Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer

Cursino, Ana Cristina Trindade; Rives, V.; Arízaga, Gregório Guadalupe Carbajal; Trujillano, Raquel

doi:10.1016/j.materresbull.2015.04.055

Cited by 28 publications

(15 citation statements)

References 30 publications

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“…This wide band (inset of Figure 15) could be a contribution from O-H groups in both the organic matter and the photocatalyst. In the literature, the shoulder detected at 3541 cm −1 has been associated to hydroxyl groups, bonded to lanthanides and transition metal oxide cations [45]. Therefore, this signal can be assigned to OH − generated on the surface of the DyCoO 3 photocatalyst.…”

Section: Photocatalytic Decomposition Of Malachitementioning

confidence: 92%

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

et al. 2019

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Oxides with the perovskite type structure of formula LnCoO 3 , where Ln is a rare earth element, have unique physical and chemical properties. These materials are applied in catalysis, gas sensors, and electrodes for solid oxide fuel cells, among others. In this work, single-phase DyCoO 3 was obtained at 900 ∘ C using the solution-polymerization method. The microstructure of this material corresponds to a dendritic-type shape, with grain size between 0.2 and 8 m and abundant porosity. The ultraviolet (UV) sensing characterization was performed on sintered pellets made with the as-prepared DyCoO 3 powder. The UV source was a light emitting diode (LED) of wavelength ( ) of 365 nm. The detection of this radiation, with constant optical irradiance (E e ), produced uniform and reproducible response patterns. When E e was increased, the graphs revealed a quantitative detection of the light. Analogous results were obtained using light of larger wavelengths: = 400, 449, and 642 nm. The graphs display a decrease on the variation of the photocurrent by increasing , corresponding to a decrease on the energy of the incoming photons. On the other hand, the photocatalytic decomposition of malachite green under UV radiation was investigated using powder of DyCoO 3 . The results show a decrease of the absorbance by increasing the UV exposure time, indicating the degradation of the dye. Since DyCoO 3 is a p-type semiconductor material, the generation of electrical charge carriers under UV radiation explains its photocurrent and photocatalytic properties. In general, these properties can be applied in UV sensors to prevent skin cancer, photoconductive materials for solar photocells, and photocatalysis to decompose organic dyes.

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Section: Photocatalytic Decomposition Of Malachitementioning

confidence: 92%

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

et al. 2019

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“…For instance, stabilizing [28] or activating [29,30] anions are introduced to the LDH structure. LDH are promising materials to be used as nanocontainers for special anions, such as drugs [31,32], inhibitors [24], anionic dyes [33], sensor anions [34], etc.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“Smart” anticorrosion pigment based on layered double hydroxide: construction and characterization

Кovalenko

Kotok

2019

EEJET

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Лакофарбовi покриття широко використовуються в свiтi як для надання декоративних властивостей, так i для захисту металевих виробiв вiд корозiї. Однак звичайнi лакофарбовi покриття мають тiльки пасивним типом захисту металу. Для створення активного типу протикорозiйного захисту у лакофарбовi покриття вводять окремi антикорозiйнi добавки. В результатi аналiзу даних в якостi бi-функцiонального (одночасно кольорового i протикорозiйного) пiгмента теоретично був сконструйований монофазний Zn-Al-триполiфосфатний ПШГ загальної формули Zn 0.8 Al 0.2 (P 3 O 10 ) 0.04 . В даному СДГ Zn 2+ я катiон-«хазяїн» i Al 3+ як катiон-«гiсть» вiдповiдають за бiлий колiр пiгменту, а iнтеркальвоний триполiфосфат-анiон -iнгiбитор корозiї. В якостi методу отримання був обраний безперервний синтез при рiвноважному рН при температурi 70 °С. Даним методом отримано зразок сконструйованого теоретично пiгменту. Кристалiчна структура зразку вивчена методом рентгенофазового аналiзу, морфологiя i розмiр часток методом скануючої електронної мiкроскопiї, термiчнi властивостi методом термогравiметрiї. Характеристики кольору були отриманi за допомогою компаратору кольору, протикорозiйнi властивостi вивченi електрохiмiчно методом зняття анодних поляризацiйних кривих сталi 08Кп в 5 % (масс.) розчинi Na 2 SO 4 з екстрактом пiгменту та без екстракту. Методом рентгенофазового аналiзу встановлено формування бi-фазного продукту, що складається iз сконструйованого ПШГ (iз структурою Zn(OH) 2 ) та Zn-Al ПШО (iз структурою ZnO). Це вказує на частковий розпад ПШГ в момент отримання, причина розпаду не виявлена. Методом СЕМ показано формування однакових часток, якi є агломератами бiльш мiлких часток, та мають високорозвинену поверхню. Вивчення характеристик кольору виявило, що отриманий пiгмент має високу ступiнь бiлого (коефiцiент дифузного вiдбиття бiльше 90 %, чистота кольору менше 1 %, свiтлота бiльше 96 %). Це обумовлено кольором як ПШГ-фази, так i ПШО-фази. Методом зняття анодних поляризацiйних кривих показано зниження швидкостi корозiї сталi в присутностi водного екстракту пiгмента в 5,36 рази (густина струму корозiї знижується з 5.63 мА/см 2 до 1.03 мА/см 2 ). Все це чiтко доводить, что синтезовано бi-функцiональний «розумний» пiгмент, що має високi пiгментнi властивостi, високу ступiнь бiлого та високi корозiйно-захиснi властивостiКлючовi слова: лакофарбовi покриття, Zn-Al ПШГ, «розумний» бi-функцiональний пiгмент, триполiфосфат, iнгiбiтор UDC 54.057:544.653:621.13:661.13

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“…A general formula for divalent metal-based LDH is ( ) [30] or activating [12,31] anions can be introduced into the LDH structure. A promising application for LDH is as nano-containers for special anions, such as drugs [32,33], dyes [29], sensors [34], corrosion inhibitors [35], etc. In practical terms, LDH are ionic constructors with three main components [24]: "host" metal cation, "guest" metal cation, and intercalated anion.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Bifuctional indigocarminintercalated NiAl layered double hydroxide: investigation of characteristics for pigment and supercapacitor application

Кovalenko

Kotok

2020

EEJET

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Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer

Cited by 28 publications

References 30 publications

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

“Smart” anticorrosion pigment based on layered double hydroxide: construction and characterization

Bifuctional indigocarminintercalated NiAl layered double hydroxide: investigation of characteristics for pigment and supercapacitor application

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Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer

Cited by 28 publications

References 30 publications

Novel UV Sensing and Photocatalytic Properties of DyCoO3

Novel UV Sensing and Photocatalytic Properties of DyCoO3

“Smart” anti­corrosion pigment based on layered double hydroxide: construction and characterization

Bifuctional indigocarmin­intercalated Ni­Al layered double hydroxide: investigation of characteristics for pigment and supercapacitor application

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Product

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Novel UV Sensing and Photocatalytic Properties of DyCoO₃

Novel UV Sensing and Photocatalytic Properties of DyCoO₃

“Smart” anticorrosion pigment based on layered double hydroxide: construction and characterization

Bifuctional indigocarminintercalated NiAl layered double hydroxide: investigation of characteristics for pigment and supercapacitor application