The dehydration of phosphates monitored by DSC/TGA and in situ Raman spectroscopy

Jager, Henk-Jan de; Prinsloo, Linda C.

doi:10.1016/s0040-6031(01)00582-2

Cited by 57 publications

(38 citation statements)

References 12 publications

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“…It accounts for only a 0.29 % weight loss and, although there is not any evident simultaneous endotherm, a change of slope can be observed on the DSC curve indicating a potential hidden endotherm. It was reported that monobasic sodium phosphate produces three weight losses at 122, 210 and 343 ºC [25]. The last one, corresponding to the pyrophosphatemetaphosphate transformation, can be attributed to the 352.5 ºC LC.…”

Section: Resultsmentioning

confidence: 98%

Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicas

Corpas-Iglesias¹,

Pérez‐Villarejo²,

Guerrero³

et al. 2011

Bol. Soc. Esp. Ceram. Vidr.

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Ceramic processing is one of the most efficient and environmentally friendly solutions to the enormous amounts of industrial mud produced in metal surface treatments. Moreover, ceramized products may represent an important secondary source to replace clay materials and cut down manufacturing costs. After characterization, in order to prepare specimens by uniaxial die pressing, mud was incorporated into a clay matrix at rates between 1 and 5 wt %. Compression strength, linear contraction, suction capacity and water absorption of the moulded materials were evaluated. Finally, metal leakage was characterized through chemical analysis of lixiviates. The results showed an improvement in mechanical properties following the incorporation of mud into the ceramic materials. The resulting materials meet health and safety regulations regarding dangerous waste recycling.Keywords: Valorization, Mud, Ceramic, Waste. Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicasLa ceramización es una de las soluciones más eficientes y medioambientalmente más ecológicas para las enormes cantidades de lodos industriales que se producen en el tratamiento de superficies metálicas. Además estos lodos convenientemente ceramizados pueden representar una fuente de materia prima que sustituya en parte el consumo de arcilla, lo que se traduce en una disminución de los costes de fabricación. Tras caracterizarse, los lodos fueron incorporados en la matriz cerámica en proporciones desde el 1% hasta el 5%, fabricándose así piezas cerámicas por compresión uniaxial en seco. A las piezas conformadas se les midieron una serie de características tecnológicas tales como la resistencia a la compresión, la contracción lineal, capacidad de succión y la absorción de agua. Finalmente se realizaron análisis químicos de lixiviados para evaluar la liberación al medio de metales. Los resultados conseguidos muestran una mejora de las propiedades mecánicas tras la inclusión de los lodos en matrices cerámicas. Los materiales así fabricados satisfacen la normativa referente al reciclaje de residuos peligrosos.

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Section: Resultsmentioning

confidence: 98%

Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicas

Corpas-Iglesias¹,

Pérez‐Villarejo²,

Guerrero³

et al. 2011

Bol. Soc. Esp. Ceram. Vidr.

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“…Beside the weight loss caused by the removal of physically and chemically absorbed water of the uncalcined sample C, the weight loss caused by the transformation of the material composition form M(H 2 PO 4 ) 2 into M 2 P 2 O 7 and MH 2 P 2 O 7 (M=Ni, Co) in the sample C precursor could be found when the temperature up to 400 °C. When the temperature reached 500 °C, the composition of the precursor was further decomposed . No additional weight loss occurred up to 600 °C.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Micro/Nano‐Flower Ni_XCo−P−O for High‐Performance Electrochemical Supercapacitors

Yang

Wang

et al. 2019

ChemElectroChem

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Micro/nanomaterials consisting of Ni Χ CoÀ PÀ O were synthesized via a facile, one-pot solvothermal method and then used as positive electrode materials in asymmetric supercapacitors. The obtained Ni x CoÀ PÀ O (sample C) electrode materials displayed a typical micro/nano-flower morphology. A large capacitance of 956 F g À 1 could be delivered when Ni x CoÀ PÀ O (sample C) composites were used as electrodes in supercapacitors. Furthermore, a high cell voltage (1.8 V), which allowed a high energy density of 47.68 Wh kg À 1 at a power density of 884.78 W kg À 1 , was obtained using micro/nano-flowers Ni x CoÀ PÀ O (sample C)//activated carbon (AC) in an asymmetric capacitor (ASC). The high electrochemical performance and typical micro/nano-flower morphology make the Ni x CoÀ PÀ O composites (sample C) promising electrode materials for supercapacitors.[a] J.

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“…ACCEPTED MANUSCRIPT 11 The Raman and FT-IR bands indicated the formation of non-bridging oxygen in the Ti-O bond due to the incorporation of phosphorus in the oxide layer [53,54]. The absence of the features of PO 4 3-group in the vibrational spectroscopy measurements confirms that strongly acidic conditions promote the incorporation of P into the oxide, instead of the deposition of phosphate crystals.…”

Section: Accepted Manuscriptmentioning

confidence: 92%

“…Raman spectra (Fig. 5A) to the incorporation of P 5+ ions [53][54][55] into the oxide coating, promoted by the strongly acidic conditions. The band at ~ 1100 cm -1 cannot be assigned to the vibrational  3 mode of the phosphate group, and can be attributed as well to P-O-P bondings, due to P 5+ ions incorporated into the oxide nanolayer; the intensity of the former is higher for the anodized surface obtained in 1M H 3 PO 4 (Fig.…”

Section: Structural Characterization Of the Anodized Layermentioning

confidence: 99%

Obtaining, structural and corrosion characterization of anodized nanolayers on Ti-20Zr alloy surface

Moreno

Osiceanu

Vasilescu

et al. 2013

Surface and Coatings Technology

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The dehydration of phosphates monitored by DSC/TGA and in situ Raman spectroscopy

Cited by 57 publications

References 12 publications

Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicas

Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicas

Synthesis of Micro/Nano‐Flower Ni_XCo−P−O for High‐Performance Electrochemical Supercapacitors

Obtaining, structural and corrosion characterization of anodized nanolayers on Ti-20Zr alloy surface

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The dehydration of phosphates monitored by DSC/TGA and in situ Raman spectroscopy

Cited by 57 publications

References 12 publications

Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicas

Lodos procedentes de la industria de tratamiento de superficies metálicas como aditivos a matrices cerámicas

Synthesis of Micro/Nano‐Flower NiXCo−P−O for High‐Performance Electrochemical Supercapacitors

Obtaining, structural and corrosion characterization of anodized nanolayers on Ti-20Zr alloy surface

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Synthesis of Micro/Nano‐Flower Ni_XCo−P−O for High‐Performance Electrochemical Supercapacitors