)

References 29 publications

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“…Figure 5 a shows the UV-visible absorption spectrum of the simulated dye wastewater solution, which is degraded with M82 powder at different times. The absorption spectrum of the DB6 solution usually has significant absorption between 500 and 700 nm, with a peak of about 570 nm [ 45 , 46 ]. After degradation for 0.5 min, the absorption peak height is significantly reduced by 84%, which shows the high efficiency of the M82 sample in the degradation of azo dyes.…”

Section: Resultsmentioning

confidence: 99%

Fast Degradation of Azo Dyes by In Situ Mg-Zn-Ca-Sr Metallic Glass Matrix Composite

Jin

Wang

et al. 2023

Materials

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Mg-based metallic glass (MG) has attracted extensive attention in the field of wastewater treatment due to its high decolorization rate in degrading azo dyes. However, the azo dye degradation rate of Mg-based MGs is strongly dependent on the particle size. Improving the intrinsic degradation efficiency using large particles is of great interest for future applications. In this work, in-situ metallic glass matrix composites (MGMCs) with high Mg content were successfully prepared by melt spinning. It is found that when the Mg content is 79–82%, the as-spun sample shows typical glassy characteristics. The SEM and XRD tests confirm that the as-spun sample is composed of α-Mg dendrite, multiple Mg-Zn intermetallic particles and an MG matrix. The degradation experiment using Direct Blue 6 and a 500 μm particle sample demonstrate that the Mg82Zn14Ca3Sr1 MGMC sample degrades azo dyes faster than typical Mg-Zn-Ca MG alloy. It can be attributed to the galvanic cell effect on the α-Mg/MG interface, which reduces the waste of active Mg atoms in the MG matrix according to the corrosion protection mechanism by the α-Mg anode sacrifice. This result provides a new perspective and insight into the design of azo dye degradation alloys and the understanding of degradation mechanisms.

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Section: Resultsmentioning

confidence: 99%

Fast Degradation of Azo Dyes by In Situ Mg-Zn-Ca-Sr Metallic Glass Matrix Composite

Jin

Wang

et al. 2023

Materials

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“…Zhang et al achieved rapid degradation of MO solution by Fenton-like reaction using Fe-based amorphous ribbons. This study found that the rate of hydroxyl radical production in Fe 78 Si 9 B 13 amorphous ribbons was 5–10 times faster than other Fe-based catalysts [ 22 , 44 , 45 , 46 , 47 , 48 ]. Among all the amorphous alloy systems used for organic dye degradation, the Al-based amorphous alloys have the characteristics of low-cost materials, good reusability, high degradation efficiency, degradation under various environmental conditions, etc.…”

Section: Introductionmentioning

confidence: 86%

Role of Nanocrystallites of Al-Based Glasses and H2O2 in Degradation Azo Dyes

et al. 2020

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Al-based metallic glasses have a special atomic structure and should have a unique degradation ability in azo dye solutions. The Al88Ni9Y3 (Y3), Al85Ni9Y6 (Y6) and Al82Ni9Y9 (Y9) glassy ribbons are melt spun and used in degrading methyl orange (MO) azo dye solution with adding H2O2. With increasing cY, the as-spun ribbons have an increasing GFA (glass formability) and gradually decreased the degradation rate of MO solution. TEM (transmission electron microscopy) results show that the Y3 ribbon has nano-scale crystallites, which may form the channels to transport elements to the surface for degrading the MO solution. After adding H2O2, the degradation efficiency of Al-based glasses is improved and the Y6 ribbon has formed nano-scale crystallites embedded in the amorphous matrix and it has the largest improvement in MO solution degradation. These results indicate that forming nano-scale crystallites and adding H2O2 are effective methods to improve the degradation ability of Al-based glasses in azo dye solutions.

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“…Both the degradation of MO and MB solutions by Cu 2 O@NP Cu catalysts follows the pseudo-first-order kinetic mode (C = C 0 exp(-k obs t), R 2 [ 0.95). The reaction rate constants k obs calculated from fitting results are 0.0624 min -1 and 0.0544 min -1 for MO and MB solutions, as given in Table 2, which are higher than graphene oxide-or Febased amorphous powders, due to the difference in degradation mechanism [19,33].…”

Section: Fabrication and Photocatalytic Activity Of Cu 2 O@np Cu Photmentioning

confidence: 99%

Fabrication and Photocatalytic Activity of Cu2O Nanobelts on Nanoporous Cu Substrate

Chi

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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In this paper, we report the fabrication of the photocatalysts composed of Cu 2 O nanobelts and nanoporous Cu (NP Cu) substrate, which is obtained by soaking the NP Cu in dehydrated ethanol. The NP Cu substrate is achieved by dealloying of Ti 40.6 Zr 9.4 Cu 40.6 Ni 6.3 Sn 3.1 amorphous ribbons in HF solutions. The dealloying process is considered to be a thermally activated process, obeying the Arrhenius law. The surface diffusivity increases with increasing dealloying temperature and concentration of HF solutions. The activation energy of the diffusion of Cu adatoms is estimated to be 76.4 kJ/mol. The Cu 2 O nanobelts with the width of 10-15 nm and the length of about 1 lm are formed on the surface of NP Cu after immersion in dehydrated ethanol. The photocatalysts of Cu 2 O on nanoporous Cu exhibit superior photocatalytic activity toward the degradation of methyl orange and methylene blue under the irradiation of the sunlight due to the coexistence of Cu 2 O semiconductor nanobelts and large amount of heterojunctions as flowing path for photoelectrons.

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Superior azo-dye degradation of Fe-Si-B-P amorphous powders with graphene oxide addition

Cited by 14 publications

References 29 publications

Fast Degradation of Azo Dyes by In Situ Mg-Zn-Ca-Sr Metallic Glass Matrix Composite

Fast Degradation of Azo Dyes by In Situ Mg-Zn-Ca-Sr Metallic Glass Matrix Composite

Role of Nanocrystallites of Al-Based Glasses and H2O2 in Degradation Azo Dyes

Fabrication and Photocatalytic Activity of Cu2O Nanobelts on Nanoporous Cu Substrate

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