Superoxide radicals dominated visible light driven peroxymonosulfate activation using molybdenum selenide (MoSe2) for boosting catalytic degradation of pharmaceuticals and personal care products

Dong, Chencheng; Wang, Zhiqiang; Ye, Zhichao; He, Jijun; Zheng, Zexiao; Gong, X. G.; Zhang, Jinlong; Lo, Irene Man Chi

doi:10.1016/j.apcatb.2021.120223

Cited by 97 publications

(34 citation statements)

References 54 publications

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“…On the contrary, the typical signal of DMPO–O 2 ˙ − could be observed, revealing the generation of O 2 ˙ − (ref. 34) (Fig. 3b).…”

Section: Resultsmentioning

confidence: 95%

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Selective Photocatalyst for styrene epoxidation with atmospheric O₂using covalent organic frameworks

Liang

et al. 2022

Catal. Sci. Technol.

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“…On the contrary, the typical signal of DMPO–O 2 ˙ − could be observed, revealing the generation of O 2 ˙ − (ref. 34) (Fig. 3b).…”

Section: Resultsmentioning

confidence: 95%

“…When 5,5-dimethyl-1-pyrroline (DMPO) as a spin-trapping reagent was used to check whether hydroxyl radicals (˙OH) were present. There was no characteristic EPR signal of the DMPO−˙OH adduct, 34 excluding the participation of ˙OH in the photocatalytic process (Fig. S1†).…”

Section: Resultsmentioning

confidence: 99%

Selective Photocatalyst for styrene epoxidation with atmospheric O₂using covalent organic frameworks

Liang

et al. 2022

Catal. Sci. Technol.

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“…36 The XPS spectra of three POMs and POM-doped hole transport material (HTM) films were further recorded (Figures 2b,c, S6, and S7). Generally, the peaks around 236.1 and 232.8 eV were assigned to the Mo 6+ oxidation state, 37 and the peaks around 524.9 and 517.6 eV were assigned to the V 5+ oxidation state 38 in the XPS spectra of a series of pure POMs. As the number of V substitutions increased, the binding energies of Mo 3d slightly shifted to the lower region, while the binding energies of V 2p shifted to the higher region due to the internal d-electron transfer in the Vsubstituted POMs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Investigation on the Mechanism of Radical Intermediate Formation and Moderate Oxidation of Spiro-OMeTAD by the Synergistic Effect of Multisubstituted Polyoxometalates in Perovskite Solar Cells

Zhang

Fan

et al. 2022

ACS Appl. Mater. Interfaces

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Conventional oxidation of 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (Spiro-OMeTAD) by air would bring various drawbacks for perovskite solar cells (PSCs), such as low power conversion efficiency (PCE) and poor stability. Here, a series of heteroatom-substituted Keggin-type polyoxometalates (POMs), H4PMo11VO40 (PMo11V), H5PMo10V2O40 (PMo10V2), and H6PMo9V3O40 (PMo9V3) are prepared and applied as p-type dopants to realize quantitative and controllable oxidation of Spiro-OMeTAD under an inert condition. The possible mechanism and electron donor regions in the oxidation of Spiro-OMeTAD are investigated using two-dimensional nuclear magnetic resonance (NMR) spectra and the relationship between POM structures and the oxidation degree of Spiro-OMeTAD is proposed. In addition, the synergistic effect of heteroatoms makes V2-substituted PMo10V2 exhibit appropriate oxidation of Spiro-OMeTAD and promoted the highest efficient hole extraction as well as the decreased charge recombination. Therefore, the champion device doped with PMo10V2 shows a PCE of 20.41% and a superior open circuit voltage (V oc) of 1.133 V, surpassing that of the pristine device (18.61%). This work presents a fresh perspective to the controllable oxidation of Spiro-OMeTAD employing economical inorganic POM dopants, which would promote the commercialization of PSCs.

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“…An EPR spectrum with the spin-trapping reagent of DMPO was conducted in methanol to detect the generation of O 2 •– . The EPR spectrum of DMPO • –O 2 – observed in Figure a confirms the occurrence of O 2 •– in the reaction. ,− A triplet EPR signal with equal intensities was observed in the solution containing H 2 O 2 , Nb 2 O 5 /SiO 2 and TEMP, indicating that the reaction of H 2 O 2 and Nb 2 O 5 /SiO 2 could produce 1 O 2 to oxidize DMSO to DMSO 2 . , …”

Section: Resultsmentioning

confidence: 99%

Boosting H₂O₂ Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts

Wang

Guo

et al. 2022

Ind. Eng. Chem. Res.

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Dimethyl sulfoxide (DMSO) is a widely used solvent in many industries. The biodegradation of DMSO is difficult, resulting in large amounts volatile and noxious compounds emitted into the atmosphere, including dimethylsulfide, methyl mercaptan, and H2S. Therefore, it is necessary to deal with DMSO-containing wastewater using chemical methods. Here, supported niobia catalysts were prepared and characterized, and their catalytic performances was evaluated by the oxidative degradation of DMSO via H2O2 activation. The product of DMSO oxidation is dimethylsulfone which is a biodegradable and environmentally benign compound. The most active catalyst, 20%Nb2O5/SiO2, can remove 178.6 mmol/L DMSO within 2 h at 25 °C following a pseudo-first-order reaction. EPR spectroscopic studies and scavenging experiments confirms that O2 •– and 1O2 are the active species for DMSO degradation. Although the catalytic activity of Nb2O5/SiO2 drops significantly after use, its reusability improved conspicuously after calcination, and the catalyst can be reused for 5 times with an 82.2% DMSO conversion.

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Superoxide radicals dominated visible light driven peroxymonosulfate activation using molybdenum selenide (MoSe2) for boosting catalytic degradation of pharmaceuticals and personal care products

Cited by 97 publications

References 54 publications

Selective Photocatalyst for styrene epoxidation with atmospheric O₂using covalent organic frameworks

Selective Photocatalyst for styrene epoxidation with atmospheric O₂using covalent organic frameworks

Investigation on the Mechanism of Radical Intermediate Formation and Moderate Oxidation of Spiro-OMeTAD by the Synergistic Effect of Multisubstituted Polyoxometalates in Perovskite Solar Cells

Boosting H₂O₂ Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts

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Superoxide radicals dominated visible light driven peroxymonosulfate activation using molybdenum selenide (MoSe2) for boosting catalytic degradation of pharmaceuticals and personal care products

Cited by 97 publications

References 54 publications

Selective Photocatalyst for styrene epoxidation with atmospheric O2using covalent organic frameworks

Selective Photocatalyst for styrene epoxidation with atmospheric O2using covalent organic frameworks

Investigation on the Mechanism of Radical Intermediate Formation and Moderate Oxidation of Spiro-OMeTAD by the Synergistic Effect of Multisubstituted Polyoxometalates in Perovskite Solar Cells

Boosting H2O2 Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts

Contact Info

Product

Resources

About

Selective Photocatalyst for styrene epoxidation with atmospheric O₂using covalent organic frameworks

Selective Photocatalyst for styrene epoxidation with atmospheric O₂using covalent organic frameworks

Boosting H₂O₂ Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts