SnO2 nanoparticles embedded onto MoS2 nanoflakes - An efficient catalyst for photodegradation of methylene blue and photoreduction of hexavalent chromium

Szkoda, Mariusz; Zarach, Zuzanna; Nadolska, Małgorzata; Trykowski, Grzegorz; Trzciński, Konrad

doi:10.1016/j.electacta.2022.140173

Cited by 16 publications

(7 citation statements)

References 71 publications

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“…During the reaction, the VB edge potential of the sample is superior to the standard redox potentials of both •OH/OH − and •OH/H 2 O, suggesting that the holes build up on the VB to generate the oxidization of OH − (see Figure 10 ), resulting in the formation of •OH. Despite the slow oxidative hydrolysis kinetics, the oxidative radical species remain crucial to drive the photodegradation of organic pollutants [ 24 – 25 ].…”

Section: Resultsmentioning

confidence: 99%

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Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

Al Qaydi,

Rajput,

Lejeune

et al. 2024

Beilstein J. Nanotechnol.

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Visible-light-driven photocatalysis using layered materials has garnered increasing attention regarding the degradation of organic dyes. Herein, transition-metal dichalcogenides MoS2 and WS2 prepared by chemical vapor deposition as well as their intermixing are evaluated for photodegradation (PD) of methylene blue under solar simulator irradiation. Our findings revealed that WS2 exhibited the highest PD efficiency of 67.6% and achieved an impressive PD rate constant of 6.1 × 10−3 min−1. Conversely, MoS2 displayed a somewhat lower PD performance of 43.5% but demonstrated remarkable stability. The intriguing result of this study relies on the synergetic effect observed when both MoS2 and WS2 are combined in a ratio of 20% of MoS2 and 80% of WS2. This precise blend resulted in an optimized PD efficiency and exceptional stability reaching 97% upon several cycles. This finding underscores the advantageous outcomes of intermixing WS2 and MoS2, shedding light on the development of an efficient and enduring photocatalyst for visible-light-driven photodegradation of methylene blue.

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Section: Resultsmentioning

confidence: 99%

“…Moreover, when MoS 2 is mixed with SnO 2 , the MB photodegradation reaches up to ≈99.5% within 5 min. This rapid degradation occurred when 400 mg/L of the catalyst was used to degrade 3.2 mg/L of MB [ 24 ]. These results concerned materials fabricated using the hydrothermal technique, involving multiple processing stages.…”

Section: Introductionmentioning

confidence: 99%

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

Al Qaydi,

Rajput,

Lejeune

et al. 2024

Beilstein J. Nanotechnol.

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“…26 MoS 2 is considered to be one of the most popular two-dimensional materials due to its unique catalytic properties. 27,28 Up until now, MoS 2 has been used for photodegradation 29 and for catalytic hydrogen precipitation 30 because of its abundant activation sites. When MoS 2 is introduced into lithium−sulfur batteries, there are strong binding forces between the Mo atoms and the polysulfides.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to introduce catalytic active substances, such as transition metal sulfides, to the battery system . MoS 2 is considered to be one of the most popular two-dimensional materials due to its unique catalytic properties. , Up until now, MoS 2 has been used for photodegradation and for catalytic hydrogen precipitation because of its abundant activation sites. When MoS 2 is introduced into lithium–sulfur batteries, there are strong binding forces between the Mo atoms and the polysulfides. , The abundant active sites on the surface of MoS 2 provide a reaction space for the catalytic conversion of LiPS, thus reducing the shuttle effect.…”

Section: Introductionmentioning

confidence: 99%

A Heterostructured Gel Polymer Electrolyte Modified by MoS₂ for High-Performance Lithium–Sulfur Batteries

Chi,

Ding,

Ding

et al. 2023

ACS Appl. Mater. Interfaces

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In Li−S batteries, the shuttle effect of polysulfide lithium (LiPS) on the cathode side and the growth of lithium dendrites on the anode side are two major problems that lead to an insufficient cycle life. Herein, in light of the challenges brought on by the different chemical environments on both sides of Li−S batteries, a heterostructured poly(ethyl acrylate-co-ionic liquid) gel electrolyte with a single-sided electrocatalytic reduced graphene oxide/MoS 2 coating (MoS 2 @rGO-GPE) was developed in order to assemble a high-performance Li−S battery with a self-supporting graphene sulfur cathode. In such a device architecture, there is multiposition suppression of the shuttle effect; that is, the confinement of the graphene foam, the catalysis of the MoS 2 composite, and the capture of the gel polymer electrolyte. Our results show that the ionic conductivity of the heterostructured electrolyte is 1.98 mS cm −1 , and the Li ion transference number reaches 0.81. The assembled lithium−sulfur battery displays a high initial discharge capacity of 1027 mAh g −1 at 0.1 C, superior cycle stability (80% capacity retention after 500 cycles), and excellent rate performance. This design strategy provides a valuable route for the development of high-performance lithium−sulfur batteries.

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“…The obtained photocatalysts were also used in the Cr(VI) photoreduction process at pH 3. It is well known that under acidic conditions, Cr(VI) is mainly present in the form of HCrO , which eventually promotes the reduction of Cr(VI) to Cr(III) 57 . As in the case of the photodegradation of MB, the composite was characterized by a better reduction efficiency of the chromium compound.…”

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confidence: 99%

New light on the photocatalytic performance of NH4V4O10 and its composite with rGO

Nadolska

Szkoda

Trzciński

et al. 2023

Sci Rep

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Solar-driven photocatalysis has shown great potential as a sustainable wastewater treatment technology that utilizes clean solar energy for pollutant degradation. Consequently, much attention is being paid to the development of new, efficient and low-cost photocatalyst materials. In this study, we report the photocatalytic activity of NH4V4O10 (NVO) and its composite with rGO (NVO/rGO). Samples were synthesized via a facile one-pot hydrothermal method and successfully characterized using XRD, FTIR, Raman, XPS, XAS, TG-MS, SEM, TEM, N2 adsorption, PL and UV‒vis DRS. The results indicate that the obtained NVO and NVO/rGO photocatalysts exhibited efficient absorption in the visible wavelength region, a high content of V4+ surface species and a well-developed surface area. Such features resulted in excellent performance in methylene blue photodegradation under simulated solar light illumination. In addition, the composite of NH4V4O10 with rGO accelerates the photooxidation of the dye and is beneficial for photocatalyst reusability. Moreover, it was shown that the NVO/rGO composite can be successfully used not only for the photooxidation of organic pollution but also for the photoreduction of inorganic pollutants such as Cr(VI). Finally, an active species trapping experiment was conducted, and the photodegradation mechanism was discussed.

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SnO2 nanoparticles embedded onto MoS2 nanoflakes - An efficient catalyst for photodegradation of methylene blue and photoreduction of hexavalent chromium

Cited by 16 publications

References 71 publications

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

A Heterostructured Gel Polymer Electrolyte Modified by MoS₂ for High-Performance Lithium–Sulfur Batteries

New light on the photocatalytic performance of NH4V4O10 and its composite with rGO

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SnO2 nanoparticles embedded onto MoS2 nanoflakes - An efficient catalyst for photodegradation of methylene blue and photoreduction of hexavalent chromium

Cited by 16 publications

References 71 publications

Intermixing of MoS2 and WS2 photocatalysts toward methylene blue photodegradation

Intermixing of MoS2 and WS2 photocatalysts toward methylene blue photodegradation

A Heterostructured Gel Polymer Electrolyte Modified by MoS2 for High-Performance Lithium–Sulfur Batteries

New light on the photocatalytic performance of NH4V4O10 and its composite with rGO

Contact Info

Product

Resources

About

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

A Heterostructured Gel Polymer Electrolyte Modified by MoS₂ for High-Performance Lithium–Sulfur Batteries