Impact of dysprosium doped (Dy) zinc ferrite (ZnFe2o4) nanocrystals in photo- fenton exclusion of recalcitrant organic pollutant

Background: Coal gangue was used as a catalyst in heterogeneous Fenton process for the degradation of azo dye and phenol. The influencing factors, such as solution pH gangue concentration and hydrogen peroxide dosage were investigated, and the reaction mechanism between coal gangue and hydrogen peroxide was also discussed. Methods: Experimental results showed that coal gangue has the ability to activate hydrogen peroxide to degrade environmental pollutants in aqueous solution. Under optimal conditions, after 60 minutes of treatment, more than 90.57% of reactive red dye was removed, and the removal efficiency of Chemical Oxygen Demand (COD) up to 72.83%. Results: Both hydroxyl radical and superoxide radical anion participated in the degradation of organic pollutant but hydroxyl radical predominated. Stability tests for coal gangue were also carried out via the continuous degradation experiment and ion leakage analysis. After five times continuous degradation, dye removal rate decreased slightly and the leached Fe was still at very low level (2.24-3.02 mg L-1). The results of Scanning Electron Microscope (SEM), energy dispersive X-Ray Spectrometer (EDS) and X-Ray Powder Diffraction (XRD) indicated that coal gangue catalyst is stable after five times continuous reuse. Conclusion: The progress in this research suggested that coal gangue is a potential nature catalyst for the efficient degradation of organic pollutant in water and wastewater via the Fenton reaction.

Download Full-text

A New Route for the Synthesis of Visible-Light Driven Ag,V Co-Doped TiO2 for Degradation of Organic Pollutant

Russian Journal of Physical Chemistry A ◽

10.1134/s0036024420130166 ◽

2020 ◽

Vol 94 (13) ◽

pp. 2715-2722

Author(s):

M. K. Ntobeng ◽

R. Akbarzadeh

Keyword(s):

Visible Light ◽

Organic Pollutant ◽

Doped Tio2 ◽

Visible Light Driven ◽

Co Doped

Download Full-text

Challenges of organic pollutant photocatalysis by biochar-based catalysts

Biochar ◽

10.1007/s42773-021-00098-y ◽

2021 ◽

Author(s):

Muqing Qiu ◽

Baowei Hu ◽

Zhongshan Chen ◽

Hui Yang ◽

Li Zhuang ◽

...

Keyword(s):

Organic Pollutant

Download Full-text

A Sensitive Visible Light Photodetector Using Cobalt-Doped Zinc Ferrite Oxide Thin Films

ACS Applied Materials & Interfaces ◽

10.1021/acsami.0c20487 ◽

2021 ◽

Vol 13 (5) ◽

pp. 6411-6420

Author(s):

Pin-Hung Chung ◽

Chia-Tung Kuo ◽

Tzu-Hsuan Wang ◽

You-Yan Lu ◽

Chao-I Liu ◽

...

Keyword(s):

Thin Films ◽

Visible Light ◽

Zinc Ferrite ◽

Oxide Thin Films

Download Full-text

Electrospun-based TiO2 nanofibers for organic pollutant photodegradation: a comprehensive review

Reviews in Chemical Engineering ◽

10.1515/revce-2020-0022 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Khee Chung Hui ◽

Hazwani Suhaimi ◽

Nonni Soraya Sambudi

Keyword(s):

Visible Light ◽

Organic Pollutants ◽

Organic Pollutant ◽

Hollow Fibers ◽

Promising Alternative ◽

Tio2 Nanofibers ◽

As Doping ◽

Secondary Pollutants ◽

Photocatalytic Reactors ◽

Light Area

Abstract Titanium dioxide (TiO2) is commonly used as a photocatalyst in the removal of organic pollutants. However, weaknesses of TiO2 such as fast charge recombination and low visible light usage limit its industrial application. Furthermore, photocatalysts that are lost during the treatment of pollutants create the problem of secondary pollutants. Electrospun-based TiO2 fiber is a promising alternative to immobilize TiO2 and to improve its performance in photodegradation. Some strategies have been employed in fabricating the photocatalytic fibers by producing hollow fibers, porous fibers, composite TiO2 with magnetic materials, graphene oxide, as well as doping TiO2 with metal. The modification of TiO2 can improve the absorption of TiO2 to the visible light area, act as an electron acceptor, provide large surface area, and promote the phase transformation of TiO2. The improvement of TiO2 properties can enhance carrier transfer rate which reduces the recombination and promotes the generation of radicals that potentially degrade organic pollutants. The recyclability of fibers, calcination effect, photocatalytic reactors used, operation parameters involved in photodegradation as well as the commercialization potential of TiO2 fibers are also discussed in this review.

Download Full-text

Modeling and simulation of micro-rotation and spin gradient viscosity for ferromagnetic hybrid (Manganese Zinc Ferrite, Nickle Zinc Ferrite) nanofluids

Mathematics and Computers in Simulation ◽

10.1016/j.matcom.2021.01.007 ◽

2021 ◽

Vol 185 ◽

pp. 497-509

Author(s):

M. Ijaz Khan ◽

Sumaira Qayyum ◽

Shahid Farooq ◽

Yu-Ming Chu ◽

Seifedine Kadry

Keyword(s):

Modeling And Simulation ◽

Zinc Ferrite ◽

Manganese Zinc ◽

Manganese Zinc Ferrite

Download Full-text

Tracking of Zinc Ferrite Nanoparticle Effects on Pea (Pisum sativum L.) Plant Growth, Pigments, Mineral Content and Arbuscular Mycorrhizal Colonization

Plants ◽

10.3390/plants10030583 ◽

2021 ◽

Vol 10 (3) ◽

pp. 583

Author(s):

Reda E. Abdelhameed ◽

Nagwa I. Abu-Elsaad ◽

Arafat Abdel Hamed Abdel Latef ◽

Rabab A. Metwally

Keyword(s):

Pisum Sativum ◽

Plant Growth ◽

Zinc Ferrite ◽

Crop Improvement ◽

Nanocrystalline Structure ◽

Arbuscular Mycorrhizal ◽

Am Fungi ◽

Transmission Electron ◽

Agricultural Applications ◽

The Impact

Important gaps in knowledge remain regarding the potential of nanoparticles (NPs) for plants, particularly the existence of helpful microorganisms, for instance, arbuscular mycorrhizal (AM) fungi present in the soil. Hence, more profound studies are required to distinguish the impact of NPs on plant growth inoculated with AM fungi and their role in NP uptake to develop smart nanotechnology implementations in crop improvement. Zinc ferrite (ZnFe2O4) NPs are prepared via the citrate technique and defined by X-ray diffraction (XRD) as well as transmission electron microscopy for several physical properties. The analysis of the XRD pattern confirmed the creation of a nanocrystalline structure with a crystallite size equal to 25.4 nm. The effects of ZnFe2O4 NP on AM fungi, growth and pigment content as well as nutrient uptake of pea (Pisum sativum) plants were assessed. ZnFe2O4 NP application caused a slight decrease in root colonization. However, its application showed an augmentation of 74.36% and 91.89% in AM pea plant shoots and roots’ fresh weights, respectively, compared to the control. Moreover, the synthesized ZnFe2O4 NP uptake by plant roots and their contents were enhanced by AM fungi. These findings suggest the safe use of ZnFe2O4 NPs in nano-agricultural applications for plant development with AM fungi.

Download Full-text