One-step synthesis of phosphorus-doped g-C3N4/Co3O4 quantum dots from vitamin B12 with enhanced visible-light photocatalytic activity for metronidazole degradation

Zhao, Zhiwei; Fan, Junyu; Deng, Xiaoyong; Liu, Jie

doi:10.1016/j.cej.2018.10.239

Cited by 88 publications

(15 citation statements)

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“…Melting points are substituent dependent, [Cu(S 2 CNEt 2 ) 2 ] melting at ca. 200 • C and (modest) increases in volatility are seen for longer alkyl-chain derivatives [7,63,64]. Most of them degrade at 230-300 • C to generate a range of copper sulfides, and this makes them excellent single-source precursors (SSPs) (as will be discussed later).…”

Section: Copper(ii) Bis(dithiocarbamate) Complexesmentioning

confidence: 99%

“…[Cu(S 2 CNEt 2 ) 2 ] melts at ca. 200 • C and decomposes at 230-300 • C [63], and upon increasing the length of the alkyl chain, some small changes in volatility result [7]. Introduction of fluorine, as in [Cu(S 2 CN(CH 2 CF 3 ) 2 )], significantly reduces the decomposition temperature to 130 • C and this SSP has been used to deposit high-quality, phase-pure, chalcocite films [172].…”

Section: Binary Copper Sulfidesmentioning

confidence: 99%

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Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond

Hogarth

Onwudiwe

2021

Inorganics

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Copper dithiocarbamate complexes have been known for ca. 120 years and find relevance in biology and medicine, especially as anticancer agents and applications in materials science as a single-source precursor (SSPs) to nanoscale copper sulfides. Dithiocarbamates support Cu(I), Cu(II) and Cu(III) and show a rich and diverse coordination chemistry. Homoleptic [Cu(S2CNR2)2] are most common, being known for hundreds of substituents. All contain a Cu(II) centre, being either monomeric (distorted square planar) or dimeric (distorted trigonal bipyramidal) in the solid state, the latter being held together by intermolecular C···S interactions. Their d9 electronic configuration renders them paramagnetic and thus readily detected by electron paramagnetic resonance (EPR) spectroscopy. Reaction with a range of oxidants affords d8 Cu(III) complexes, [Cu(S2CNR2)2][X], in which copper remains in a square-planar geometry, but Cu–S bonds shorten by ca. 0.1 Å. These show a wide range of different structural motifs in the solid-state, varying with changes in anion and dithiocarbamate substituents. Cu(I) complexes, [Cu(S2CNR2)2]−, are (briefly) accessible in an electrochemical cell, and the only stable example is recently reported [Cu(S2CNH2)2][NH4]·H2O. Others readily lose a dithiocarbamate and the d10 centres can either be trapped with other coordinating ligands, especially phosphines, or form clusters with tetrahedral [Cu(μ3-S2CNR2)]4 being most common. Over the past decade, a wide range of Cu(I) dithiocarbamate clusters have been prepared and structurally characterised with nuclearities of 3–28, especially exciting being those with interstitial hydride and/or acetylide co-ligands. A range of mixed-valence Cu(I)–Cu(II) and Cu(II)–Cu(III) complexes are known, many of which show novel physical properties, and one Cu(I)–Cu(II)–Cu(III) species has been reported. Copper dithiocarbamates have been widely used as SSPs to nanoscale copper sulfides, allowing control over the phase, particle size and morphology of nanomaterials, and thus giving access to materials with tuneable physical properties. The identification of copper in a range of neurological diseases and the use of disulfiram as a drug for over 50 years makes understanding of the biological formation and action of [Cu(S2CNEt2)2] especially important. Furthermore, the finding that it and related Cu(II) dithiocarbamates are active anticancer agents has pushed them to the fore in studies of metal-based biomedicines.

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Section: Copper(ii) Bis(dithiocarbamate) Complexesmentioning

confidence: 99%

Section: Binary Copper Sulfidesmentioning

confidence: 99%

Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond

Hogarth

Onwudiwe

2021

Inorganics

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“…However, g-C3N4 prepared by the traditional thermal polymerization method has a high recombination rate of photogenerated electrons and holes due to grain boundaries generated by the high-temperature process, thus inhibiting its photocatalytic performance. Therefore, various tactics have been applied to boost its activity, such as nonmetal doping [29], noble metal deposition [30,31], and heterojunction construction [32][33][34][35]. The construction of a 2D/2D heterostructure photocatalyst is generally considered the best way to achieve the efficient separation of photoinduced electrons and holes, and finally strengthen its photocatalytic activity [26,[36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Novel S-scheme 2D/2D BiOBr/g-C3N4 heterojunctions with enhanced photocatalytic activity

Zhang

Liu

2021

Chinese Journal of Catalysis

249

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The design and construction of heterojunction photocatalysts, which possess a staggered energy band structure and appropriate interfacial contact, is an effective way to achieve outstanding photocatalytic performance. In this study, 2D/2D BiOBr/g-C3N4 heterojunctions were successfully obtained by a convenient in situ self-assembly route. Under simulated sunlight irradiation, 99% of RhB (10 mg•L -1 , 100 mL) was efficiently degraded by 1.5-BiOBr/g-C3N4 within 30 min, which is better than the performance of both BiOBr and g-C3N4, and it has superior stability. In addition, the composite also exhibits enhanced photocatalytic activity for H2 production. The enhanced activity can be attributed to the intimate interface contact, the larger surface area, and the highly efficient separation of photoinduced electron-hole pairs. Based on the experimental results, a novel S-scheme model was proposed to illuminate the transfer process of charge carriers. This study presents a simple way to develop novel step-scheme photocatalysts for environmental and related applications.

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“… 33 Moreover, composites of Co 3 O 4 have been used for persulfate activation, photocatalytic degradation, and supercapacitators applications. 34 , 35 Therefore, more work still needs to be done on applications of Co 3 O 4 heterojunctions with Bi-based semiconductors to improve the literacy and explore the possibility of enhancing the photocatalytic activity of Bi x O y I z heterostructures.…”

Section: Introductionmentioning

confidence: 99%

“…The variance in oxygen holes, oxygen defects, and oxygen adsorbed in different states of cobalt are thought to be the reason for high activity and selectivity of these metal oxide catalysts. , Moreover, cobalt(II, III) oxide is a p-type semiconductor with interesting properties such as high thermal and chemical stability, low solubility, interesting electronic, optical, magnetic, and catalytic properties, and a narrow band gap (approximately 1.2–2.1 eV) and also oxidation catalysis properties. , Luo et al fabricated a photostable composite of Co 3 O 4 -Mxene by employing a solvothermal method for degradation of methylene blue and rhodamine B . Moreover, composites of Co 3 O 4 have been used for persulfate activation, photocatalytic degradation, and supercapacitators applications. , Therefore, more work still needs to be done on applications of Co 3 O 4 heterojunctions with Bi-based semiconductors to improve the literacy and explore the possibility of enhancing the photocatalytic activity of Bi x O y I z heterostructures.…”

Section: Introductionmentioning

confidence: 99%

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Malefane

2020

ACS Omega

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Remediation of organic pollutant matrixes from wastewater by photodegradation using different heterojunctions is extensively studied to improve performance for potential application. Brilliant black (BB) and p -nitrophenol (PNP) have been detected in the environment and implicated as directly or indirectly carcinogenic to human health. This work analyzes their elimination from aqueous solutions under visible-light irradiation with composites of cobalt(II, III) oxide and bismuth oxyiodides (Co 3 O 4 /Bi 4 O 5 I 2 /Bi 5 O 7 I). The synthesized nanomaterial properties were investigated using various techniques such as BET, SEM/EDS, TEM, XRD, FTIR, PL, and UV–vis. All the nanocomposites absorbed in the visible range of the solar spectrum with band gaps between 1.68 and 2.79 eV, and the specific surface area of the CB2 composite increased by 35.8% from that of Bi 4 O 5 I 2 /Bi 5 O 7 I. There was an observed massive reduction in the rate of electron and hole recombination, and the band gaps of the composites decreased. The mineralization of PNP and BB was followed by determination of the total organic carbon with reductions of 93.6 and 83.7%, respectively. The main active species were the hydroxyl radicals, while the superoxide anion radical and generated holes were minor as confirmed by radical trapping experiments. The optimum pHs for degradation of PNP and BB were 9.6 and 5.3, respectively. The enhanced performance of the catalyst was due to C-scheme heterojunction formation that reduced the electron and hole recombination rate and was attributed to strong adsorption of the pollutants on the photocatalyst active surface. The nanocomposite is apposite for solar energy-driven remediation of organic pollutants from environmental aqueous samples.

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One-step synthesis of phosphorus-doped g-C3N4/Co3O4 quantum dots from vitamin B12 with enhanced visible-light photocatalytic activity for metronidazole degradation

Cited by 88 publications

References 79 publications

Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond

Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond

Novel S-scheme 2D/2D BiOBr/g-C3N4 heterojunctions with enhanced photocatalytic activity

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

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One-step synthesis of phosphorus-doped g-C3N4/Co3O4 quantum dots from vitamin B12 with enhanced visible-light photocatalytic activity for metronidazole degradation

Cited by 88 publications

References 79 publications

Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond

Copper Dithiocarbamates: Coordination Chemistry and Applications in Materials Science, Biosciences and Beyond

Novel S-scheme 2D/2D BiOBr/g-C3N4 heterojunctions with enhanced photocatalytic activity

Co3O4/Bi4O5I2/Bi5O7I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

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Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation