Facile green synthesis of Zn(OH)F from the single source precursor KZnF3

Ahmad, Shahzad; Rawat, Pooja; Nagarajan, Rajamani

doi:10.1016/j.matlet.2014.10.037

Cited by 13 publications

(5 citation statements)

References 19 publications

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“…24−27 Zn(OH)F has a wide band gap, which makes it difficult for photocarriers to recombine and has a good promotion effect on photocatalytic efficiency. 28 Moreover, fluoride ions have high electronegativity and their radius is almost the same as that of hydroxide ions, 29 which could remarkably promote the transfer of carriers at the interface of composites. Clearly, these significant advantages aroused our interest in exploring Zn(OH)F for photocatalytic H 2 production.…”

Section: Introductionmentioning

confidence: 99%

“…Zinc-based materials, because of their high exciton binding energy and direct wide band gaps, have been widely used in photoelectrocatalysis, , solar batteries, gas sensors − and fluorescence detection. − Especially, ZnO, ZIF-8, and ZnTe have been used for H 2 evolution because of their nontoxicity, long-term stability, and superior optical properties. − As a special zinc-based material, zinc hydroxy fluoride (Zn(OH)F) has been used in selective catalysts, photoluminescence, photoelectronic devices, and other fields. − However, its special properties such as luminescence and photocatalytic performance have long been neglected. − Zn(OH)F has a wide band gap, which makes it difficult for photocarriers to recombine and has a good promotion effect on photocatalytic efficiency . Moreover, fluoride ions have high electronegativity and their radius is almost the same as that of hydroxide ions, which could remarkably promote the transfer of carriers at the interface of composites. Clearly, these significant advantages aroused our interest in exploring Zn(OH)F for photocatalytic H 2 production. , …”

Section: Introductionmentioning

confidence: 99%

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Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

Yang

Zhang

Han

et al. 2022

ACS Appl. Nano Mater.

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Photocatalytic water splitting H 2 production based on semiconductor nanoparticle heterojunctions is an attractive strategy. Various morphologies of Zn(OH)F have been widely used in photocatalytic degradation of organic matter; however, its application in photocatalytic hydrogen production has been rarely reported. Herein, two kinds of morphologies catalysts, one rodlike CdS/Zn(OH)F (CdS/ RZF) and the second flower-like heterojunction CdS nanoparticle/ Zn(OH)F (CdS NP/FZF), were prepared by the simple and mild hydrothermal method. Interestingly, CdS NP/FZF exhibited superior photocatalytic activity to CdS/RZF due to the flower-like structure of Zn(OH)F, which prevented the aggregation of CdS nanoparticles, thereby exposing more active sites. Notably, the light absorption ability of CdS nanoparticle/Ni x Zn 1−x (OH)F (CdS NP/NZF) was greatly improved, which was due to the introduction of Ni 2+ . As a result, the H 2 production rate of CdS NP/NZF (2410 μmol•g −1 •h −1 ) was increased by 2.19 times compared to that of CdS NP/FZF. This remarkable enhancement of photocatalytic H 2 -evolution activity of CdS NP/NZF was attributed to its special morphology in addition to Ni 2+ doping, which promoted the separation of photogenerated electrons and holes, as well as improved the ability of visible-light response. This work provides a family of catalysts as a promising candidate for photocatalytic hydrogen evolution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

Yang

Zhang

Han

et al. 2022

ACS Appl. Nano Mater.

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“…synthesized ZnOHF using a method without any additives in their study titled "Synthesis, characterization and photocatalytic activity of Zn(OH)F hierarchical nanofibers prepared by a simple solution-based method." Shahzad Ahmad et al [63] used a simple and environmentally friendly method to synthesize zinc hydroxide fluoride (Zn(OH)F) by hydrolyzing KZnF3, a single-source precursor, with potassium iodate at 120 ℃ in their work. The process was harmless, straightforward, and scalable.…”

Section: Other Methodsmentioning

confidence: 99%

Research progress on hydroxide fluoride-based electrode materials for supercapacitors

Xu,

Meng

2023

Energ. Stor. Conv.

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Supercapacitors have attracted much attention due to their high-power density and long cycle life, making them a potential substitute for traditional batteries. The research on hydroxide fluorides as electrode materials for supercapacitors has been increasing. Hydroxide fluorides exhibit higher specific capacitance due to the redox reactions between transition metal elements in different oxidation states. However, their high resistance limits their rate performance and cycling stability, which hinders their large-scale application. This article summarizes the main synthesis methods of hydroxide fluorides, and by controlling the reaction conditions, hydroxide fluorides with different morphologies and structures can be obtained to meet various application requirements. In addition, considering the limitations of hydroxide fluorides, this article systematically introduces the main approaches to improving their electrode performance and summarizes the electrochemical characteristics and latest research progress of hydroxide fluorides.

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“…Among the halides, fluoride ions possess almost similar ionic radius to hydroxide ions, resulting in small lattice deformation. Besides, the amphoteric behavior of hydroxyl ion can be balanced by the fluoride ion because of its high electronegativity . Therefore, the metal hydroxide fluorides have attracted more attention compared with other hydroxyl halides.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the amphoteric behavior of hydroxyl ion can be balanced by the fluoride ion because of its high electronegativity. 6 Therefore, the metal hydroxide fluorides have attracted more attention compared with other hydroxyl halides. Ling et al 7 synthesized and determined the crystal and magnetic structures of Fe(OH)F and Co(OH)F, illustrating that these crystallize with a distorted ramsdellitetype structure similar to α-AlOOH, in which Fe 2+ or Co 2+ are located in octahedral symmetry (M(O,H) 6 ).…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of Zn Ions: Controllable Synthesis of Zn_xCo_1–x(OH)F Nanostructures with Their Electrochemical and Optical Properties

et al. 2019

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Recently, the synthesis and properties of metal hydroxide fluorides have attracted more attention. In this paper, a series of bimetallic hydroxyl fluorides, Zn x Co1–x (OH)F, were grown on a functionalized carbon fiber paper via a template-/binder-free hydrothermal method, whose nanostructures can be controlled only by adjusting the addition of Zn2+. On the basis of a series of experiments, the mechanism of morphology evolution is proposed first, in which Zn2+ hydrolyzes under hydrothermal conditions to form colloidal micelles, flocculate, and adsorb with other ions. The mechanism of Zn hydrolysis has been verified in other substrates, providing a novel thinking of the design of nanostructure. What is more, the electrochemical properties of the obtained Zn x Co1–x (OH)F have been studied, illustrating that it processes redox reactions and ion adsorption/desorption simultaneously as a quasi-pseudocapacitance material. On the other hand, the optical properties have been analyzed by the UV–visible absorption spectrum, in which the absorption peaks can be observed around 494, 526, and 628 nm in the visible light region. The above properties illustrate that the obtained Zn x Co1–x (OH)F have potentials in various fields as a novel material, such as electrochemical, physical, or optical fields.

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Facile green synthesis of Zn(OH)F from the single source precursor KZnF3

Cited by 13 publications

References 19 publications

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

Research progress on hydroxide fluoride-based electrode materials for supercapacitors

Hydrolysis of Zn Ions: Controllable Synthesis of Zn_xCo_1–x(OH)F Nanostructures with Their Electrochemical and Optical Properties

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Facile green synthesis of Zn(OH)F from the single source precursor KZnF3

Cited by 13 publications

References 19 publications

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

Research progress on hydroxide fluoride-based electrode materials for supercapacitors

Hydrolysis of Zn Ions: Controllable Synthesis of ZnxCo1–x(OH)F Nanostructures with Their Electrochemical and Optical Properties

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Product

Resources

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Hydrolysis of Zn Ions: Controllable Synthesis of Zn_xCo_1–x(OH)F Nanostructures with Their Electrochemical and Optical Properties