Microstructure characterization of hydrothermally synthesized PANI/V2O5·nH2O heterojunction photocatalyst for visible light induced photodegradation of organic pollutants and non-absorbing colorless molecules

Kundu, Samapti; Satpati, Biswarup; Kar, Tanusree; Pradhan, S.K.

doi:10.1016/j.jhazmat.2017.06.034

Cited by 105 publications

(36 citation statements)

References 72 publications

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“…[15,16] This basal spacing value is relative to the basal spacing of V 2 O 5 •nH 2 O nanosheet and PANI monolayer (0.56 nm for PANI monolayer), [15] which is close to the interlayer spacing of previous reported PANI-V (1.42 nm). [16] It suggests that monolayer V 2 O 5 nanosheets are alternately stack with PANI monolayer, forming the superlattice structure. High-resolution STEM image of PANI-V was tried to observe its structural details, unfortunately, but it is not to obtain more information possibly due to its sensitivity under the high voltage ( Figure S2, Supporting Information).…”

supporting

confidence: 84%

Electron Delocalization and Dissolution‐Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc‐Ion Batteries

Han

et al. 2020

Advanced Energy Materials

171

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Exploitation of clean renewable energy (solar, wind, and water) has inspired plentiful scientific researches on the development of large-scale energy storage systems (ESS), which possess cost-efficient and environmental-benign. Recently, in spite of the fact that more research achievement have been obtained in sodium-ion batteries and lithium ion batteries with organic electrolyte, some issues arising from organic electrolyte (detrimental effect on the environment, moisturesensitive, potential safety hazards induced by low flash point) have obstructed their practical application in ESS. Aqueous batteries are considered as an attractive candidate for ESS, due to its safety and a low environmental impact. Especially, aqueous zinc-ion batteries (AZIBs) stand out from the various aqueous batteries and have attracted more attention from researchers, owing to unique merits of zinc metal anode, including low redox potential (−0.76 V vs standard hydrogen electrode), chemical stability in water, and the abundant resources of zinc. [1-3] The choice of cathode candidates is crucial for AZIBs, and they can be classified into two types, conversion-type (NiO, Co 3 O 4 , etc.) [4] and intercalation-type (V 2 O 5 , MnO 2 , Prussian blue analogues, etc.), [5,6] based on their Zn-ion storage mechanism. The intercalation-type cathode is promising due to the utilization of neutral or slightly acidic electrolyte (ZnSO 4), in comparison with the conversion-type cathodes which utilize alkaline electrolyte, alleviating the dendritic zinc formation and reducing the environmental impact. V 2 O 5 , which has a layered structure, is considered as an ideal intercalation cathode candidate for Zn 2+ storage due to large capacity. However, V 2 O 5 application is hindered by its low conductivity, strong interaction with Zn 2+ and cathode dissolution, giving rise to the sluggish kinetics and capacity degradation. To solve these issues, the cathode host should have an appropriate crystal structure with large diffusion channels, weak electrostatic interaction with Zn 2+ , and high rate capability for Zn-ion storage. Yan et al. reported that electrostatic interactions with the V 2 O 5 framework can be weakened by Zn 2+ solvation in structural H 2 O in V 2 O 5 •nH 2 O. [7] Alkali metal ions (e.g., Li + , Aqueous zinc-ion batteries (ZIBs) have triggered a great deal of scientific research and become a promising alternative for large-scale energy storage applications, owing to the unique merits of high volumetric energy density, abundance of zinc resources, eco-friendliness, and safety. The pace of progress of ZIB development, however, is hindered by their poor reversibility and sluggish kinetics, derived from the dissolution of active materials in aqueous electrolytes and the strong electrostatic interactions between Zn 2+ and the cathode lattice. Herein, a vanadium oxide (V 2 O 5-x)/ polyaniline (PANI-V) superlattice structure is demonstrated as a model of superlattice structural engineering to overcome these weaknesses. In this superlattice, the PAN...

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confidence: 84%

Electron Delocalization and Dissolution‐Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc‐Ion Batteries

Han

et al. 2020

Advanced Energy Materials

171

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“…The initial V 2p 3/2 signal can be split into two peaks at 517.6 and 516.3 eV, corresponding to the V 5+ and V 4+ , respectively (Figure 5b). [ 45,46 ] However, no Zn element is found in the initial state (Figure 5c). For the preparation of the PANI intercalated V 2 O 5 in the acidic solution, the formation of protonated polyaniline is responsible for complementing the electronic conductivity via the doping process.…”

Section: Resultsmentioning

confidence: 99%

Regulation of Lamellar Structure of Vanadium Oxide via Polyaniline Intercalation for High‐Performance Aqueous Zinc‐Ion Battery

Song

Hui

et al. 2020

Adv Funct Materials

234

118

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According to the intercalation mechanism, an ordered modulation of channel structures of metal oxides is crucial to reversibly accumulate large zinc ions with high surface charge density for improving zinc-ion battery performance. However, the irreversible structure-transition commonly results in serious performance decay. Herein, polyanilines are in situ intercalated into the layered vanadium oxide in order to enlarge the lamellar spacing for enhancing the battery performance. With enlarged lattice spacing, the polyaniline intercalated vanadium oxide (PIVO) coupled with a Zn electrode exhibit a large specific capacity of 372 mAh g −1 and good cycling stability. More importantly, in situ characterization results reveal that PIVO allows the accumulation of additional zinc ions without obvious phase transformation and the conjugated polymeric chains enable the structure flexibility in the confined layer space to relieve the intercalation stress for improving cycling stability. Additionally, findings from the in situ infrared spectroscopy measurements elucidate the charge storage mechanism of the battery. Reversible doping processes of polyaniline molecules in vanadium oxide allow the involvement of multiple ions in the charge storage process, improving battery performance. Uncovering the origin of improved charge storage mechanisms is of importance in rationally designing advanced materials with unique organic-inorganic features for high-performance zinc-ion batteries.

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“…Ω −1 cm −1 com 10% de V 4+ (trata-se de um semicondutor do tipo n). 115,122128 Este material já foi utilizado em (foto)catálise, 130,131 Dentre as diimidas produzidas neste trabalho (gura 1.33) algumas já foram reportadas na literatura, como descrito a seguir:…”

Section: Diimidas Naftálicas Simétricas: Breve Revisãounclassified

“…Com os dados de difração de raios-X (guras 3.42, 3.43 e 3.44) foi possível conrmar a estrutura lamelar do xerogel de pentóxido de vanádio, ou VXG (chamamos de xerogel o sólido obtido a partir do gel após evaporação da água em temperatura ambiente) com distância interlamelar de 11,420 Å resultado similar à literatura. 113,119121,130,134,161,172175 20,21,46,52,71,82 :…”

Section: Pentóxido De Vanádio E Compósitos Vxg/diimidasunclassified

“…Estes dados sinalizam uma possível intercalação das diimidas entre as lamelas do óxido 175. Os especros de FTIR (guras 3.46, 3.47 e 3.48) destas amostras demonstram a estrutura do V 2 O 5 com bandas referentes ao estiramento simétrico do fragmento V-O-V em 509 cm −1 , o estiramento assimétrico do fragmento V-O em 762 cm −1 e o modo vibracional da ligação estreita V=O em 1010 cm −1 do tetraedro formado pelo V 2 O 5 112,116,126,130,174,175. Em todos os espectros não há variações nas bandas do óxido demonstrando que a estrutura não foi rompida.…”

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Estudo das propriedades eletrônicas e espectroscópicas de uma série de diimidas naftálicas com substituintes aromáticos com potencial aplicação em dispositivos de armazenamento e conversão de energia

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Microstructure characterization of hydrothermally synthesized PANI/V2O5·nH2O heterojunction photocatalyst for visible light induced photodegradation of organic pollutants and non-absorbing colorless molecules

Cited by 105 publications

References 72 publications

Electron Delocalization and Dissolution‐Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc‐Ion Batteries

Electron Delocalization and Dissolution‐Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc‐Ion Batteries

Regulation of Lamellar Structure of Vanadium Oxide via Polyaniline Intercalation for High‐Performance Aqueous Zinc‐Ion Battery

Estudo das propriedades eletrônicas e espectroscópicas de uma série de diimidas naftálicas com substituintes aromáticos com potencial aplicação em dispositivos de armazenamento e conversão de energia

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