Sulfur-doped 2D/3D carbon nitride-based van der Waals homojunction with superior photocatalytic hydrogen evolution and wastewater purification

Xing, Weiyi; Zhang, Yichi; Zou, Jinghui; Zhang, Tingting; Liu, Chaoke; Wu, Guangyu; Chen, Gang

doi:10.1016/j.ijhydene.2022.02.006

Cited by 28 publications

(6 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…38 It's well known that Ag-NPs can serve as electron acceptors to capture photogenerated electrons produced by photoexcitation, averting the rapid recombination of photogenerated electrons and holes. 39,40 This supports the narrower band gap of ZA/NWF. Therefore, it can be drawn that the ZA/NWF sample possesses significant utilization of visible light.…”

Section: Optical Property Analysissupporting

confidence: 67%

In situ deposition of Ag/Zn-MOFs on the surface of non-woven fabrics for effective antibacterial activity

Zhu

Mao

Rong

et al. 2022

Journal of Industrial Textiles

View full text Add to dashboard Cite

Metal-organic frameworks nanocomposites emerged as a novel functional material that has been reported to combine with metal nanoparticles for enhancing antibacterial activity through synergy. Herein, Ag nanoparticles and zinc-metal-organic frameworks nanocomposites are successfully in-situ synthesized on the surface of non-woven fabrics carrier via solution-immerse-growth method. The obtained product (ZA/NWF) shows superior utilization of visible light than the sample that prepared without Ag nanoparticles. Moreover, the generated reactive oxygen species by ZA/NWF is also more abundant, which indicates the effective visible light utilization of the as-obtained material. ZA/NWF shows considerable bactericidal effect against Escherichia coli with a nearly 100% bactericidal rate under visible light illumination, which is significantly higher than that of Zn2+ (70.3%) and 2-methylimidazole (71.8%). A proposed antibacterial mechanism suggests that hydroxyl radical (·OH) and superoxide radicals (·O2-) generated during the antibacterial process are conducive to the inhibition of Escherichia coli and Staphylococcus aureus. Additionally, ZA/NWF shows comparable sterilization efficiency of over 95% after the sixth antibacterial assay. Overall, a facile and convenient antibacterial material integrated structure and property is presented in this work and the composite with competitive photocatalytic antibacterial activity can be potentially applied in the large-scale antibacterial study.

show abstract

Section: Optical Property Analysissupporting

confidence: 67%

In situ deposition of Ag/Zn-MOFs on the surface of non-woven fabrics for effective antibacterial activity

Zhu

Mao

Rong

et al. 2022

Journal of Industrial Textiles

View full text Add to dashboard Cite

show abstract

“…2 shows XRD patterns of the g-C3N4-M, g-C3N4-U, and g-C3N4-MU samples to understand their crystalline structure and phase composition. For the case of g-C3N3-M, in contrast to the peaks seen at 2θ of 13.12 o , which is related to (1 0 0) crystal planes of g-C3N4, the strong peak at 2θ of 27.61 o reflects the (0 0 2) crystal plane of g-C3N4 comprising typical aromatic ring with interlayers [12]. Furthermore, g-C3N4 synthesized using urea (g-C3N4-U) has several peaks.…”

Section: Xrd Analysismentioning

confidence: 85%

“…Surface defects can alter the structure and morphology, preventing charges from recombining and releasing additional active sites [9,10]. Recently, it was reported that structural surface defects significantly decrease photoinduced charge carrier recombination and boost the mobility of electrons inside the layered surface [11,12]. Numerous surface-active sites are present in the porous structure of g-C3N4, which considerably increases photoactivity [13].…”

Section: Introductionmentioning

confidence: 99%

A Single-Step Synthesis of Defective Graphitic Carbines from Melamine and Urea for Photocatalytic Applications

Tahir,

Hamouda,

Hassanr

2023

International Conference of Recent Trends in Environmental Science and Engineering

View full text Add to dashboard Cite

Recently, there has been a growing interest in relying on photocatalytic technology for producing renewable fuels such as hydrogen and other environmental applications. The success of photocatalysis, however, requires developing visible light-responsive photocatalysts for the continuous production of H2 and other value-added chemicals. Graphitic carbon nitride (g-C3N4) is a promising material but has diminished photocatalytic ability. This work aims to design and develop visible light responsive g-C3N4 using a singlestep hydrothermal approach. The g-C3N4 was prepared through the thermal decomposition of melamine (named g-C3N4-M), urea (named g-C3N4-U), and a mixture of melamine-urea (named g-C3N4-MU). The samples were characterized using X-ray diffraction (XRD), UVvisible, and photoluminescence to assess the successful conversion to g-C3N4. XRD results revealed that urea was not successfully converted to g-C3N4; however, melamine was fully converted to g-C3N4. Interestingly, when melamine and urea were mixed as a fixed bed, the mix was successfully converted to defective g-C3N4. Visible light responsiveness was confirmed by the results of UV-visible analysis for all three materials. In the case of melamine, a higher visible light response was obtained (~482 nm), whereas g-C3N4-MU had slightly lower visible light absorption (~ 471 nm) due to the interaction of defects within the surface. These findings were further confirmed through photoluminescence analysis. The highest charge carrier recombination was obtained using g-C3N4-M, whereas charge separation was improved in the g-C3N4-U sample due to the presence of g-C3N4 composites and other intermediates. The highest charge separation ability was achieved for the g-C3N4-MU. This revealed that mixing melamine and urea is a promising approach for the singlestep synthesis of defective g-C3N4 with a higher ability for visible light absorption and photoinduced charge carrier separation. The findings of this work would be beneficial in different areas, such as solar energy conversion, greenhouse gas reduction, and wastewater degradation.

show abstract

“…Moreover, van der Waals (vdW) heterostructures, formed from weak vdW force between different materials, aroused interests from scientists due to its constructing relatively suitable band gap and close interface. , For example, Jin et al constructed a van der Waals heterostructure between CN and Bi 3 O 4 Cl, which possesses a higher CO 2 reduction performance than raw materials. The formation of the vdW heterostructure enables the acceleration of the electron transfer speed on the surface of two raw materials to increase the separation of holes and electrons .…”

Section: Introductionmentioning

confidence: 99%

0D/2D Van Der Waals Heterojunction of N,S-Organic Dots/g-C₃N₄ Nanosheets for Boosted Photocatalytic Hydrogen Evolution

Liu

Tai

et al. 2022

Energy Fuels

View full text Add to dashboard Cite

Using solar energy to efficiently decompose water to produce hydrogen under visible light is a kind of promising green energy. A great number of hybrid materials have been developed as catalysts for photolysis of water to hydrogen. However, these photocatalysts are still limited by fast electron–hole recombination or their low quantum efficiency. In this study, novel N,S-organic dots (NSOD) were combined with g-C3N4 (CN) by ultrasonic self-assembly to form a new NSOD/CN van der Waals heterojunction photocatalyst. Photocatalytic hydrogen production of the NSOD/CN van der Waals heterojunction reached 1369.5 μmol h–1 g–1, and the efficiency is 4.25 times higher than CN. The improvement in performance is due to the formation of the van der Waals heterojunction between NSOD and CN, which effectively promotes charge separation and electron transfer. Meanwhile, the introduction of NSOD is beneficial for the visible light response of the photocatalyst. This paper reports an effective reference to construct a novel van der Waals heterojunction for applications in the field of energy conversion.

show abstract

Sulfur-doped 2D/3D carbon nitride-based van der Waals homojunction with superior photocatalytic hydrogen evolution and wastewater purification

Cited by 28 publications

References 37 publications

In situ deposition of Ag/Zn-MOFs on the surface of non-woven fabrics for effective antibacterial activity

In situ deposition of Ag/Zn-MOFs on the surface of non-woven fabrics for effective antibacterial activity

A Single-Step Synthesis of Defective Graphitic Carbines from Melamine and Urea for Photocatalytic Applications

0D/2D Van Der Waals Heterojunction of N,S-Organic Dots/g-C₃N₄ Nanosheets for Boosted Photocatalytic Hydrogen Evolution

Contact Info

Product

Resources

About

Sulfur-doped 2D/3D carbon nitride-based van der Waals homojunction with superior photocatalytic hydrogen evolution and wastewater purification

Cited by 28 publications

References 37 publications

In situ deposition of Ag/Zn-MOFs on the surface of non-woven fabrics for effective antibacterial activity

In situ deposition of Ag/Zn-MOFs on the surface of non-woven fabrics for effective antibacterial activity

A Single-Step Synthesis of Defective Graphitic Carbines from Melamine and Urea for Photocatalytic Applications

0D/2D Van Der Waals Heterojunction of N,S-Organic Dots/g-C3N4 Nanosheets for Boosted Photocatalytic Hydrogen Evolution

Contact Info

Product

Resources

About

0D/2D Van Der Waals Heterojunction of N,S-Organic Dots/g-C₃N₄ Nanosheets for Boosted Photocatalytic Hydrogen Evolution