Cd(II)-based metal–organic framework-derived CdS photocatalysts for enhancement of photocatalytic activity

Ma, Ligang; Ai, Xiaoqian; Yang, Xingming; Cao, Xiaoxiao; Han, Dianrong; Song, Xiang; Jiang, Huilin; Yang, Wei; Yan, Sen; Wu, Xiaoshan

doi:10.1007/s10853-021-05855-9

Cited by 15 publications

(11 citation statements)

References 46 publications

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“…Further, the peak at 17.5° for NiCo MOF_BDC and NiCo MOF_BTC matches with the (220) crystal plane of Ni 3 (BTC) 2 ·12H 2 O (PDF #1274034), confirming the presence of benzene-carboxylic acid coordinations. The peak at 37.08° for NiCo MOF_2-Melm is from the 2-methylimizazole. , From the above discussion, the XRD patterns evidenced the formation of the NiCo MOF successfully with the different organic ligands. The TGA curve for all the NiCo MOF samples illustrated in Figure f shows a three-stage mass loss profile, first, the mass loss due to the evaporation of volatile components like H 2 O and functional groups, subsequently, the polymer component decomposition, and last, the combustion of material. ,, The volatile component evaporation starts immediately in the case of NiCo MOF_BTC ∼11.8%, i.e., more than the other MOFs, confirming the presence of highly volatile components physisorbed/chemisorbed to the highly open edges of the interconnected networked structure of NiCo MOF_BTC.…”

Section: Resultsmentioning

confidence: 77%

“…The peak at 37.08°f or NiCo MOF_2-Melm is from the 2-methylimizazole. 51,52 From the above discussion, the XRD patterns evidenced the formation of the NiCo MOF successfully with the different organic ligands. The TGA curve for all the NiCo MOF samples illustrated in Figure 2f shows a three-stage mass loss profile, first, the mass loss due to the evaporation of volatile components like H 2 O and functional groups, subsequently, the polymer component decomposition, and last, the combustion of material.…”

Section: Synthesis Of Nico Mofmentioning

confidence: 87%

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Ligand-Controlled Growth of Different Morphological Bimetallic Metal–Organic Frameworks for Enhanced Charge-Storage Performance and Quasi-Solid-State Hybrid Supercapacitors

Sahoo

Jeong

2023

ACS Appl. Mater. Interfaces

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The present research work facilitates a ligand-mediated effective strategy to achieve different morphological surface structures of bimetallic (Ni and Co) metal–organic frameworks (MOFs) by utilizing different types of organic ligands like terephthalic acid (BDC), 2-methylimidazole (2-Melm), and trimesic acid (BTC). Different morphological structures, rectangular-like nanosheets, petal-like nanosheets, and nanosheet-assembled flower-like spheres (NSFS) of NiCo MOFs, are confirmed from the structural characterization for ligands BDC, 2-Melm, and BTC, respectively. The basic characterization studies like scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and Brunauer–Emmett–Teller revealed that the NiCo MOF prepared by using trimesic acid as the ligand (NiCo MOF_BTC) with a long organic linker exhibits a three-dimensional architecture of NSFS that possesses higher surface area and pore dimensions, which enables better ion kinetics. Also, the NiCo MOF_BTC delivered the highest capacity of 1471.4 C g–1 (and 408 mA h g–1) at 1 A g–1 current density, compared to the other prepared NiCo MOFs and already reported different NiCo MOF structures. High interaction of trimesic acid with the metal ions confirmed from ultraviolet–visible spectroscopy and X-ray photoelectron spectroscopy leads to a NSFS structure of NiCo MOF_BTC. For practical application, an asymmetric supercapacitor device (NiCo MOF_BTC//AC) is fabricated by taking NiCo MOF_BTC and activated carbon as the positive and negative electrode, respectively, where the PVA + KOH gel electrolyte serves as a separator as well as an electrolyte. The device delivered an outstanding energy density of 78.1 Wh kg–1 at a power density of 750 W kg–1 in an operating potential window of 1.5 V. In addition, it displays a long cycle life of 5000 cycles with only 12% decay of the initial specific capacitance. Therefore, these findings manifest the morphology control of MOFs by using different ligands and the mechanism behind the different morphologies that will provide an effective way to synthesize differently structured MOF materials for future energy-storage applications.

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Section: Resultsmentioning

confidence: 77%

Section: Synthesis Of Nico Mofmentioning

confidence: 87%

Ligand-Controlled Growth of Different Morphological Bimetallic Metal–Organic Frameworks for Enhanced Charge-Storage Performance and Quasi-Solid-State Hybrid Supercapacitors

Sahoo

Jeong

2023

ACS Appl. Mater. Interfaces

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“…These degradation mechanisms have been widely discussed in the literature. Common catalyst semiconductors include CdS [ 10 ], ZnO [ 11 , 12 ], TiO 2 [ 13 ], and CuO [ 14 ], among others. However, in single-phase materials, the photogenerated electron-holes pairs excited by irradiation can easily recombine, significantly affecting the photodegradation performance [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Chen

et al. 2022

Nanomaterials

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The design and construct pn heterojunction to reduce the recombination rate of photogenerated electron-hole pairs can effectively improve photocatalytic activity. In this study, ZnO/NiO heterojunctions were fabricated by annealing a Zn/Ni metal organic framework precursor synthesized via coprecipitation. The effects of the precursor annealing temperature on the microstructure, morphology, and optical properties of the ZnO/NiO nanocomposites were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-vis absorption spectroscopy. The results showed that the nanocomposite was composed of hexagonal wurtzite ZnO and cubic NiO, with the former being the dominant phase. Large ZnO nanoparticles were attached to small NiO nanoparticles, and a pn heterojunction interface was formed. The photodegradation performance of the nanomaterials was evaluated by monitoring the degradation of RhB under irradiation by ultraviolet light. The ZnO/NiO nanocomposites exhibited excellent photocatalytic activity when the annealing temperature was 550 °C. The photodegradation mechanism was also analyzed in detail, revealing that the heterojunction between the n-type ZnO and the p-type NiO played an important role in impeding the recombination of photogenerated electron-hole pairs and improving the photocatalytic efficiency.

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“…On the whole, the photocatalysis of CdS nanorings was superior than CdS nanoparticles, which was attributed to the reasons as followings. Firstly, the hollow structure increased light re ection and scattering ability for light-harvesting [34]. Secondly, the higher E VB and lower E CB in nanorings contributed to stronger oxidizability of holes and stronger reducibility of electrons.…”

Section: Active Speciesmentioning

confidence: 99%

Hydrazine-induced synthesis of CdS nanorings for the application in photodegradation

Zheng

Wang

et al. 2023

Res Chem Intermed

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In this paper, CdS nanorings synthesized by facile hydrazine-induced microwave method for the photodegradation of pollutants has been reported for the rst time. Different reaction method, microwave power, the category and dosage of pH regulating reagent, reaction temperature and reaction time were investigated. The formation of CdS nanorings from the self-assembly of nanoparticles was attributed to the coordination of hydrazine producing the dipole-dipole interaction among the uniform nanoparticles obtained by microwave method. The crystal phase, composition, morphology and surface property of CdS nanorings were characterized. The results showed that 100 nm-sized wurtzite CdS nanorings with positive surface charges formed by the self-assembly of 5-8 nm nanoparticles, which presented mesoporous structures with maximum pore size of 52 nm. To study the in uence of ring-like structures on the photocatalysis, the photodegradation of rhodamine B (RhB) by CdS nanorings and nanoparticles were compared. The results showed that, CdS nanorings displayed higher photodegradation e ciency, which were originated from favorable band edge potential and obviously more effective electron-hole separation producing more superoxide radical and holes as active speci es. The photodegradation path of RhB contains the process as the demethylation, the decarboxylation process, the chromophore cleavage and ring-open reactions. Finally, the available photodegradation of multiple pollutants and reusability of CdS nanorings were carried out.

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Cd(II)-based metal–organic framework-derived CdS photocatalysts for enhancement of photocatalytic activity

Cited by 15 publications

References 46 publications

Ligand-Controlled Growth of Different Morphological Bimetallic Metal–Organic Frameworks for Enhanced Charge-Storage Performance and Quasi-Solid-State Hybrid Supercapacitors

Ligand-Controlled Growth of Different Morphological Bimetallic Metal–Organic Frameworks for Enhanced Charge-Storage Performance and Quasi-Solid-State Hybrid Supercapacitors

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Hydrazine-induced synthesis of CdS nanorings for the application in photodegradation

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