Chemically stable and reusable nano zero-valent iron/graphite-like carbon nitride nanohybrid for efficient photocatalytic treatment of Cr(VI) and rhodamine B under visible light

Liang, Zhiyu; Wen, Qingjuan; Xiu, Wang; Zhang, Fuwei; Yu, Yan

doi:10.1016/j.apsusc.2016.06.010

Cited by 52 publications

(8 citation statements)

References 38 publications

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“…In particular, the effective transfer of photogenerated holes from the valence band of CdS would be an ideal strategy to deal with the photocorrosion problem and improve the stability of CdS. Fortunately, graphitic carbon nitride (g-C 3 N 4 ) has a suitable energy level for constructing a heterostructure with CdS to afford an effective separation and transfer of photogenerated charges [ 23 , 24 , 25 , 26 , 27 , 28 ]. Thanks to its rigid heptazine ring structure, π-conjugated electronic structure, and high condensation degree, g-C 3 N 4 possesses many advantages in building the heterostructure, including excellent physicochemical stability and attractive electronic structure combined with an appropriate band gap (~2.7 eV).…”

Section: Introductionmentioning

confidence: 99%

CdS Nanocubes Adorned by Graphitic C3N4 Nanoparticles for Hydrogenating Nitroaromatics: A Route of Visible-Light-Induced Heterogeneous Hollow Structural Photocatalysis

et al. 2022

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Modulating the transport route of photogenerated carriers on hollow cadmium sulfide without changing its intrinsic structure remains fascinating and challenging. In this work, a series of well-defined heterogeneous hollow structural materials consisting of CdS hollow nanocubes (CdS NCs) and graphitic C3N4 nanoparticles (CN NPs) were strategically designed and fabricated according to an electrostatic interaction approach. It was found that such CN NPs/CdS NCs still retained the hollow structure after CN NP adorning and demonstrated versatile and remarkably boosted photoreduction performance. Specifically, under visible light irradiation (λ ≥ 420 nm), the hydrogenation ratio over 2CN NPs/CdS NCs (the mass ratio of CN NPs to CdS NCs is controlled to be 2%) toward nitrobenzene, p-nitroaniline, p-nitrotoluene, p-nitrophenol, and p-nitrochlorobenzene can be increased to 100%, 99.9%, 83.2%, 93.6%, and 98.2%, respectively. In addition, based on the results of photoelectrochemical performances, the 2CN NPs/CdS NCs reach a 0.46% applied bias photo-to-current efficiency, indicating that the combination with CN NPs can indeed improve the migration and motion behavior of photogenerated carriers, besides ameliorating the photocorrosion and prolonging the lifetime of CdS NCs.

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Section: Introductionmentioning

confidence: 99%

CdS Nanocubes Adorned by Graphitic C3N4 Nanoparticles for Hydrogenating Nitroaromatics: A Route of Visible-Light-Induced Heterogeneous Hollow Structural Photocatalysis

et al. 2022

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“…15 Liang et al used NZVI/graphitelike carbon nitride nanohybrid materials for photocatalytic removal of Cr(VI) from water under visible light. 16 These materials exhibited improved performance for removal of Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

Removal of Cr(VI) by a simply prepared biochar‐supported nanoscale zero‐valent iron

Cao

Chen

Wan

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Cr(VI) is highly migratory and toxic, and long‐term exposure to Cr(VI) is likely to cause cancer, teratogenesis and mutagenicity. Therefore, the removal of Cr(VI) in polluted wastewater is the key to ensure the safety of water quality. In this study, a composite material consisting of nanoscale zero‐valent iron (NZVI) particles supported on biochar derived from starch (NZVI/BC) was prepared via carbonizing the mixture of starch and ferric nitrate in inert gas and used for removal of Cr(VI) from solution. The effects of NZVI/BC dosage, initial pH and reaction temperature on the removal efficiency of Cr(VI) were investigated. RESULTS The results revealed that H2 and CH4 originating from the decomposition of starch acted as reducing agents for in situ generation of NZVI from Fe precursors. The removal efficiency of Cr(VI) was strongly dependent on dosage, pH and reaction temperature. Higher dosage, lower pH value and higher temperature led to an increase in Cr(VI) removal efficiency. Pseudo‐second‐order kinetics was suitable to describe the process of Cr(VI) removal by NZVI/BC. CONCLUSIONS NZVI/BC could be a potential and effective material for removal of Cr(VI) from solution. © 2022 Society of Chemical Industry (SCI).

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“…A large number of literature has reported that the adsorbed NZVI particles can be coalesced in soils and gradually lose their activities [20][21][22][23]. In addition, there are also a few studies reporting the release of NZVI particles from sludge [24][25][26][27][28]. A new synthesized NZVI is usually easy to be spontaneously oxidized when it is exposed to the air [29].…”

Section: Introductionmentioning

confidence: 99%

Adsorption, transformation, and colloid-facilitated transport of nano-zero-valent iron in soils

Zhang

et al. 2019

Environmental Pollutants and Bioavailability

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Because of its unique reductive properties, nanoscale zero-valent iron (NZVI) has been widely used in soil and groundwater remediation. It is crucial to understand the fate of NZVI in soils. In this work, a range of laboratory experiments was conducted to examine the adsorption, transformation, and transport of NZVI. The NZVI particles showed relatively strong sorption onto vertic shajiang-aquic cambosols, typic-hapli-udic argosols and typic ochri-aquic cambosols and isotherms can be well described by the Langmuir model. When cultivated in the soils, the NZVI was oxidized within seven days and the particle size also increased with average size reaching around 100 nm at 28 days. Columns were packed with quartz sand, sandy soil and diatomite as saturated porous media to evaluate the role of soil colloids in affecting the transport of NZVI. The results showed that NZVI transport in the columns was strongly affected by medium types, dispersion agent types, and soil colloids. Comparisons of breakthrough curves of different types of dispersed NZVI and corresponding colloid-NZVI revealed that natural soil colloids facilitated NZVI transport in porous media. Findings from this work can provide useful information to better evaluate the applications and impacts of NZVI as an environmental remediation agent.

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Chemically stable and reusable nano zero-valent iron/graphite-like carbon nitride nanohybrid for efficient photocatalytic treatment of Cr(VI) and rhodamine B under visible light

Cited by 52 publications

References 38 publications

CdS Nanocubes Adorned by Graphitic C3N4 Nanoparticles for Hydrogenating Nitroaromatics: A Route of Visible-Light-Induced Heterogeneous Hollow Structural Photocatalysis

CdS Nanocubes Adorned by Graphitic C3N4 Nanoparticles for Hydrogenating Nitroaromatics: A Route of Visible-Light-Induced Heterogeneous Hollow Structural Photocatalysis

Removal of Cr(VI) by a simply prepared biochar‐supported nanoscale zero‐valent iron

Adsorption, transformation, and colloid-facilitated transport of nano-zero-valent iron in soils

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