Visible light promoted Fe3S4 Fenton oxidation of atrazine

Shi, Yanbiao; Wang, Xiaobing; Liu, Xiufan; Ling, Cancan; Shen, Wenjuan; Zhang, Lizhi

doi:10.1016/j.apcatb.2020.119229

Cited by 107 publications

(48 citation statements)

References 52 publications

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“…This result firmly demonstrated that the possible recombination of photogenerated electron-hole pairs was inhibited. [28] Moreover, the nearly complete quenching of fluorescence shown in Figure 6B all directly reveals the samples experienced excellent charge separation, which is consistent with the photocurrent analysis. We believe the assembled TiO 2 nanowires definitely improved light scattering absorption somehow.…”

Section: Photocatalytic Activity and Stability Of Cu 2 O/tiosupporting

confidence: 82%

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Simultaneous Tuning Band Gaps of Cu₂O and TiO₂ to Form S‐Scheme Hetero‐Photocatalyst

Wang

Xue

et al. 2021

Chemistry A European J

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Photocatalytic Z or S scheme merits higher redox potentials and faster charge separation. However, heterostructure photocatalysts with band gaps of bulk materials often have a type I band structure leading to poor photocatalytic activity. In view of this, we report simultaneous tuning of band gaps of Cu 2 O and TiO 2 , where quantum dot Cu 2 O nanoparticles were formed on doped TiO 2 with Ti 3 + . The reduced size of Cu 2 O made its conduction band more negative, whereas the introduction of Ti 3 + made the absorption edge red shift to the visible light region. The as-formed heterostructure enabled an S-Scheme mechanism with remarkable activity and stability for visible light photodegradation of 4-chlorophenol (4-CP). The as-obtained photocatalysts' activity demonstrated ca. 510-fold increase as compared to individual ones and a mechanical blend. The asobtained photocatalysts maintained over 80 % for 5 cycles and 2 months exposure to O 2 did not decrease the degradation rate. ESR characterization and scavenger experiments proved the S-Scheme mechanism.

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Section: Photocatalytic Activity and Stability Of Cu 2 O/tiosupporting

confidence: 82%

“…30 times as compared to pristine TiO 2 ,suggesting that photogenerated electron-hole pairs were effectively separated. This result firmly demonstrated that the possible recombination of photogenerated electron-hole pairs was inhibited [28]. Moreover, the nearly complete quenching of fluorescence shown in Figure6Ball directly…”

supporting

confidence: 69%

Simultaneous Tuning Band Gaps of Cu₂O and TiO₂ to Form S‐Scheme Hetero‐Photocatalyst

Wang

Xue

et al. 2021

Chemistry A European J

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“…29 Experiments showed that under visible light irradiation, greigite (Fe 3 S 4 ) could excite photogenerated charge carriers and transfer them to the surface, reducing surface Fe( iii ) to active Fe( ii ). 30 Greigite and pyrite have similar chemical compositions and smaller band gaps, which make them respond to the wider solar spectrum from the ultraviolet to infrared region, and were expected to have good photocatalytic performance. However, it is difficult to synthesize pure-phase crystals of FeS 2 and Fe 3 S 4 in the same system due to the unique transformation mechanism in the synthesis of iron sulfide, which is to generate FeS first and then convert to different iron sulfides such as Fe 7 S 8 , Fe 3 S 4 , FeS 2 , etc.…”

Section: Introductionmentioning

confidence: 99%

Stoichiometry-controlled synthesis of pyrite and greigite particles for photo-Fenton degradation catalysis

Shi

Zhang

et al. 2022

New J. Chem.

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“…In homogeneous Fenton processes, drawbacks of the secondary contamination caused by the iron-containing sludge were encountered due to the less implement of separation. 4 Presently, great efforts have been devoted to seeking efficient heterogeneous Fenton or Fenton-like catalysts, for example, iron sulfides, 5 iron oxides, 6 manganese oxides, 7 and such similar composites. [8][9][10][11] However, the synthesis of these catalysts always required complicated procedures with chemical/energy consumption, whereas natural iron-bearing clays, [12][13][14][15] for example, sediments of minerals as montmorillonite, nontronite from oceans, rivers, and groundwater are of great abundance, and ought to have great potential in Fenton reactions or AOPs.…”

Section: Introductionmentioning

confidence: 99%

Deep‐sea clays using as active Fenton catalysts for self‐propelled motors

et al. 2022

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Raw deep-sea clays (i.e., pelagic clays) collected from the Indian Ocean were able to function as Fenton catalysts and self-propelled micromotors due to the high content of Fe-and Mn-. The pelagic clays were for the first time observed to be automatic in the H 2 O 2 solution. The pelagic clays existed in the form of poorly crystallized marine sedimentation. The major minerals were found as illite/montmorillonite (I/M) and amorphous ferromanganese nodules, and the minor minerals included kaolinite, quartz, feldspar, and calcite. Significant amounts of oxygen bubbles were generated when the clay particles were dispersed into the H 2 O 2 solution (0.1-10.0 wt.%), and the average velocity of the motors was observed as high as 183.0 μm s -1 in 10.0 wt.% H 2 O 2 . The selfpropulsion would induce vigorous mixing in local areas of the solution and was confirmed to benefit the catalytic performance. The clays were employed to remove Rhodamine B (RhB) for a proof-of-concept study. In the acid solution (pH = 1.0-5.0), the removal of RhB was controlled by the Fenton process accompanied by the adsorption of clay particles. In the alkaline solution (pH = 9.0), the removal of RhB was found to follow an adsorptive bubble separation pathway. Both processes were greatly influenced by the self-motion of MnO x motors contained in the pelagic clays.

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Visible light promoted Fe3S4 Fenton oxidation of atrazine

Cited by 107 publications

References 52 publications

Simultaneous Tuning Band Gaps of Cu₂O and TiO₂ to Form S‐Scheme Hetero‐Photocatalyst

Simultaneous Tuning Band Gaps of Cu₂O and TiO₂ to Form S‐Scheme Hetero‐Photocatalyst

Stoichiometry-controlled synthesis of pyrite and greigite particles for photo-Fenton degradation catalysis

Deep‐sea clays using as active Fenton catalysts for self‐propelled motors

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Visible light promoted Fe3S4 Fenton oxidation of atrazine

Cited by 107 publications

References 52 publications

Simultaneous Tuning Band Gaps of Cu2O and TiO2 to Form S‐Scheme Hetero‐Photocatalyst

Simultaneous Tuning Band Gaps of Cu2O and TiO2 to Form S‐Scheme Hetero‐Photocatalyst

Stoichiometry-controlled synthesis of pyrite and greigite particles for photo-Fenton degradation catalysis

Deep‐sea clays using as active Fenton catalysts for self‐propelled motors

Contact Info

Product

Resources

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Simultaneous Tuning Band Gaps of Cu₂O and TiO₂ to Form S‐Scheme Hetero‐Photocatalyst

Simultaneous Tuning Band Gaps of Cu₂O and TiO₂ to Form S‐Scheme Hetero‐Photocatalyst