Properties and reactivity of sulfidized nanoscale zero-valent iron prepared with different borohydride amounts

2021 ◽  
Author(s):  
Zhen Cao ◽  
Hao Li ◽  
Shuangyu Zhang ◽  
Yunxuan Hu ◽  
Jiang Xu ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Reduction Method ◽  
Zero Valent Iron ◽  
Zerovalent Iron ◽  
Nanoscale Zerovalent Iron ◽  
Phase Reduction ◽  
Nanoscale Zero Valent Iron

The liquid-phase reduction method with NaBH4 as the reductant is the most widely used method for sulfidized nanoscale zerovalent iron (SNZVI) synthesis. However, it is unclear how the reductant amount...

Polyethylene glycol-stabilized bimetallic nickel -zero valent iron nanoparticles for efficient removal of Cr(VI)

2021 ◽  
Author(s):  
shuang wang ◽  
Dengjie Zhong ◽  
Yunlan Xu ◽  
Nianbing Zhong
Keyword(s):  
Polyethylene Glycol ◽  
Liquid Phase ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Efficient Removal ◽  
Phase Reduction ◽  
Nanoscale Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles

In order to solve the agglomeration of nanoscale zero-valent iron (nZVI) and improve its performance of pollutant treatment, polyethylene glycol-stablized nickel modified nZVI (Ni/Fe-PEG) was synthesized by liquid -phase reduction...

scholarly journals New insights into the activity of a biochar supported nanoscale zerovalent iron composite and nanoscale zero valent iron under anaerobic or aerobic conditions

RSC Advances ◽  
2017 ◽  
Vol 7 (15) ◽  
pp. 8755-8761 ◽  
Author(s):  
Xiangqi Peng ◽  
Xiaocheng Liu ◽  
Yaoyu Zhou ◽  
Bo Peng ◽  
Lin Tang ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Zerovalent Iron ◽  
Batch Experiments ◽  
Aerobic Conditions ◽  
Nanoscale Zerovalent Iron ◽  
Nanoscale Zero Valent Iron ◽  
Insight Into

To gain insight into the mechanism of p-nitrophenol removal using the biochar supported nanoscale zerovalent iron composite and nanoscale zero valent iron under anaerobic or aerobic conditions, batch experiments and models were conducted.

Application of porous styrene resin loaded carboxymethyl cellulose-stabilized nano-zero-valent iron for highly efficient hexavalent chromium removal

2022 ◽  
Author(s):  
Sijing Zeng ◽  
Dengjie Zhong ◽  
Yunlan Xu ◽  
Nianbing Zhong
Keyword(s):  
Liquid Phase ◽  
Hexavalent Chromium ◽  
Carboxymethyl Cellulose ◽  
Reduction Method ◽  
Zero Valent Iron ◽  
Simple Liquid ◽  
Chromium Removal ◽  
Highly Efficient ◽  
Phase Reduction ◽  
Nano Zero Valent Iron

In order to improve the reactivity of nZVI for Cr(VI) removal, porous styrene resin loaded carboxymethyl cellulose-stabilized nano-zero-valent iron (CMC-D201@nZVI) was firstly prepared by the simple liquid phase reduction method....

scholarly journals Synthesis of Nanoscale Zerovalent Iron (nZVI) Supported on Biochar for Chromium Remediation from Aqueous Solution and Soil

2019 ◽  
Vol 16 (22) ◽  
pp. 4430 ◽  
Author(s):  
Haixia Wang ◽  
Mingliang Zhang ◽  
Hongyi Li
Keyword(s):  
Aqueous Solution ◽  
Photoelectron Spectroscopy ◽  
Zero Valent Iron ◽  
Zerovalent Iron ◽  
X Ray ◽  
Nanoscale Zerovalent Iron ◽  
Before And After ◽  
Pseudo Second Order ◽  
Xrd Patterns ◽  
Co Precipitation

Maize straw biochar-supported nanoscale zero-valent iron composite (MSB-nZVI) was prepared for efficient chromium (Cr) removal through alleviating the aggregation of zero-valent iron particles. The removal mechanism of MSB-nZVI was investigated by scanning electron microscopy with energy dispersive X-ray (SEM-EDX), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS). Cr(VI) removal from aqueous solution by MSB-nZVI was greatly affected by pH and initial concentration. The removal efficiency of Cr(VI) decreased with increasing pH, and the removal kinetics followed the pseudo-second-order model. XRD patterns of MSB-nZVI before and after reaction showed that reduction and precipitation/co-precipitation (FeCr2O4, Fe3O4, Fe2O3) occurred with the conversion of Cr(VI) to Cr(III) and Fe(0) to Fe(II)/Fe(III). The produced precipitation/co-precipitation could be deposited on the MSB surface rather than being only coated on the surface of nZVI particles, which can alleviate passivation of nZVI. For remediation of Cr(VI)-contaminated saline–alkali soil (pH 8.6–9.0, Cr 341 mg/kg), the released amount of Cr(VI) was 70.7 mg/kg, while it sharply decreased to 0.6–1.7 mg/kg at pH 4.0–8.0, indicating that the saline–alkali environment inhibited the remediation efficiency. These results show that MSB-nZVI can be used as an effective material for Cr(VI) removal from aqueous solution and contaminated soil.

scholarly journals Gram-scale synthesis of ultra-fine Cu2O for highly efficient ozone decomposition

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5212-5219 ◽  
Author(s):  
Shuyan Gong ◽  
Anqi Wang ◽  
Jilai Zhang ◽  
Jian Guan ◽  
Ning Han ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Room Temperature ◽  
Reduction Method ◽  
Ozone Decomposition ◽  
Highly Efficient ◽  
Phase Reduction

Dozens of grams of ultra-fine Cu2O with efficient ozone decomposition was prepared by a facile liquid phase reduction method at room temperature.

scholarly journals Removal efficiency of hexavalent chromium from wastewater using starch-stabilized nanoscale zero-valent iron

2019 ◽  
Vol 80 (6) ◽  
pp. 1076-1084 ◽  
Author(s):  
Hualin Chen ◽  
Huajun Xie ◽  
Jiangmin Zhou ◽  
Yueliang Tao ◽  
Yongpu Zhang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Reactivity ◽  
Zero Valent Iron ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Reduction ◽  
Nanoscale Zero Valent Iron ◽  
Removal Efficiencies ◽  
Ph Range ◽  
Uniform Particle Size

Abstract In this study, starch-stabilized nanoscale zero-valent iron (S-nZVI) was produced using the liquid-phase reduction method. It was used to remove chromium from wastewater, and compared to a commercial nanoscale zero-valent iron (C-nZVI). Both nZVIs were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The characterization results showed that S-nZVI had smaller particles and a more uniform particle size distribution than C-nZVI. Both nZVIs showed a core-shell structure with the Fe0 core prominently surrounded by less iron oxides of Fe2+ and Fe3+. The optimal application methods to remove Cr(VI) from wastewater were also explored. The results showed that both the removal efficiencies of total Cr and Cr(VI) increased with increases in the addition of nZVIs, while the removal efficiencies of total Cr and Cr(VI) by S-nZVI were clearly higher than that of C-nZVI, especially in a low pH range (pH = 1.0–6.0). This research indicated that starch-stabilized nanoscale zero-valent iron is a valuable material to remove heavy metals from wastewater due to its stability and high reactivity.

An Ni–P/C electro-catalyst with improved activity for the carbohydrazide oxidation reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91956-91959 ◽  
Author(s):  
Xinyue Cao ◽  
Haining Wang ◽  
Shanfu Lu ◽  
Sian Chen ◽  
Yan Xiang
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Oxidation Reaction ◽  
Reduction Method ◽  
Significant Enhancement ◽  
Phase Reduction ◽  
Electro Catalytic Activity

Ni–P/C NPs were prepared through a two-step liquid phase reduction method, which exhibited a significant enhancement for the electro-catalytic activity towards the carbohydrazide oxidation reaction compared with Ni/C NPs.

The influence of different Ni contents on the radar absorbing properties of FeNi nano powders

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16413-16418 ◽  
Author(s):  
Hui Zhao ◽  
Zhenghou Zhu ◽  
Chao Xiong ◽  
Xialian Zheng ◽  
Qianying Lin
Keyword(s):  
Liquid Phase ◽  
Reduction Method ◽  
Phase Reduction ◽  
Absorbing Property ◽  
Better Than

Absorbing property of Fe20Ni80 nanopowder was better than that of other Fe100−xNix powder fabricated by liquid phase reduction method. Absorbing band could be effectively broadened and absorbing property improved through optimal structural designs.

Effects of the Ratio of Surface Protective Agent on the Preparation of Nano-Silver

2012 ◽  
Vol 624 ◽  
pp. 80-83
Author(s):  
Feng Rui Zhai ◽  
Yi Ming Liu ◽  
Jian Ping Yuan ◽  
Hong Wei Zhang ◽  
Zhong Zhou Yi
Keyword(s):  
Liquid Phase ◽  
Reduction Method ◽  
Ph Value ◽  
Silver Powder ◽  
High Surface ◽  
Solution Viscosity ◽  
Protective Agent ◽  
Nano Silver ◽  
Phase Reduction ◽  
The Impact

It has many advantages with liquid phase reduction method to prepare the nano-silver, such as experimental conditions are simple, low cost, energy-saving, etc.. At the same time, the nano silver powder prepared by this method has high surface activity, catalytic property and wide usage. In this paper, nano-silver powder was prepared by changing the amount of protective agents with chemical liquid phase reduction method. This paper focuses on the impact of the amount of protective agent on the nano-silver. In addition, we also analyzed the reaction temperature, PH value of solution, viscosity and electrical conductivity on the preparation of nano-silver. Finally, test results from the TEM shows that the nano-silver was prepared with smaller size, uniform size and good dispersion.

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