Highly sensitive detection of 4-NP in real water with long stability and high anti-inteference ability based on GO–Ag2CrO4/GCE

Chen, Pinghua; Shi, Yangming; Niu, Pingping; Wang, Tao; Jiang, Hualin; Zhou, Weiqiang; Shu, Hongying; Chen, Jiezeng; Tian, Enzhu

doi:10.1016/j.jtice.2018.12.023

Cited by 16 publications

(9 citation statements)

References 32 publications

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“…The reason may be that there are other factors influencing the adsorption course. This phenomenon was also observed for other adsorbents . Furthermore, these data indicate that the adsorbent has a wide applicable pH range of 2–10.…”

Section: Resultssupporting

confidence: 77%

“…Unfortunately, the F − adsorption capacity of most of them is not satisfactory . It is well known that size and shape are important for nanomaterial properties; however, morphology control has not been paid enough attention in most of these tri‐metal adsorbents, because most previously reported tri‐metal F − adsorbents were amorphous . Therefore regular control of their morphology may be one effective way to improve their adsorption performance .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of La₂(C₂O₄)₃ nanoprisms decorated with Fe₃O₄@m(ZrO₂‐CeO₂) nanospheres and their application for effective fluoride removal

Wang

Chen

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Composites of defluoridation adsorbents based on rare earths have attracted increasing interest recently, but most of them were amorphous. The main reason for this situation is that morphology control has not been paid enough attention, because the related preparation methods are relatively sparse. Consequently, novel preparation methods are urgently needed. RESULTS:In this study, a novel La-Zr-Ce tri-metal adsorbent with regular morphology was facilely synthesized. There were two morphological shapes in the composite. Nanoprisms of La 2 (C 2 O 4 ) 3 were decorated with mesoporous nanospheres of Fe 3 O 4 @m(ZrO 2 -CeO 2 ). The samples were investigated by energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and X-ray photoelectron spectroscopy (XPS). Several affecting factors such as initial fluoride concentration, contact time, coexisting anions and pH were studied in detail. The balance data were analyzed by Langmuir, Freundlich and Langmuir-Freundlich isotherm models. The nanocomposite had a maximum sorption capacity of 117.3 mg g −1 toward fluoride, which is among the highest ever reported for fluoride adsorbents. Furthermore, it had a wide applicable pH range of 2-10 and high anti-interference ability. The different functions of La 2 (C 2 O 4 ) 3 nanoprisms and Fe 3 O 4 @m(ZrO 2 -CeO 2 ) nanospheres in the composite have been elucidated. These two components were found to synergistically improve F − adsorption performance via their individual merits. CONCLUSION: The adsorbent had high potential to treat F − contaminants in real application, and the method reported here is considered to be helpful for developing more highly effective adsorbents. Adsorption isothermsAdsorption isotherms of the adsorbents were investigated by Langmuir (Equ. S2 in File S1), Freundlich (Equ. S3 in File S1) and J Chem Technol Biotechnol 2019; 94: 3650-3660 /jctb CONCLUSIONS A novel La-Zr-Ce tri-metal adsorbent with regular morphology was successfully synthesized by step-by-step precipitation methods and showed excellent fluoride removal performance. There J Chem Technol Biotechnol 2019; 94: 3650-3660

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Section: Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Synthesis of La₂(C₂O₄)₃ nanoprisms decorated with Fe₃O₄@m(ZrO₂‐CeO₂) nanospheres and their application for effective fluoride removal

Wang

Chen

et al. 2019

J of Chemical Tech & Biotech

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“…AgInS 2 /rGO/GCE can detect 4‐NP in a wide concentration range from 1.43 to 2696.14 μmol L −1 with a low limit of detection (LOD) of 78.2 nmol L −1 (based on a signal/noise (S/N) ratio of 3), which is significantly lower than the value of 60 ppb ( ca 430 nmol L −1 ) permitted by the US Environmental Protection Agency (EPA) . The 4‐NP detection performance (linear range and detection limit) of AgInS 2 /rGO/GCE was compared with that of other previously reported 4‐NP sensors (Table ).…”

Section: Resultsmentioning

confidence: 93%

Multifunctional electrochemical application of a novel 3D AgInS₂/rGO nanohybrid for electrochemical detection and HER

Shi

Chen

Bai

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Environmental pollution and energy depletion are two serious problems that face mankind at present, so it is urgent to develop effective methods to deal with them. Electrochemistry offers a promising solution method owing to its fast, sensitive and clean properties. Since electrode materials are significantly important to improve electrochemical performance, studies of effective electrode materials have attracted increasing interest and become a research hotspot in recent years. RESULTS:In this study, a novel multitasking electrode material 3D AgInS 2 /rGO was successfully prepared, the first to couple two important electrochemical functions of sensing and hydrogen evolution reaction (HER) into one electrode material. It can highly sensitively detect 4-nitrophenol in real water over a wide concentration range with significantly low limit of detection, outstanding stability and anti-interference ability. Furthermore, it can effectively electrolyze water to produce H 2 by HER with low onset potential, low overpotential, small Tafel slope, good durability and high stability.CONCLUSION: The study indicates that the highly conductive 3D rGO scaffold decorated with nano AgInS 2 particles forms a nanohybrid, which produces positive synergistic effects to improve the electrochemical properties. This 3D AgInS 2 /rGO nanocomposite is considered to have high potential to deal with environmental problems owing to its high performance in the two important functions of contaminant sensing and HER. Preparation of AgInS 2 /rGO/GCEThe GCE (3 mm diameter) was polished with 0.3 μm Al 2 O 3 powder and then sonicated in mixtures of nitric acid/water (1:1, v:v) and ethanol/water (1:1, v:v) for 5 min respectively. After that, the electrode was dried in air. As-prepared AgInS 2 /rGO was dispersed in water to get a 1 mg mL −1 dispersion; 12 μL of this AgInS 2 /rGO dispersion was dropped on the surface of the pre-cleaned GCE and then dried to obtain the AgInS 2 /rGO-modified GCE (denoted as AgInS 2 /rGO/GCE). Preparation of AgInS 2 /rGO/NFIn the HER experiment, nickel foam (NF) (1 cm × 2 cm) was sequentially sonicated in hydrochloric acid, ethanol and deionized water wileyonlinelibrary.com/jctb

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“…Peak at 529.64 eV corresponds to the lattice oxygen of both Ti–O and Cr–O and the characteristic peak at 532.94 eV can be assigned to the related oxygen in r-GO (Figure e) . C 1s spectra is exhibiting three distinct peaks at the binding energy of 284.81, 286.34 ,and 288.04 eV which are attributed to sp 2 carbon (CC), epoxy/hydroxyl (C–O), and carboxyl (O–CO) group of reduced graphene oxide (Figure f) …”

Section: Resultsmentioning

confidence: 97%

Novel Green Approach for Fabrication of Ag₂CrO₄/TiO₂/Au/r-GO Hybrid Biofilm for Visible Light-Driven Photocatalytic Performance

et al. 2020

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Development of cutting edge materials using a benevolent ecologically cordial methodology is an ideal approach for heterogeneous visible light photocatalysis. A new biogenic photocatalyst was developed by coupling titanium dioxide (TiO 2 ) decorated elongated rhombic shape silver chromate (Ag 2 CrO 4 ) with gold (Au) and reduced graphene oxide (r-GO) for dye degradation applications under visible light. An ecologically positive methodology was utilized to develop the quaternary Ag 2 CrO 4 /TiO 2 /Au/r-GO nanostructures biofilm with gold and reduced graphene oxide (r-GO) via impregnation and in situ reduction technique in the presence of acacia gum. The structural properties and morphology of the Ag 2 CrO 4 /TiO 2 /Au/r-GO nanostructures were described by several spectroscopic and microscopic methods such as XRD, XPS, ATR-FTIR, Raman spectroscopy, FE-SEM, etc. Alteration with Au and r-GO decreased the band vitality and essentially improved the visible light ingestion of the quaternary Ag 2 CrO 4 /TiO 2 /Au/r-GO composite biofilm photocatalyst and slowed down the recombination process of the photogenerated electrons and holes. To demonstrate how such a unique heterostructured biofilm might produce more outstanding photocatalytic activity, we examined a comparison of the photocatalytic performances of Ag 2 CrO 4 /TiO 2 /Au/r-GO hybrid biofilm with different inner structures. The photocatalytic debasement of MB reached almost 97% within 52 min, and it has been found that the Ag 2 CrO 4 /TiO 2 /Au/r-GO biofilm increased the degradation rate of MB by a factor of 10.8, 6.5, and 3.1 in comparison with exposed Ag 2 CrO 4 , Ag 2 CrO 4 /TiO 2 , and Ag 2 CrO 4 / TiO 2 /Au biofilms, individually. Further, the high electron movement capacity of Ag 2 CrO 4 /TiO 2 /Au/r-GO biofilm was explored by photoelectrochemical investigation and TCSPC to comprehend the mechanistic insight of the superior activity of this composite nanostructures under visible light illumination. Hence, the present investigation describes a facile, eco-friendly, and biomimetic approach for the fabrication of Ag 2 CrO 4 /TiO 2 /Au/r-GO biofilm based photocatalyst using acacia gum.

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Highly sensitive detection of 4-NP in real water with long stability and high anti-inteference ability based on GO–Ag2CrO4/GCE

Cited by 16 publications

References 32 publications

Synthesis of La₂(C₂O₄)₃ nanoprisms decorated with Fe₃O₄@m(ZrO₂‐CeO₂) nanospheres and their application for effective fluoride removal

Synthesis of La₂(C₂O₄)₃ nanoprisms decorated with Fe₃O₄@m(ZrO₂‐CeO₂) nanospheres and their application for effective fluoride removal

Multifunctional electrochemical application of a novel 3D AgInS₂/rGO nanohybrid for electrochemical detection and HER

Novel Green Approach for Fabrication of Ag₂CrO₄/TiO₂/Au/r-GO Hybrid Biofilm for Visible Light-Driven Photocatalytic Performance

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Highly sensitive detection of 4-NP in real water with long stability and high anti-inteference ability based on GO–Ag2CrO4/GCE

Cited by 16 publications

References 32 publications

Synthesis of La2(C2O4)3 nanoprisms decorated with Fe3O4@m(ZrO2‐CeO2) nanospheres and their application for effective fluoride removal

Synthesis of La2(C2O4)3 nanoprisms decorated with Fe3O4@m(ZrO2‐CeO2) nanospheres and their application for effective fluoride removal

Multifunctional electrochemical application of a novel 3D AgInS2/rGO nanohybrid for electrochemical detection and HER

Novel Green Approach for Fabrication of Ag2CrO4/TiO2/Au/r-GO Hybrid Biofilm for Visible Light-Driven Photocatalytic Performance

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Synthesis of La₂(C₂O₄)₃ nanoprisms decorated with Fe₃O₄@m(ZrO₂‐CeO₂) nanospheres and their application for effective fluoride removal

Synthesis of La₂(C₂O₄)₃ nanoprisms decorated with Fe₃O₄@m(ZrO₂‐CeO₂) nanospheres and their application for effective fluoride removal

Multifunctional electrochemical application of a novel 3D AgInS₂/rGO nanohybrid for electrochemical detection and HER

Novel Green Approach for Fabrication of Ag₂CrO₄/TiO₂/Au/r-GO Hybrid Biofilm for Visible Light-Driven Photocatalytic Performance