Synthesis of novel and environmental sustainable AgI-Ag2S nanospheres impregnated g-C3N4 photocatalyst for efficient degradation of aqueous pollutants

Velmurugan, Sethupathi; Balu, Sridharan; Palanisamy, Selvakumar; Yang, Thomas C.-K.; Velusamy, Vijayalakshmi; Chen, Shih Wen; El-Shafey, El Said I

doi:10.1016/j.apsusc.2019.143991

Cited by 63 publications

(12 citation statements)

References 59 publications

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“…AgI-Ag 2 S heterostructures show a high photothermal efficiency (50%-60%). 77 Ag 2 S-Ag heterostructure nanotubes manifest excellent photocatalytic activity for degradation of methyl orange (MO) and reduction of aqueous Cr VI . 78 The ZnO/Ag 2 S heterostructure shows superior photovoltaic performance and photoconductivity in the whole visible-light region, and shows a photoelectric ethanol-sensing property induced by visible light.…”

Section: Room-temperature Plastic Inorganic Semiconductor Ag 2 Smentioning

confidence: 99%

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Room‐temperature plastic inorganic semiconductors for flexible and deformable electronics

Chen

Wei

Zhao

et al. 2020

InfoMat

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Flexible electronics ushers in a revolution to the electronics industry in the 21st century. Ideally, all components of a flexible electronic device including the functional component shall comply with the deformation to ensure the structural and functional integrity, imposing a pressing need for developing roomtemperature strain-tolerant semiconductors. To this end, there is a long-standing material dilemma: inorganic semiconductors are typically brittle at room temperature except for size-induced flexibility; by contrast, organic semiconductors are intrinsically soft and flexible but the electrical performance is poor. This is why the discovery of bulk plasticity in Ag 2 S at room temperature and ZnS in darkness is groundbreaking in solving this long-standing material dilemma between the mechanical deformability and the electrical performance. The present review summarizes the background knowledge and latest advances in the emerging field of plastic inorganic semiconductors. At the outset, we argue that the plasticity of inorganic semiconductors is vital to strain tolerance of electronic devices, which has not been adequately emphasized. The mechanisms of plasticity are illustrated from the perspective of chemical bonding and dislocations. Plastic inorganic materials, for example, ionic crystals (insulators), ZnS in darkness, and Ag 2 S, are discussed in detail in terms of their prominent mechanical properties and potential applications. We conclude the article with several key scientific and technological questions to address in the future study.

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Section: Room-temperature Plastic Inorganic Semiconductor Ag 2 Smentioning

confidence: 99%

“…Peculiar properties were also observed in Ag 2 S‐based heterostructures. AgI‐Ag 2 S heterostructures show a high photothermal efficiency (50%‐60%) 77 . Ag 2 S‐Ag heterostructure nanotubes manifest excellent photocatalytic activity for degradation of methyl orange (MO) and reduction of aqueous Cr VI 78 .…”

Section: Plastic Inorganic Materialsmentioning

confidence: 99%

Room‐temperature plastic inorganic semiconductors for flexible and deformable electronics

Chen

Wei

Zhao

et al. 2020

InfoMat

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“…Generally, organic pollutants and toxic contaminants are stable and hard to remove or degrade by traditional biochemical treatment. Recently, various technologies have been proposed for the remediation of pollutants, such as adsorption, oxidation process, photocatalysis, ion exchange process, metal–organic framework (MOF), and biodegradation. − Qiu et al studied the advantages and properties of biochar-based catalysts and their applications in the photocatalytic removal of organic contaminants. , Among them, photocatalysis is considered a green and facile suitable technology for treating contaminated water. ,,,− The synthesis of high-performance heterogeneous photocatalysis has become one of the most popular research areas, as this method is eco-friendly, low-cost, and highly effective. − In addition, this method may lead to the degradation of organic/inorganic contaminants into harmless components. , Metal oxide semiconductors based on photocatalysts have shown a promising capacity for the decomposition of organic contaminants. , Recently, various metal oxide-based semiconductors, such as BiOCl, SnO 2 , CeO 2 , NiO 2 , TiO 2 , and MnO 2 , have attracted wide attention due to their good stability and low toxicity. Moreover, Yao et al reported various modified routes for the synthesis of BiOCl and used them in the photocatalysis of organic contaminates .…”

Section: Introductionmentioning

confidence: 99%

Direct Z-Scheme AgBr/β-MnO₂Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity

Warshagha

Danish

2022

ACS Omega

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The preparation of visible light-responsive efficient photocatalysts for removing organic contaminants from water and killing cancer cells has gotten a lot of attention due to the growing global concern. In this study, we have successfully fabricated an efficient AgBr/β-MnO 2 nanocomposite via a facile deposition and precipitation method at room temperature. Techniques such as XRD, SEM-EDS, TEM, DRS, PL, EIS, ESR, and FTIR were used to determine the crystalline, structural, morphological, optical, and other properties. The SEM and TEM analyses reveal that AgBr NPs are decorated on the surface of β-MnO 2 , which possesses rods with a sphere-like structure for AgBr/β-MnO 2 . The EDX analysis confirms the existence of Mn, O, Ag, and Br elements in the nanocomposites without an extra peak, indicating that the synthesized samples are highly pure. The high photocatalytic performance of AgBr/β-MnO 2 could be attributed to the formation of Ag NPs and the construction of the Z-scheme heterojunction between AgBr and β-MnO 2 . This may enhance fast light absorption and efficient photogenerated (e–/h+) pairs, as indicated by EIS and photoluminescence measurements, which in turn achieved high activity for the decomposition of MB (97%, in 12 min), RhB (98.9%, in 9 min), and paracetamol (80%, in 180 min), respectively. The kinetic model study proposed that the first-order model showed a better fit than the zero- and second-order for the photocatalytic decolorization of RhB dye. XRD analysis of 0.2 AgBr/β-MnO 2 before and after recycling confirms the high stability of the catalyst. HPLC results showed that no detectable by-products are produced through the decomposition of paracetamol. Interestingly, 0.2 AgBr/β-MnO 2 nanocomposites showed visible light-induced anticancer activity against A549 cancer cell lines. The mechanistic degradation pathway has been proposed using the involvement of active species like superoxide radicals ( −• O 2 ) and photoinduced holes (h + ). The proposed work focuses on synthesizing effective photocatalysts in a less hazardous environment with superior biological activity.

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“…Though, the poor charge separation competence and faster recombination of photogenerated charge carriers limit its application as a photocatalyst. 19,20 To overcome the difficulties, several approaches have been employed together with doping of metal (Fe, Co, Ni, and Cu) or nonmetal (B, O, P, and S), coupling with noble metal (Pd, Ag, Au, and Pt) nanoparticles, and constructing a heterojunction with other semiconducting materials such as a metal oxide (TiO 2 , BiVO 4 , ZnO, and Fe 2 O 3 ) or metal chalcogenides (CdS, ZnS, CuS, and MoS 2 ). 21−40 Among all, the designing of heterojunction is considered to be an effective approach and promisingly retards the photogenerated charge carrier recombination.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Graphitic carbon nitride (GCN) is a nonmetal–organic semiconductor material that offers a larger surface area, excellent visible light activity, and low cost. Though, the poor charge separation competence and faster recombination of photogenerated charge carriers limit its application as a photocatalyst. , To overcome the difficulties, several approaches have been employed together with doping of metal (Fe, Co, Ni, and Cu) or nonmetal (B, O, P, and S), coupling with noble metal (Pd, Ag, Au, and Pt) nanoparticles, and constructing a heterojunction with other semiconducting materials such as a metal oxide (TiO 2 , BiVO 4 , ZnO, and Fe 2 O 3 ) or metal chalcogenides (CdS, ZnS, CuS, and MoS 2 ). − Among all, the designing of heterojunction is considered to be an effective approach and promisingly retards the photogenerated charge carrier recombination . The two-dimensional (2D) molybdenum disulfide (MoS 2 ) is a category of transition metal dichalcogenide, and it has received enormous attention in the past and recent decades.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High-Performance Molybdenum Disulfide–Graphitic Carbon Nitride p–n Heterojunction Stabilized rGO/ITO Photoelectrode for Photoelectrochemical Determination of Dopamine

Velmurugan

Yang

2020

ACS Appl. Electron. Mater.

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The construction of solar active photoelectrodes for photoelectrochemical purposes based on a heterojunction platform is one of the most promising strategies. Herein, a molybdenum disulfide–graphitic carbon nitride (MoS2–GCN) p–n heterojunction stabilized reduced graphene oxide/indium tin oxide (rGO/ITO) photoelectrode was fabricated and has been employed for the photoelectrochemical detection of the neurotransmitter dopamine (DA). First, the rGO was electrochemically reduced on an ITO slice in GO dispersion (pH = 7, −1.5–0 V potential window for 30 cycles) by using the cyclic voltammetry technique, and then the MoS2–GCN heterostructure was immobilized on rGO/ITO by the drop-casting method. The physicochemical characterization of the fabricated electrodes was performed by means of XRD, Raman, UV–vis DRS, EIS, PL, and SEM techniques. The type of MoS2 and GCN semiconductors and the p–n heterojunction formation between the MoS2 and GCN were investigated through the Hall effect and Mott–Schottky analyses. The fabricated electrode shows an enhanced photocurrent activity at 535 nm, which is confirmed from the UV-DRS measurement. The MoS2–GCN/rGO/ITO shows photoelectrochemical detection activity of dopamine in the linear response of 0.005–1271.93 μM with the detection limit of 1.6 nM. This MoS2–GCN/rGO/ITO electrode was tested for the determination of dopamine in human urine and serum samples.

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Synthesis of novel and environmental sustainable AgI-Ag2S nanospheres impregnated g-C3N4 photocatalyst for efficient degradation of aqueous pollutants

Cited by 63 publications

References 59 publications

Room‐temperature plastic inorganic semiconductors for flexible and deformable electronics

Room‐temperature plastic inorganic semiconductors for flexible and deformable electronics

Direct Z-Scheme AgBr/β-MnO₂Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity

Fabrication of High-Performance Molybdenum Disulfide–Graphitic Carbon Nitride p–n Heterojunction Stabilized rGO/ITO Photoelectrode for Photoelectrochemical Determination of Dopamine

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Synthesis of novel and environmental sustainable AgI-Ag2S nanospheres impregnated g-C3N4 photocatalyst for efficient degradation of aqueous pollutants

Cited by 63 publications

References 59 publications

Room‐temperature plastic inorganic semiconductors for flexible and deformable electronics

Room‐temperature plastic inorganic semiconductors for flexible and deformable electronics

Direct Z-Scheme AgBr/β-MnO2Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity

Fabrication of High-Performance Molybdenum Disulfide–Graphitic Carbon Nitride p–n Heterojunction Stabilized rGO/ITO Photoelectrode for Photoelectrochemical Determination of Dopamine

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Direct Z-Scheme AgBr/β-MnO₂Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity