Synergistic photocatalysis: harnessing WSe2-ZnO nanocomposites for efficient malachite green dye degradation

Abutaleb, Ahmed; Ahmed, Shahzad; Imran, Mohd

doi:10.1140/epjp/s13360-023-04670-2

Cited by 20 publications

(10 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…39 ZnO nanostructures have been found to possess significant significance in acting as active sites for various biological events. 40 These include their favorable electrical transport properties, a wide band gap of 3.37 eV, and a significant exciton binding energy of 60 meV. 41 Moreover, ZnO displays characteristics of semiconductivity, piezoelectricity, and ultraviolet (UV) protection.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The use of nanostructured wide band gap ZnO materials has garnered significant attention due to its diverse array of geometric configurations, absence of toxicity, chemical durability, high isoelectric point, favorable electrocatalytic properties, and compatibility with biological systems . ZnO nanostructures have been found to possess significant significance in acting as active sites for various biological events . These include their favorable electrical transport properties, a wide band gap of 3.37 eV, and a significant exciton binding energy of 60 meV .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electronic Tongue Based on ZnO/ITO@glass for Electrochemical Monitoring of Spiciness Levels

Ahmed,

Ansari,

Bishwanathan

et al. 2024

Langmuir

Self Cite

View full text Add to dashboard Cite

Capsaicin, a chemical compound present in chili peppers, is widely acknowledged as the main contributor to the spicy and hot sensations encountered during consumption. Elevated levels of capsaicin can result in meals being excessively spicy, potentially leading to health issues, such as skin burning, irritation, increased heart rate and circulation, and discomfort in the gastrointestinal system and even inducing nausea or diarrhea. The level of spiciness that individuals can tolerate may vary, so what may be considered incredibly hot for one person could be mild for another. To ensure food safety, human healthcare, regulatory compliance, and quality control in spicy food products, capsaicin levels must be measured. For these purposes, a reliable and stable sensor is required to quantify the capsaicin level. To leverage the effect of zinc oxide (ZnO), herein, we demonstrated the one-step fabrication process of an electronic tongue (E-Tongue) based on an electrochemical biosensor for the determination of capsaicin. ZnO was electrodeposited on the indium tin oxide (ITO) surface. The biosensor demonstrated the two notable linear ranges from 0.01 to 50 μM and from 50 to 500 μM with a limit of detection (LOD) of 2.1 nM. The present study also included the analysis of real samples, such as green chilis, red chili powder, and dried red chilis, to evaluate their spiciness levels. Furthermore, the E-Tongue exhibited notable degrees of sensitivity, selectivity, and long-term stability for a duration of more than a month. The development of an E-Tongue for capsaicin real-time monitoring as a point-of-care (POC) device has the potential to impact various industries and improve safety, product quality, and healthcare outcomes.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electronic Tongue Based on ZnO/ITO@glass for Electrochemical Monitoring of Spiciness Levels

Ahmed,

Ansari,

Bishwanathan

et al. 2024

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…6 However, the photocatalytic degradation method offers distinct advantages over traditional removal methods, such as light-induced reactions and mild reaction conditions, reducing the need for harsh chemicals and being environmentally friendly, contributing to the sustainability of the overall remediation process. 7,8 Two-dimensional (2D) materials are substances with a thickness of just one or two atoms. 9,10 These materials possess distinctive and noteworthy electrical, optical, thermal, and mechanical characteristics as a result of their decreased dimensionality.…”

Section: ■ Introductionmentioning

confidence: 99%

Hydrothermally Synthesized Z-Scheme Nanocomposite of ZIF-9 Modified MXene for Photocatalytic Degradation of 4-Chlorophenol

Alamier,

Ali,

Qudsieh

et al. 2024

Langmuir

Self Cite

View full text Add to dashboard Cite

4-Chlorophenol (4CP) is a well-known environmental contaminant often detected in wastewater, generally arising from industrial processes such as chemical manufacture, pharmaceutical production, and pesticide formulation. 4CP is a matter of great concern since it is persistent and has the potential to have harmful impacts on both aquatic ecosystems and human health, owing to its hazardous and mutagenic properties. Hence, degradation of 4CP is of utmost significance. This research investigates the photocatalytic degradation of 4CP using a novel Z-scheme heterojunction nanocomposite composed of MXene and ZIF-9. The nanocomposite is synthesized through a two-step hydrothermal method and thoroughly characterized by using XRD, SEM, UV−visible spectroscopy, zeta potential, and electrochemical impedance spectroscopy studies, confirming successful fabrication with improved surface properties. The comparative photocatalytic degradation studies between pristine materials and the nanocomposite were performed, and significant enhancement in performance was observed. The effect of pH on the degradation efficiency is also explored and correlated with the surface charge. The Z-scheme photocatalysis mechanism is proposed, which is supported by time-resolved photoluminescence studies and scavenger experiments. The reusability of the nanocomposite is also evaluated. The study contributes to the development of efficient and sustainable photocatalysts for wastewater treatment.

show abstract

“…ZnO is chemically stable, environmental-friendly, low-cost and abundant. The surface morphology of the ZnO plays an important factor in the surface area and degradation efficiency of the ZnO [19]. Therefore, there are several reports controlling the growth and morphology of ZnO including nanorods, nanotube, nanosheets and nanorods like morphologies.…”

Section: Introductionmentioning

confidence: 99%

ZnO/ZIF-8 nanocomposite for orange G dye degradation: synthesis, characterization, photocatalytic activity, and mechanism

Bakather

2024

Phys. Scr.

View full text Add to dashboard Cite

Textile dyes are one of the dominant reasons for water pollution. Among these dyes, Orange G is toxic, carcinogenic, and non-biodegradable and can cause a severe threat to humans and marine life. Therefore, in this present work, a novel photocatalyst was synthesized and systematic degradation of Orange G dye was investigated. The novel ZnO/ZIF-8 nanocomposite has been successfully synthesized via a two-step method, thermal decomposition for ZnO and wet-chemical method for ZnO/ZIF-8 nanocomposite. The band gap of the nanocomposite was calculated using a KM plot and found to be 3.5 eV. The surface charge of the materials was examined using zeta potential measurement which is found to be suitable for the dye degradation. The recombination time of the materials was investigated using Time-Resolved Photoluminescence (TRPL) study and it was found that nanocomposite has a lower recombination rate than pristine materials. The degradation efficiency of materials towards Orange G dye was calculated to be ~95% after 120 min illumination. The photocatalysis mechanism was proposed on the basis of Mott-Schottky measurements which were supported by the scavenger test. Furthermore, to evaluate the reusability of the nanocomposite photocatalytic experiment was conducted several times. The ZnO/ZIF-8 nanocomposite could be used for the degradation of textile dye wastewater.

show abstract

Synergistic photocatalysis: harnessing WSe2-ZnO nanocomposites for efficient malachite green dye degradation

Cited by 20 publications

References 44 publications

Electronic Tongue Based on ZnO/ITO@glass for Electrochemical Monitoring of Spiciness Levels

Electronic Tongue Based on ZnO/ITO@glass for Electrochemical Monitoring of Spiciness Levels

Hydrothermally Synthesized Z-Scheme Nanocomposite of ZIF-9 Modified MXene for Photocatalytic Degradation of 4-Chlorophenol

ZnO/ZIF-8 nanocomposite for orange G dye degradation: synthesis, characterization, photocatalytic activity, and mechanism

Contact Info

Product

Resources

About