One-Step Pyrolysis Process for Recover Zinc and Mercury from Spent Zinc-Manganese Batteries

2010 ◽  
Vol 113-116 ◽  
pp. 2224-2227 ◽  
Author(s):  
Shu Qing Zhao ◽  
Jie Yao ◽  
Xu Zhai ◽  
Xing Bin Sun
Keyword(s):  
Laboratory Tests ◽  
Dominant Factor ◽  
Recovery Efficiency ◽  
Pyrolysis Process ◽  
Sample Weight ◽  
One Step ◽  
Higher Temperature ◽  
Residue Mass

In this paper, One-step pyrolysis process for the recovery of mercury and zinc from spent zinc–manganese batteries is proposed. Laboratory tests were performed to remove mercury and zinc from spent batteries and recover them. Correctitude test were used to analyze the effect of three factors: temperature, weight and time on the removing and recovery efficiency of zinc. In this research, temperature is dominant factor, weight and time are subordinate. After removing mercury, higher temperature could assure the removing efficiency of mercury above 99.9% at the same time of removing zinc. Under 0.02 MPa, efficiency of removing and recycling of zinc were investigated. The removing efficiency is 94.2% at 950 °C and 96.2% at 1000 °C. When the heated time is 1.5 h, the removing efficiency is 95.6%, which reach the aim 95.0%. With the increase of sample weight, the necessary heated time could be kept within 2.5 h without the loss of removing efficiency. The recycling efficiency of zinc could approach 75%. The content of zinc is above 99.0% in condensed zinc product. After being treated, the residue mass is about 40% of sample.

scholarly journals One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shella Permatasari Santoso ◽  
Vania Bundjaja ◽  
Artik Elisa Angkawijaya ◽  
Chintya Gunarto ◽  
Alchris Woo Go ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Gallic Acid ◽  
Synthesis Method ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
One Step ◽  
Detailed Assessment ◽  
Higher Temperature

AbstractNitrogen-grafting through the addition of glycine (Gly) was performed on a metal- phenolic network (MPN) of copper (Cu2+) and gallic acid (GA) to increase its adsorption capacity. Herein, we reported a one-step synthesis method of MPN, which was developed according to the metal–ligand complexation principle. The nitrogen grafted CuGA (Ng-CuGA) MPN was obtained by reacting Cu2+, GA, and Gly in an aqueous solution at a molar ratio of 1:1:1 and a pH of 8. Several physicochemical measurements, such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), N2 sorption, X-ray diffraction (XRD), and thermal gravimetry analysis (TGA), were done on Ng-CuGA to elucidate its characteristics. The analysis revealed that the Ng-CuGA has non-uniform spherical shaped morphology with a pore volume of 0.56 cc/g, a pore size of 23.25 nm, and thermal stability up to 205 °C. The applicational potential of the Ng-CuGA was determined based on its adsorption capacity against methylene blue (MB). The Ng-CuGA was able to adsorb 190.81 mg MB per g adsorbent at a pH of 6 and temperature of 30 °C, which is 1.53 times higher than the non-grafted CuGA. Detailed assessment of Ng-CuGA adsorption properties revealed their pH- and temperature-dependent nature. The adsorption capacity and affinity were found to decrease at a higher temperature, demonstrating the exothermic adsorption behavior.

Oxidation and removal of As(iii) from soil using novel magnetic nanocomposite derived from biomass waste

2019 ◽  
Vol 6 (2) ◽  
pp. 478-488 ◽  
Author(s):  
Jianghu Cui ◽  
Qian Jin ◽  
Yadong Li ◽  
Fangbai Li
Keyword(s):  
Magnetic Nanocomposite ◽  
Pyrolysis Process ◽  
Biomass Waste ◽  
One Step

A novel biomass-derived magnetic nanocomposite, named BMN, was fabricated via one-step pyrolysis process.

P-type CuInSe2 thin films prepared by selenization of one-step electrodeposited precursors

2009 ◽  
Vol 24 (7) ◽  
pp. 2293-2300 ◽  
Author(s):  
Lei Wan ◽  
Yongsheng Cao ◽  
Deliang Wang
Keyword(s):  
Film Surface ◽  
Atomic Ratio ◽  
Flux Agent ◽  
Solar Cell Application ◽  
Element Transport ◽  
Good Crystalline Quality ◽  
One Step ◽  
Higher Temperature ◽  
P Type ◽  
Selenization Temperature

In this study, p-type CuInSe2 (CIS) films were prepared by selenization of one-step electrodeposited Cu-In-2Se (atomic ratio) precursors. To obtain high-quality, dense, and homogeneous CIS films for solar cell application, the effects of substrate temperatures during selenization and precursor compositions on the final microstructures were systematically investigated. The precursor layers evolved in very different ways under different selenization conditions. The final microstructures and phases of the films depended critically on the precursor compositions, selenization temperature, and the selenization thermal process history. Low melting temperature CuxSe phase, which tended to segregate at the film surface, can efficiently assist the CIS grain growth. Large hexagonal CuSe platelets were formed at a temperature as low as 170 °C in Cu-rich precursor, which acted as an element-transport flux agent at higher temperature under high Se vapor and reacted with In-Se selenide to form CIS at temperatures above 500 °C. Good crystalline quality chalcopyrite CIS film was obtained at a selenization temperature of 550 °C.

Cotton pad-derived large-area 3D N-doped graphene-like full carbon cathode with an O-rich functional group for flexible all solid Zn–air batteries

2020 ◽  
Vol 8 (22) ◽  
pp. 11202-11209 ◽  
Author(s):  
Xiangjun Zheng ◽  
Xuecheng Cao ◽  
Kai Zeng ◽  
Zhihui Sun ◽  
Jin Yan ◽  
...  
Keyword(s):  
Solid State ◽  
Functional Group ◽  
Pyrolysis Process ◽  
Large Area ◽  
Air Cathode ◽  
Carbon Cathode ◽  
Doped Graphene ◽  
One Step

A flexible 3D N, O-doped graphene-like full carbon cathode has been synthesized with a cotton pad as a template via a scalable and one-step pyrolysis process, and can be directly used as an efficient air cathode for flexible all solid-state ZABs.

Formation of ultrathin CoSi2 films using a two-step limited reaction process

1993 ◽  
Vol 8 (12) ◽  
pp. 3111-3121 ◽  
Author(s):  
R.J. Schreutelkamp ◽  
W. Coppye ◽  
W. De Bosscher ◽  
R. van Meirhaeghe ◽  
L. van Meirhaeghe ◽  
...  
Keyword(s):  
Reaction Process ◽  
Si Substrates ◽  
Selective Etch ◽  
One Step ◽  
Higher Temperature ◽  
The One ◽  
20 Nm

The formation of ultrathin (≤20 nm) and smooth CoSi2 layers on c–Si substrates has been studied by using a one- and a two-step RTP silicidation method. Pinhole-free silicide layers with a thickness down to ∼10–12 nm were formed on n−, n+, and p+ crystalline Si substrates in the one-step RTP process by sputtering of Co films as thin as 4 nm and subsequent silicidation at 750 °C for 5 or 30 s. The two-step RTP silicidation method is based on the consumption of only a small fraction of a thick sputtered Co film to form Co2Si or CoSi during a first RTP step at 400–500 °C. A selective etch follows to remove the unreacted Co film. During a second, higher temperature, RTP step CoSi2 is formed. Pinhole-free and smooth CoSi2 films with a thickness down to 20 nm were formed in this way on both n+ and p+ monocrystalline Si substrates.

scholarly journals Photocatalytic Reduction of Cr (VI) over g-C3N4 Photocatalysts Synthesized by Different Precursors

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 7054
Author(s):  
Juan Liang ◽  
Chengjun Jing ◽  
Jiarong Wang ◽  
Yupawang Men
Keyword(s):  
Surface Area ◽  
Carbon Nitride ◽  
Hydrogen Adsorption ◽  
Direct Reduction ◽  
Reduction Process ◽  
Photocatalytic Reduction ◽  
Pyrolysis Process ◽  
Photogenerated Electrons ◽  
One Step ◽  
Amine Groups

Graphitic carbon nitride (g-C3N4) photocatalysts were synthesized via a one-step pyrolysis process using melamine, dicyandiamide, thiourea, and urea as precursors. The obtained g-C3N4 materials exhibited a significantly different performance for the photocatalytic reduction of Cr(VI) under white light irradiation, which is attributed to the altered structure and occupancies surface groups. The urea-derived g-C3N4 with nanosheet morphology, large specific surface area, and high occupancies of surface amine groups exhibited superior photocatalytic activity. The nanosheet morphology and large surface area facilitated the separation and transmission of charge, while the high occupancies of surface amine groups promoted the formation of hydrogen adsorption atomic centers which were beneficial to Cr(VI) reduction. Moreover, the possible reduction pathway of Cr(VI) to Cr(III) over the urea-derived g-C3N4 was proposed and the reduction process was mainly initiated by a direct reduction of photogenerated electrons.

Pb(Zr0.95Ti0.05)O3 powders and porous ceramics prepared by one-step pyrolysis process using non-aqueous Pechini method

2009 ◽  
Vol 35 (2) ◽  
pp. 733-740 ◽  
Author(s):  
Shaojun Qiu ◽  
Xiaodong Zheng ◽  
Chao Gao ◽  
Xiaoxian Gan ◽  
Jin Chen ◽  
...  
Keyword(s):  
Pechini Method ◽  
Porous Ceramics ◽  
Pyrolysis Process ◽  
One Step

Crystallization of YBa2Cu3O7-y films on SrTiO3(100) by postannealing of precursors prepared by dipping-pyrolysis process

1994 ◽  
Vol 9 (4) ◽  
pp. 858-865 ◽  
Author(s):  
T. Manabe ◽  
W. Kondo ◽  
S. Mizuta ◽  
T. Kumagai
Keyword(s):  
Annealing Temperature ◽  
Pyrolysis Process ◽  
Oriented Growth ◽  
Ybco Films ◽  
Annealing Conditions ◽  
Heat Treated ◽  
Different Types ◽  
Higher Temperature ◽  
Temperature Side ◽  
Process Annealing

The effects of annealing temperature and oxygen partial pressure [p(O2)] were investigated on the crystallization and orientation of superconducting YBa2Cu3O7-y (YBCO) films on SrTiO3(100) prepared by the dipping-pyrolysis process. Annealing conditions for precursor films consisting of a Y2O3—BaCO3—CuO mixture were varied in the temperature range 700–850 °C and initial p(O2) range 2 × 10-4-10-2 atm followed by pure O2 treatment. Three different types of crystallization behavior were observed. The c-axis-oriented epitaxial YBCO films were obtained on the lower p(O2) and higher temperature side in the p(O2)-T diagram. The c/a-axis-oriented growth was observed in films heat-treated at 750–800 °C under p(O2) of 10-3 atm. In addition, mixtures of YBCO and YBa2Cu4O8 resulted when the films were annealed at 700 °C.

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