Shape-controlled synthesis of well-dispersed platinum nanocubes supported on graphitic carbon nitride as advanced visible-light-driven catalyst for efficient photoreduction of hexavalent chromium

Wu, Jianhua; Shao, Fang-Qi; Han, Shiyi; Bai, Song; Feng, Jiu‐Ju; Li, Zhengquan; Wang, Ai‐Jun

doi:10.1016/j.jcis.2018.09.080

Cited by 42 publications

(13 citation statements)

References 57 publications

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“…Nanotechnology can be defined as a branch of science that deals with particles that fall in the size range of 1–100 nm 8. Nanotechnology and the study of nanosized objects require knowledge on diverse fields of science such as surface chemistry,9 molecular engineering, semiconductor physics, biology, and photoreduction of heavy metals10–14 etc. and are a convergence of such different traditional sciences 15.…”

Section: Introductionmentioning

confidence: 99%

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Samrot¹,

Sahithya²,

A³

et al. 2019

IJN

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BackgroundSuper-paramagnetic iron oxide nanoparticles (SPIONs) are widely used metal nanoparticles for various applications for its magnetic property and biocompatibility. In recent years, pollution of our environment especially with heavy metals in waterbodies has become a major threat and has left us very minimal sources of freshwater to drink. SPIONs or surface modified SPIONs can be used to remove these heavy metalsMethodsSPIONs were synthesized by co-precipitation method and further coated with a biopolymer, chitosan. Chromium solution was treated with the synthesized SPIONs to study the efficiency of chromium removal by surface adsorption. Later, the adsorption was analysed by direct and indirect analysis methods using UV-VIS spectrophotometry and isotherm studies.ResultsStable chitosan-coated SPIONs were synthesized and they adsorbed chromium better than the uncoated SPIONs, where it was adsorbing up to 100 ppm. Adsorption was found to be increasing with decrease in pH.ConclusionThe surface-modified SPIONs expressed cumulative adsorption action. Even after the adsorption studies, chitosan-coated SPIONs were possessing magnetic property. Thus, the surface-modified SPIONs can become an ideal nanotechnology tool to remove the chromium from groundwater.

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Section: Introductionmentioning

confidence: 99%

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Samrot¹,

Sahithya²,

A³

et al. 2019

IJN

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“…triazine assisted microporous covalent organic polymer enfolded alginate biocomposite beads) [27]. Furthermore, the combination of adsorption with photocatalytic [28][29][30][31][32][33] or electrochemical [4,[34][35][36] reduction has been also explored. Despite the unique performances in Cr(VI) removal by these materials, extensive efforts are also required to develop eco-friendly, effective and reusable materials.…”

Section: Introductionmentioning

confidence: 99%

Combination of interfacial reduction of hexavalent chromium and trivalent chromium immobilization on tin-functionalized hydroxyapatite materials

Campisi

Evangelisti

Postole

et al. 2021

Applied Surface Science

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We present an ecofriendly hydroxyapatite (HAP) material functionalized with tin (Sn/HAP) for an efficient interfacial reduction of Cr(VI) to Cr(III).Tin was deposited on HAP at different concentrations (from 0.2 to 1.2 mmol/g) using colloidal or clear acid solutions of SnCl 2 . The morphological and structural properties of fresh and used Sn/HAP samples were determined (N 2 adsorption-desorption, transmission electron microscopy techniques, XRPD, XPS). Tests were performed under various conditions: at different pH 3-7, inert or oxidant atmosphere, sample aging (up to 15 days).Sn/HAP samples prepared using colloidal acid solutions revealed the best performances in the reduction of Cr (VI) to Cr(III), carried out under mild conditions (40 • C in acidified solution) with initial concentration of Cr(VI) in the range from 25 to 50 ppm. Best removal of Cr(VI) (10 mg/g) was obtained by using a Sn-concentration of 0.65 mmol/g with complete adsorption of the formed Cr(III) at HAP surface. This finding was associated with higher Sn-dispersion (surface Sn, 9.4 at.%) compared to samples prepared from clear solutions (surface, Sn 7.7 at. %), as evidenced by HAADF-STEM/EDX and XPS analyses. Remarkably, tin was tightly retained on the HAP surface under reaction conditions (0.7% leaching), confirming the occurrence of Cr(VI) reduction at solid-liquid interphase.

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“…According to World Health Organization (WHO), hexavalent chromium Cr(VI) is the most hazardous pollutant, hence there is a need to develop practical and cost-effective methodologies for reductive transformation of Cr(VI) to Cr(III). The Pd-based catalyst has high efficiency for the reduction of Cr(VI). ,− ,, …”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Pd-Based Ternary Pd@CdS@TiO₂ Nanoclusters via a Solvothermal Route and Their Catalytic Reduction Efficiency toward Toxic Hexavalent Chromium

2018

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In this work, we report the synthesis of Pd-based ternary Pd@CdS@TiO 2 nanocomposites using molecular precursors. This method is facile, less time-consuming, and cost-effective. This catalyst is prepared within 2 h by a solvothermal route using molecular precursors. Information about the phase, morphologies, elemental mapping, and composition of the nanocomposites was obtained using various characterization techniques. The catalytic activity of the as-prepared Pd-based ternary Pd@CdS@TiO 2 nanocomposites exhibits effective reduction efficiency for the conversion of toxic Cr(VI) to Cr(III) using formic acid as a reducing agent within 5–7 min. To the best of our knowledge, this is the first report on Pd-based ternary Pd@CdS@TiO 2 nanocomposites prepared by a solvothermal route and used as catalysts toward the reduction of hexavalent chromium at room temperature.

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Shape-controlled synthesis of well-dispersed platinum nanocubes supported on graphitic carbon nitride as advanced visible-light-driven catalyst for efficient photoreduction of hexavalent chromium

Cited by 42 publications

References 57 publications

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Combination of interfacial reduction of hexavalent chromium and trivalent chromium immobilization on tin-functionalized hydroxyapatite materials

One-Pot Synthesis of Pd-Based Ternary Pd@CdS@TiO₂ Nanoclusters via a Solvothermal Route and Their Catalytic Reduction Efficiency toward Toxic Hexavalent Chromium

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Shape-controlled synthesis of well-dispersed platinum nanocubes supported on graphitic carbon nitride as advanced visible-light-driven catalyst for efficient photoreduction of hexavalent chromium

Cited by 42 publications

References 57 publications

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Combination of interfacial reduction of hexavalent chromium and trivalent chromium immobilization on tin-functionalized hydroxyapatite materials

One-Pot Synthesis of Pd-Based Ternary Pd@CdS@TiO2 Nanoclusters via a Solvothermal Route and Their Catalytic Reduction Efficiency toward Toxic Hexavalent Chromium

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One-Pot Synthesis of Pd-Based Ternary Pd@CdS@TiO₂ Nanoclusters via a Solvothermal Route and Their Catalytic Reduction Efficiency toward Toxic Hexavalent Chromium