A ferroelectric photocatalyst Ag10Si4O13 with visible-light photooxidation properties

Al‐Keisy, Amar; Ren, Long; Cui, Dandan; Xu, Zhifeng; Xu, Xun; Su, Xiaoyan; Hao, Weichang; Dou, Shi Xue; Du, Yi

doi:10.1039/c6ta03578g

Cited by 48 publications

(32 citation statements)

References 37 publications

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“…The close interface between the AgSiO and Ag 2 CO 3 nanoparticles reveals the formation of nano-heterojunction 26 . From the figure, we can see that Ag 2 CO 3 is uniformly packaged by an amorphous AgSiO, limiting the growth of Ag 2 CO 3 27 . Figure S2(B) shows the lattice spacing of uniformly dispersed Ag 2 CO 3 nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

In-situ synthesis of amorphous silver silicate/carbonate composites for selective visible-light photocatalytic decomposition

Cao

Yang

Deng

et al. 2017

Sci Rep

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Coupling two different semiconductors to form composite photocatalysts is an extremely significant technique for environmental remediation. Here, a one-step in-situ precipitation method has been developed to prepare amorphous silver silicate/carbonate (AgSiO/Ag2CO3) nanoparticles (NPs) composites, which are well dispersed sphere-like particles with the sizes of around ~50–100 nm. The high-efficiency photocatalytic activities under visible light (VL) have been carefully evaluated, and the AgSiO/Ag2CO3 NPs composites exhibit selective photocatalytic degradations on Methylene Blue (MB) and Rhodamine B (RhB). The maximum degradation rate for MB can reach ~99.1% within ~40 min under VL irradiation, much higher than that of RhB (~12%) in the same condition, which can be ascribed to (I) the smaller molecule size of MB than that of RhB, (II) the fast charge separation between AgSiO NPs and Ag2CO3 NPs, abundant heterojunction interfaces as well as fully exposed reactive sites. These composites are proposed to be an example for the preparation of other silicate composite photocatalysts for practical applications in environmental remediation.

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Section: Resultsmentioning

confidence: 99%

In-situ synthesis of amorphous silver silicate/carbonate composites for selective visible-light photocatalytic decomposition

Cao

Yang

Deng

et al. 2017

Sci Rep

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“…From the inset of Figure , the absorption edge of the Cu@CuI mesh was around 522 nm. The related band gap (E g ) of the Cu@CuI mesh was calculated to be 2.49 eV based on the following equation

{(α h ν)}^{1 / 2} = A false(h normalν - E_{g} false)

where α is the absorption coefficient, ν is the incident light frequency, and A is a constant. The intense UV light adsorption of the Cu@CuI mesh provides the possibility of its usage as a photocatalyst for water purification.…”

Section: Resultsmentioning

confidence: 99%

Rapid mass production of novel 3D Cu@CuI core‐shell mesh as highly flexible and efficient photocatalyst

Zhang

et al. 2018

J Am Ceram Soc

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We report a relatively simple and economical approach for mass production of Cu@CuI mesh. This novel core‐shell structure is CuI‐coated Cu mesh, fabricated by one‐step in situ iodination of commercial copper mesh at an ambient temperature. Such a Cu@CuI mesh is low‐cost and can be successfully used for the degradation of soluble organic pollutants in water under UV light. The novel 3D Cu@CuI core‐shell structure allows for high electron/hole separation and thus leads to high catalytic efficiency. Rhodamine B (RhB) is fully degraded in even just 6 minutes using a Cu@CuI mesh as the photocatalyst. Unlike the currently reported photocatalysts mostly in the form of powders, nanoparticles, and/or nanowires, the 3D Cu@CuI mesh is freestanding and flexible, and therefore is easily separated from water after photocatalysis without causing secondary pollution. This is a significant advance toward tackling the expansive separation issue of the conventional catalysts, because the ultra‐simple separation process of 3D Cu@CuI mesh can facilitate its industry application. With a fantastic combination of low cost, facile and green fabrication, high catalytic efficiency and easy separation 3D architecture, the Cu@CuI mesh may serve as a promising candidate for water purification.

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“…These have the general formula: A’[A (n‐1) B n X (3n+1) ] and A’ 2 [A (n–1) B n X (3n+1) ] respectively, where A’=Rb, Ag; A=Ca, Sr, La; B=Nb, Ti; and X=O. The A’ in these structures is the interlayer cation that can be exchanged ,. These layered compounds offer a degree of flexibility in tuning the layer thickness and the interlayer cations and therefore the electronic band structures for PEC and PC applications.…”

Section: Structural Aspectsmentioning

confidence: 99%

Silver Oxide‐Based Semiconductors for Solar Fuels Production and Environmental Remediation: a Solid‐State Chemistry Approach

et al. 2018

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A solid‐state perspective is offered for a discussion of silver‐based ternary and quaternary oxide semiconductors for applications related to solar fuels photogeneration and environmental remediation. The rather unique d10 electron configuration in these compounds is shown to impart interesting effects on their optoelectronic properties, and in turn, the photocatalytic activity of these compounds. This Minireview focuses on the structural aspects, electronic band structures, synthetic advances, and finally photoelectrochemical and photocatalytic applications of 32 compounds within the two oxide families, of the generic formula: AgxByOz or AgxByCnOz, where B and C are metals or non‐metals other than silver.

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A ferroelectric photocatalyst Ag₁₀Si₄O₁₃ with visible-light photooxidation properties

Abstract: A new ferroelectric p-block photocatalyst, Ag10Si4O13, has been successfully prepared here and exhibited excellent visible-light-driven photocatalytic activity towards the degradation of organic compounds.

Cited by 48 publications

References 37 publications

In-situ synthesis of amorphous silver silicate/carbonate composites for selective visible-light photocatalytic decomposition

In-situ synthesis of amorphous silver silicate/carbonate composites for selective visible-light photocatalytic decomposition

Rapid mass production of novel 3D Cu@CuI core‐shell mesh as highly flexible and efficient photocatalyst

Silver Oxide‐Based Semiconductors for Solar Fuels Production and Environmental Remediation: a Solid‐State Chemistry Approach

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