Relevant bibliographies by topics / Sulfidation reaction / Journal articles

Journal articles on the topic 'Sulfidation reaction'

To see the other types of publications on this topic, follow the link: Sulfidation reaction.
Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Sulfidation reaction.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Li, Cun Xiong, Chang Wei, Yan Song, Zhi Gan Deng, Ji Qiang Liao, Hong Sheng Xu, Min Ting Li, and Xin Bing Li. "Hydrothermal Sulfidation of White Lead with Elemental Sulfur." Advanced Materials Research 396-398 (November 2011): 624–30. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.624.

Full text
Abstract:
Hydrothermal sulfidation of pure white lead with elemental sulfur has been studied in the present paper. The variables considered in the study were temperature, time, particle size and elemental sulfur fraction in the reacting mixture. Temperature and time were the most two important factors, with an increase in temperature and holding time the sulfidation extent of lead improved greatly and the constituent of products changed a lot. At temperatures above 140°C, PbS and PbSO4 were the only stable reaction products in the sulfidation of white lead. The experimental data indicated that under the hydrothermal conditions with a particle size of -58+48 μm and sulfur fraction in reacting mixture of 8% at 140 °C for 90 min, and 86% of lead sulfidation extent was achieved.
APA, Harvard, Vancouver, ISO, and other styles
2

Zhang, Fan, Andrew J. Allen, Aaron C. Johnston-Peck, Jingyu Liu, and John M. Pettibone. "Transformation of engineered nanomaterials through the prism of silver sulfidation." Nanoscale Advances 1, no. 1 (2019): 241–53. http://dx.doi.org/10.1039/c8na00103k.

Full text
Abstract:
Silver sulfidation under environmentally relevant conditions follows a first-order reaction kinetics without aggregation or dissolution. Rate and extent of sulfidation demonstrates strong dependence on the crystallographic orientation of the facets.
APA, Harvard, Vancouver, ISO, and other styles
3

Kim, Min Soo, Malenahalli Halappa Naveen, Rizwan Khan, and Jin Ho Bang. "Iterative oxidation and sulfidation reactions: revival of bulk cobalt sulfide into an active electrocatalyst for the oxygen evolution reaction." Journal of Materials Chemistry A 8, no. 16 (2020): 7647–52. http://dx.doi.org/10.1039/d0ta01578d.

Full text
Abstract:
A thermal route based on iterative oxidation and sulfidation reactions opens a new way to revive a bulk sulfide into an active electrocatalyst that would have otherwise performed poorly for the oxygen evolution reaction.
APA, Harvard, Vancouver, ISO, and other styles
4

Hong, Sungwook, Aravind Krishnamoorthy, Chunyang Sheng, Rajiv K. Kalia, Aiichiro Nakano, and Priya Vashishta. "A Reactive Molecular Dynamics Study of Atomistic Mechanisms During Synthesis of MoS2 Layers by Chemical Vapor Deposition." MRS Advances 3, no. 6-7 (2018): 307–11. http://dx.doi.org/10.1557/adv.2018.67.

Full text
Abstract:
ABSTRACTTransition metal dichalcogenide (TMDC) monolayers like MoS2 are promising materials for future electronic applications. Large-area monolayer MoS2 samples for these applications are typically synthesized by chemical vapor deposition (CVD) using MoO3 reactants and gas-phase sulfur precursors. Recent experimental studies have greatly improved our understanding of reaction pathways in the CVD growth process. However, atomic mechanisms of sulfidation process remain to be fully elucidated. In this work, we present quantum-mechanically informed and validated reactive molecular dynamics (RMD) simulations for CVD synthesis of MoS2 layers using S2 precursors. Our RMD simulations clarify atomic-level reaction pathways for the sulfidation of MoO3 surfaces by S2, which is a critical reaction step for CVD synthesis of MoS2 layers. These results provide a better understanding of the sulfidation process for the scalable synthesis of defect-free MoS2 and other TMDC materials.
APA, Harvard, Vancouver, ISO, and other styles
5

Perrin, Kévin, David Chiche, Javier Perez-Pellitero, Olivier Politano, and Sébastien Chevalier. "Investigation of Solid State Diffusion Processes Involved in the Zinc Oxide Sulfidation Reaction." Diffusion Foundations 9 (October 2016): 100–110. http://dx.doi.org/10.4028/www.scientific.net/df.9.100.

Full text
Abstract:
Sulfidation of undoped and aluminum doped zinc oxide materials has been performed by TGA under a H2S atmosphere in order to evaluate the impact of the doping element on sulfidation reaction kinetics and mechanism. The presence of aluminum seems to slow-down the reaction kinetics. This phenomenon might be explained by a modification of the solid state diffusion processes involved in ZnO sulfidation reaction and the related ZnS outward growth, assuming the presence of aluminum atoms inside ZnO and ZnS phases. In order to determine solid state diffusion mechanisms controlling the reaction kinetics, molecular dynamics simulations were performed using a Coulomb-Buckingham potential. Firstly, the diffusion of the different elements (Zn, O, S) was simulated for both the oxide and sulfide phases considering a vacancy mechanism. Secondly, simulations of the oxide phase doped by a trivalent cation were also performed. The results obtained in this preliminary work are presented and compared to the literature.
APA, Harvard, Vancouver, ISO, and other styles
6

Gogos, Alexander, Basilius Thalmann, Andreas Voegelin, and Ralf Kaegi. "Sulfidation kinetics of copper oxide nanoparticles." Environmental Science: Nano 4, no. 8 (2017): 1733–41. http://dx.doi.org/10.1039/c7en00309a.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

LIU, DONGJING, WEIGUO ZHOU, and JIANG WU. "TEXTURE AND STRUCTURE VARIATION OF PEROVSKITE LaFeO3/ZSM-5 DURING HIGH-TEMPERATURE DESULFURIZATION." Surface Review and Letters 27, no. 05 (August 28, 2019): 1950151. http://dx.doi.org/10.1142/s0218625x19501518.

Full text
Abstract:
Perovskite LaFeO3/ZSM-5 is synthesized via citrate route for H2S removal at high temperatures. It shows good thermal stability after heat treatment at 500–700∘C with respect to slight changes in crystallographic phase and textural property. It presents the optimal desulfurization performance at 600∘C with sulfur capacity of 1017[Formula: see text][Formula: see text]mol[Formula: see text]S/g and products of S, LaS2, and Fe7S8. Sulfidation at 500∘C yields the same products as sulfidation at 600∘C but displays the lowest sulfur capacity of 408[Formula: see text][Formula: see text]mol[Formula: see text]S/g. Sulfidation at 700∘C produces La2O2S, Fe3S4, and unreacted LaFeO3. The activation energy of the sulfidation reaction over LaFeO3/ZSM-5 is 109.6[Formula: see text]kJ/mol.
APA, Harvard, Vancouver, ISO, and other styles
8

Xu, Shujun, Siwei Fan, Wenqing Ma, Jiabao Fan, and Guangda Li. "Electrochemical reaction behavior of MnS in aqueous zinc ion battery." Inorganic Chemistry Frontiers 9, no. 7 (2022): 1481–89. http://dx.doi.org/10.1039/d1qi01659h.

Full text
Abstract:
MnS/C nanosheets were prepared via the sulfidation of the Mn-based organometallic precursor. When served as the zinc ion battery cathode material, MnS/C shows high ion diffusion kinetics and cyclability.
APA, Harvard, Vancouver, ISO, and other styles
9

Yang, Tianzu, Bin Hu, Weifeng Liu, Duchao Zhang, and Lin Chen. "Selective separation of copper from copper-smelting waste acid by potential control." Metallurgical Research & Technology 116, no. 4 (2019): 409. http://dx.doi.org/10.1051/metal/2018134.

Full text
Abstract:
An oxidation-sulfidation process by potential control was proposed for the separation of the Cu from copper-smelting waste acid (CSWA). This process consists of two steps: the oxidation of As (III) and the sulfidation of Cu by potential control. For the oxidation step, the oxidation efficiency of As (III) reached 99.4% under the following optimal conditions: a potential of 820 mV, temperature of 25 °C, and reaction time of 10 min. Subsequently, Na2S solution was pumped to the oxidized-CSWA and 99.4% of the Cu and 1.8% of the As were precipitated under the following optimal conditions: a potential of 508 mV, temperature of 25 °C, initial pH of 1.0, and reaction time of 30 min. It is confirmed that, the oxidation of As is the pre-requisite step for the selective separation of the Cu from CSWA via the sulfidation process. Therefore, the novel process realized a selective separation of the Cu, as well as provided an alternative option for the treatment of non-ferrous smelting waste acid.
APA, Harvard, Vancouver, ISO, and other styles
10

Li, Lei, Kwan San Hui, Kwun Nam Hui, and Young-Rae Cho. "Ultrathin petal-like NiAl layered double oxide/sulfide composites as an advanced electrode for high-performance asymmetric supercapacitors." Journal of Materials Chemistry A 5, no. 37 (2017): 19687–96. http://dx.doi.org/10.1039/c7ta06119f.

Full text
Abstract:
We develop a facile approach to synthesize ultrathin petal-like NiAl layered double oxide/sulfide (LDO/LDS) composites with high electrochemical activity using hydrothermal reaction followed by sulfidation process.
APA, Harvard, Vancouver, ISO, and other styles
11

Gu, Yuxing, Zhigang Chen, Juanjuan Tang, Wei Xiao, Xuhui Mao, Hua Zhu, and Dihua Wang. "Sulfur doped reduced graphene oxides with enhanced catalytic activity for oxygen reduction via molten salt redox-sulfidation." Physical Chemistry Chemical Physics 18, no. 48 (2016): 32653–57. http://dx.doi.org/10.1039/c6cp06818a.

Full text
Abstract:
A facile redox-sulfidation reaction between sulfate containing molten carbonates and reduced graphene oxides (rGOs) was used to prepare sulfur and sulfur–cobalt co-doped rGOs with enhanced electrocatalytic activity.
APA, Harvard, Vancouver, ISO, and other styles
12

Zhang, Bowei, Guang Yang, Chaojiang Li, Kang Huang, Junsheng Wu, Shiji Hao, Jianyong Feng, Dongdong Peng, and Yizhong Huang. "Phase controllable fabrication of zinc cobalt sulfide hollow polyhedra as high-performance electrocatalysts for the hydrogen evolution reaction." Nanoscale 10, no. 4 (2018): 1774–78. http://dx.doi.org/10.1039/c7nr08097b.

Full text
Abstract:
Zn–Co–S hollow/porous polyhedrons with controllable phases were fabricatedviasolvent-based sulfidation at room temperature followed by thermal annealing, which exhibit an excellent electrocatalytic HER activity.
APA, Harvard, Vancouver, ISO, and other styles
13

van der Vlies, A. J., G. Kishan, J. W. Niemantsverdriet, R. Prins, and Th Weber. "Basic Reaction Steps in the Sulfidation of Crystalline Tungsten Oxides." Journal of Physical Chemistry B 106, no. 13 (April 2002): 3449–57. http://dx.doi.org/10.1021/jp0138734.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Liao, Bin, Lei LI, Hua Wang, and Xiu Li Sang. "Thermodynamic Study on the Sulfidation-Magnetic Roasting of the Hematite Type of Tin-Bearing Iron Ore." Applied Mechanics and Materials 472 (January 2014): 596–602. http://dx.doi.org/10.4028/www.scientific.net/amm.472.596.

Full text
Abstract:
Sulfidation-magnetic roasting process was used to treat tin-bearing iron ore of hematite to recovery iron resources. The results of thermodynamics analysis of the roasting reaction trait showed that, when CO concentration was lower than 11.43% at temperature higher than 873K, SnO2 and Fe2O3 could be selectively reduced to SnO and Fe3O4, respectively. FeS2 would be decomposed into FeS and S2 during the roasting process, and the S2 sulfidation effect was stronger than FeS. After roasting, the main iron phase of the minerals was changed into magnetite from hematite and then the iron could be recovered through the magnetic separation. This method provides a new method for the recovery of iron from tin-bearing iron ore of hematite.
APA, Harvard, Vancouver, ISO, and other styles
15

Kumar, Naresh, Juan Lezama Pacheco, Vincent Noël, Gabrielle Dublet, and Gordon E. Brown. "Sulfidation mechanisms of Fe(iii)-(oxyhydr)oxide nanoparticles: a spectroscopic study." Environmental Science: Nano 5, no. 4 (2018): 1012–26. http://dx.doi.org/10.1039/c7en01109a.

Full text
Abstract:
We used synchrotron-based X-ray absorption spectroscopy, transmission electron microscopy, and wet chemical analyses to study the sulfidation mechanism(s) and sulfur oxidation products from the reaction of ferrihydrite, goethite, and hematite nanoparticles with dissolved sulfide at different S/Fe molar ratios under anaerobic condition.
APA, Harvard, Vancouver, ISO, and other styles
16

Du, Zhonglin, Jing Tong, Wenxia Guo, Hua Zhang, and Xinhua Zhong. "Cuprous sulfide on Ni foam as a counter electrode for flexible quantum dot sensitized solar cells." Journal of Materials Chemistry A 4, no. 30 (2016): 11754–61. http://dx.doi.org/10.1039/c6ta04934f.

Full text
Abstract:
A Cu2S/Ni foam CE has been fabricated via a redox reaction between Ni and Cu ions followed by sulfidation. The as-prepared bendable CE shows superior catalytic activity and conductivity. The assembled flexible CdSe QDSCs exhibit the highest conversion efficiency of 3.55% reported to date.
APA, Harvard, Vancouver, ISO, and other styles
17

Lim, Dongwook, Hyein Hwang, Taewoo Kim, Sang Eun Shim, and Sung-Hyeon Baeck. "Fabrication and Characterization of Amorphous Cobalt-Doped Molybdenum Sulfide for Hydrogen Evolution Reaction." Journal of Nanoscience and Nanotechnology 15, no. 10 (October 1, 2015): 8257–62. http://dx.doi.org/10.1166/jnn.2015.11441.

Full text
Abstract:
In the present study, hydrogen evolution reaction (HER) by alkaline water electrolysis was conducted without using a precious metal catalyst. We synthesized an amorphous cobalt-doped molybdenum sulfide by electrodeposition using different cobalt loadings. The amorphous Co-MoSx produced was characterized by scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The cobalt doping and sulfidation procedure resulted in the successful fabrication of a candidate catalyst for the catalytic hydrogen evolution in alkaline solution with high intrinsic activity. Cobalt incorporated amorphous MoSx exhibited 3 times higher HER activity than non-promoted MoSx.
APA, Harvard, Vancouver, ISO, and other styles
18

Sakai, Norio, Hiromu Maeda, and Yohei Ogiwara. "Copper-Catalyzed Three-Component Coupling Reaction of Aryl Iodides, a Disilathiane, and Alkyl Benzoates Leading to a One-Pot Synthesis of Alkyl Aryl Sulfides." Synthesis 51, no. 11 (March 18, 2019): 2323–30. http://dx.doi.org/10.1055/s-0037-1610869.

Full text
Abstract:
A copper-catalyzed three-component coupling reaction of aryl iodides, hexamethyldisilathiane and alkyl benzoates leading to alkyl aryl sulfides has been demonstrated. A disilathiane acted as both a sulfur source and a promoter of the sulfidation, and the alkyl moiety of the alkyl benzoate was effectively introduced on one side of the sulfide. Moreover, we found that the protocol can be expanded to the preparation of ethyl phenyl selenide with diphenyl diselenide.
APA, Harvard, Vancouver, ISO, and other styles
19

Xu, Cuimin, Qiaoqin Xie, Fan Xu, Yuefei Zhou, Hanlin Wang, Tianhu Chen, and Shuchuan Peng. "Preparation of Monoclinic Pyrrhotite by Thermal Decomposition of Jarosite Residues and Its Heavy Metal Removal Performance." Minerals 11, no. 3 (March 5, 2021): 267. http://dx.doi.org/10.3390/min11030267.

Full text
Abstract:
Jarosite residues produced by zinc hydrometallurgical processing are hazardous solid wastes. In this study, monoclinic pyrrhotite (M-Po) was prepared by the pyrolysis of jarosite residues in H2S atmosphere. The influence of gas speed, reaction temperature, and time was considered. The mineral phase, microstructure, and elemental valence of the solids before and after pyrolysis were analyzed using X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, respectively. The performances of the prepared M-Po on the removal of Zn and Pb from aqueous solution were evaluated. The results show M-Po to be the sole product at the reaction temperatures of 550 to 575 °C. Most of the M-Po particles are at the nanometer scale and display xenomorphic morphology. The phase evolution process during pyrolysis is suggested as jarosite → hematite/magnetite → pyrite → pyrite+M-Po → M-Po+hexagonal pyrrhotite (H-Po) → H-Po. The formation rate, crystallinity, and surface microtexture of M-Po are controlled by reaction temperature and time. Incomplete sulfidation may produce coarse particles with core–shell (where the core is oxide and the shell is sulfide) and triple-layer (where the core is sulfate, the interlayer is oxide, and the shell is sulfide) structures. M-Po produced at 575 °C exhibits an excellent heavy metal removal ability, which has adsorption capacities of 25 mg/g for Zn and 100 mg/g for Pb at 25 °C and pH ranges from 5 to 6. This study indicates that high-temperature sulfidation is a novel and efficient method for the treatment and utilization of jarosite residues.
APA, Harvard, Vancouver, ISO, and other styles
20

Jung, Sun Young, and HyukSu Han. "Sulfur-Incorporated Nickel-Iron Layered Double Hydroxides for Effective Oxygen Evolution Reaction in Seawater." Ceramist 25, no. 1 (March 31, 2022): 15–30. http://dx.doi.org/10.31613/ceramist.2022.25.1.08.

Full text
Abstract:
Given the abundance of water on the surface of the Earth, water splitting using seawater may be an effective solution to the future energy crisis. However, oxygen evolution reaction (OER) electrocatalysts require several specific characteristics to be used in seawater electrolysis, such as high catalytic activity, selectivity, and resistivity against chlorine corrosion. This paper reports that sulfur incorporation into nickel– iron layered double hydroxide (NiFe-LDH-S) can fulfill the abovementioned requirements for seawater oxidation. Sulfidation was performed on NiFe-LDH nanosheets homogeneously grown on a porous carbon scaffold via a facile chemical vapor deposition (CVD) process. The best NiFe-LDH-S sample demonstrated excellent catalytic activity with a high corrosion resistance for seawater oxidation.
APA, Harvard, Vancouver, ISO, and other styles
21

Wu, Xiujuan, Jie Wang, Fan Zhang, Junyan Gong, Pinghao Xu, Yingchen Xu, and Dongen Zhang. "Synthesis of the rod-like NiS2@C for hydrogen evolution reaction in acidic solution." Functional Materials Letters 13, no. 02 (January 23, 2020): 2050009. http://dx.doi.org/10.1142/s1793604720500095.

Full text
Abstract:
The carbon-based NiS2 nanorods (NiS2@C) were prepared by chemical deposition and sulfidation with nickel dimethylglyoximate (Ni(DMG)2) as the starting agent. The nanorods were analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy for chemical analysis. Structural characterization revealed that NiS2 existed on the surface of the rod and in the internal channels of the rod. In 0.5[Formula: see text]m H2SO4 solution, NiS2@C has lower onset potential and higher current density than NiS2. The results suggest that C improves the electrical conductivity of the NiS2 electrocatalyst, and the carbon film-based rod-like NiS2 is a more effective nanocomposite of hydrogen evolution.
APA, Harvard, Vancouver, ISO, and other styles
22

Bak, Sang Hwan, and Dong Bok Lee. "High Temperature SO2-Gas Corrosion of Ni-Cr-Co Base Superalloy between 800 and 1000°C." Defect and Diffusion Forum 312-315 (April 2011): 451–54. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.451.

Full text
Abstract:
The Ni-base superalloy, INCONEL740, whose major alloying elements are 24.31 wt.%Cr-20 wt.%Co, was corroded in an Ar-0.2%SO2-gas atmosphere between 800 and 1000oC for 50, and 100 hr in an electric furnace. The scales formed after SO2-gas corrosion tests were generally adherent at 800 and 900oC. At 1000oC, massive scale spallation however occurred over the entire surface. The scales consisted of Cr2O3, (Ni,Co)Cr2O4, and TiO2, indicating that not sulfidation but an oxidation reaction prevailed owing to the thermodynamic stability of concerning oxides.
APA, Harvard, Vancouver, ISO, and other styles
23

Jin, Peng, Winston Robbins, and Gheorghe Bota. "Kinetic Reaction Modeling of Naphthenic Acid Corrosion and Sulfidation in Refineries—A Mechanistic Model." CORROSION 74, no. 12 (August 29, 2018): 1351–62. http://dx.doi.org/10.5006/2880.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Zeuthen, Per, Peder Blom, Brian Muegge, and F. E. Massoth. "Temperature-programmed sulfidation and oxidation of Ni-Mo/alumina catalysts and reaction with ammonia." Applied Catalysis 68, no. 1 (January 1991): 117–30. http://dx.doi.org/10.1016/s0166-9834(00)84097-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Blanchard, Juliette, Kyoko K. Bando, Takashi Matsui, Masaru Harada, Michèle Breysse, and Yuji Yoshimura. "Ruthenium sulfide clusters in acidic zeolites: In situ XAS characterization during sulfidation and reaction." Applied Catalysis A: General 322 (April 16, 2007): 98–105. http://dx.doi.org/10.1016/j.apcata.2007.01.014.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Tetzlaff, David, Vasanth Alagarasan, Christopher Simon, Daniel Siegmund, Kai junge Puring, Roland Marschall, and Ulf-Peter Apfel. "[NiFe]-(Oxy)Sulfides Derived from NiFe2O4 for the Alkaline Hydrogen Evolution Reaction." Energies 15, no. 2 (January 13, 2022): 543. http://dx.doi.org/10.3390/en15020543.

Full text
Abstract:
The development of noble-metal-free electrocatalysts is regarded as a key factor for realizing industrial-scale hydrogen production powered by renewable energy sources. Inspired by nature, which uses Fe- and Ni-containing enzymes for efficient hydrogen generation, Fe/Ni-containing chalcogenides, such as oxides and sulfides, received increasing attention as promising electrocatalysts to produce hydrogen. We herein present a novel synthetic procedure for mixed Fe/Ni (oxy)sulfide materials by the controlled (partial) sulfidation of NiFe2O4 (NFO) nanoparticles in H2S-containing atmospheres. The variation in H2S concentration and the temperature allows for a precise control of stoichiometry and phase composition. The obtained sulfidized materials (NFS) catalyze the hydrogen evolution reaction (HER) with increased activity in comparison to NFO, up to −10 and −100 mA cm−2 at an overpotential of approx. 250 and 450 mV, respectively.
APA, Harvard, Vancouver, ISO, and other styles
27

Liang, Yuan-Chang, and Nian-Cih Xu. "Synthesis of TiO2–ZnS nanocomposites via sacrificial template sulfidation and their ethanol gas-sensing performance." RSC Advances 8, no. 40 (2018): 22437–46. http://dx.doi.org/10.1039/c8ra04157a.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Akple, Maxwell Selase, and Holali Kwami Apevienyeku. "Synthesis and density-functional-theory calculations of electronic band structure of hollow sphere WS2." Materials Science-Poland 36, no. 3 (September 1, 2018): 409–18. http://dx.doi.org/10.2478/msp-2018-0052.

Full text
Abstract:
AbstractA novel and low-cost synthesis of tungsten disulfide (WS2) transition metal dichalcogenide was carried out via gas-solid reaction in a horizontal quartz reactor. In this process, the prepared hollow WO3 precursor was sulfided with CS2 at 550 °C at different durations under N2 gas atmosphere. The as-prepared WS2 samples were formed by substitution of O by S during the sulfidation process. The characterization of these samples was performed employing X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), Brunauer-Emmett-Teller (BET) specific surface area, X-ray photoelectron spectroscopy (XPS) and UV-Vis absorption spectroscopy. The characterization results showed that the as-prepared WS2 samples were of high quality and purity. No significant differences were observed in various WS2 samples synthesized during different sulfidation periods. The calculated results obtained from the density functional theory (DFT) indicate that WS2 has an indirect band gap of ca. 1.56 eV, which is in agreement with experimental band gap of ca. 1.50 eV. Combining the experimental and DFT results suggests that the novel method used in the synthesis of WS2 has a potential application for large scale production. The obtained WS2 are of high quality and can be implemented in photocatalysis, catalysis, photovoltaics, optoelectronic devices and photosensor devices.
APA, Harvard, Vancouver, ISO, and other styles
29

Liu, Jingyu, Fan Zhang, Andrew J. Allen, Aaron C. Johnston-Peck, and John M. Pettibone. "Comparing sulfidation kinetics of silver nanoparticles in simulated media using direct and indirect measurement methods." Nanoscale 10, no. 47 (2018): 22270–79. http://dx.doi.org/10.1039/c8nr06668j.

Full text
Abstract:
Reported reaction kinetics of metal nanoparticles in natural and engineered systems commonly have used proxy measurements to infer chemical transformations, but extension of these methods to complex media has proven difficult.
APA, Harvard, Vancouver, ISO, and other styles
30

Velásquez, Milagros, Alba B. Vidal, Anelisse Bastardo, Raquel del Toro, Jesús Rodríguez, Rafael Añez, Paulino Betancourt, Joaquín Brito, Yosslen Aray, and David S. Coll. "DFT study of the sulfidation pretreatment of molybdenum carbides in the hydrodechlorination reaction of chlorobenzene." Journal of Computational Methods in Sciences and Engineering 14, no. 1-3 (March 20, 2014): 169–77. http://dx.doi.org/10.3233/jcm-140494.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

JIANG, Guo-min, Bing PENG, Li-yuan CHAI, Qing-wei WANG, Mei-qing SHI, Yun-yan WANG, and Hui LIU. "Cascade sulfidation and separation of copper and arsenic from acidic wastewater via gas-liquid reaction." Transactions of Nonferrous Metals Society of China 27, no. 4 (April 2017): 925–31. http://dx.doi.org/10.1016/s1003-6326(17)60107-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Jothimurugesan, K., and Douglas P. Harrison. "Reaction between hydrogen sulfide and zinc oxide-titanium oxide sorbents. 2. Single-pellet sulfidation modeling." Industrial & Engineering Chemistry Research 29, no. 7 (July 1990): 1167–72. http://dx.doi.org/10.1021/ie00103a013.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Ziegler, Elisabeth, Johannes Macher, Dieter Gruber, Peter Pölt, Wolfgang Kern, Thomas Lummerstorfer, Claudia Feldgitscher, Armin Holzner, and Gregor Trimmel. "INVESTIGATION OF THE INFLUENCE OF STEARIC ACID ON RUBBER–BRASS ADHESION." Rubber Chemistry and Technology 85, no. 2 (June 1, 2012): 264–76. http://dx.doi.org/10.5254/rct.12.88940.

Full text
Abstract:
Abstract The influence of stearic acid loading on the adhesion of rubber to brass-plated steel wires was investigated. The so-called squalene method was employed to investigate the adhesion interface built up during the vulcanization reaction. Variation of the stearic acid loading has a direct influence on the bonding interface and at the same time also has a strong influence on the rubber properties. The surface of the sulfidated wires was analyzed using optical, focus variation, and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. Increasing amounts of stearic acid accelerated the sulfidation reaction. Furthermore the focus variation microscopy data were used to calculate roughness parameters of the sulfidated wires. Rubber properties and adhesion values were measured for natural rubber compounds with variable amounts of stearic acid. In most cases the adhesive strength exceeded the cohesive strength of the rubber.
APA, Harvard, Vancouver, ISO, and other styles
34

Shakhmatov, Aleksey, Robert Badrak, William Howie, and Sergey Kolesov. "Silver braze corrosion in H2S environment: life assessment and methods of preventing." E3S Web of Conferences 121 (2019): 04012. http://dx.doi.org/10.1051/e3sconf/201912104012.

Full text
Abstract:
Issues of using silver as the braze material in H2S environment are discussed due to environment related sulfidation which cause corrosion penetration and risk of compromising seals. To explore risk and mitigation techniques, static H2S high temperature silver braze corrosion tests were conducted. The results are presented and interpreted by Arrhenius equation approach. The corrosion rate decreased with time due to the formation of Ag2S corrosion product layer. This corrosion product changed the chemical reaction type from mass transfer controlled to diffusion controlled. The environment temperature vs braze joint thickness vs guarantee period relationships are shown and discussed. Additionally, possible protection options connected with metallic and non-metallic coating were investigated.
APA, Harvard, Vancouver, ISO, and other styles
35

Wang, Hui, Sixiang Cai, Liang Shan, Min Zhuang, Nan Li, Guixiang Quan, and Jinlong Yan. "Adsorptive and Reductive Removal of Chlorophenol from Wastewater by Biomass-Derived Mesoporous Carbon-Supported Sulfide Nanoscale Zerovalent Iron." Nanomaterials 9, no. 12 (December 16, 2019): 1786. http://dx.doi.org/10.3390/nano9121786.

Full text
Abstract:
Chlorinated compounds in a water environment pose serious threats to humanity. A nanoscale zerovalent iron (nZVI) has desirable properties for water dichlorination, but its reactivity is still limited by agglomeration and oxidation. In this study, the mesoporous carbon (MC) derived from biomass waste was prepared for immobilizing nZVI, and the nZVI@MC was further modified by sulfur (S-nZVI@MC) to relieve surface oxidation. The synergistic effect between nZVI and surface modification, the reaction conditions and the removal mechanism were investigated systematically. The characterization results showed nZVI was successfully loaded on the surface of MC, and the aggregation of nZVI was prevented. Moreover, sulfidation modification resulted in the formation of FeS on the surface of nZVI, which effectively alleviated surface oxidation of nZVI and promoted the electron transfer. Batch experiments demonstrated S-nZVI@MC had greatly enhanced reactivity towards 2,4,6-trichlorphenol (TCP) as compared to MC and nZVI, and the removal rate could reach 100%, which was mainly attributed to the significant synergistic effect of MC immobilization and sulfidation modification. Furthermore, the TCP removal process was well described by a Langmuir adsorption model and pseudo-second-order model. The possible mechanism for enhanced removal of TCP is the fast adsorption onto S-nZVI@MC and effective reduction by S-nZVI. Therefore, with excellent reducing activity and antioxidation, S-nZVI@MC has the potential as a pollutant treatment.
APA, Harvard, Vancouver, ISO, and other styles
36

Kaluža, Luděk, Karel Soukup, Martin Koštejn, Jiří Čejka, Jindřich Karban, Radostina Palcheva, Marek Laube, and Daniela Gulková. "On Stability of High-Surface-Area Al2O3, TiO2, SiO2-Al2O3, and Activated Carbon Supports during Preparation of NiMo Sulfide Catalysts for Parallel Deoxygenation of Octanoic Acid and Hydrodesulfurization of 1-Benzothiophene." Catalysts 12, no. 12 (December 2, 2022): 1559. http://dx.doi.org/10.3390/catal12121559.

Full text
Abstract:
NiMo sulfide catalysts were prepared by the impregnation of high surface area supports with an aqueous solution made of NiCO3·2Ni(OH)2, MoO3 and citric acid, followed by freeze drying and sulfidation in H2S/H2 mixture. N2 physisorption and X-ray diffraction were selected to investigate the amphoteric oxides Al2O3 and TiO2, acidic SiO2-Al2O3 and activated carbon supports, fresh prepared sulfide NiMo catalysts and spent catalysts after model parallel reaction of octanoic acid deoxygenation and 1-benzothiophene hydrodesulfurization. The studied mesoporous amphoteric oxides Al2O3 and TiO2 did not lead to highly active NiMo catalysts due to the low hydrothermal stability of these supports during the preparation of the active sulfide phase and deoxygenation reaction. The most active catalyst based on oxidic support was the NiMo sulfide supported on acidic mesoporous SiO2-Al2O3, which was explained by the increased stability of this support to the water and CO/CO2 mixture during the activation of the sulfidic phase and deoxygenation reaction. The extraordinarily high stability of the activated carbon support led to outstanding activities of the sulfidic NiMo/C catalyst.
APA, Harvard, Vancouver, ISO, and other styles
37

Neveux, Laure, David Chiche, Javier Pérez-Pellitero, Loïc Favergeon, Anne-Sophie Gay, and Michèle Pijolat. "New insight into the ZnO sulfidation reaction: mechanism and kinetics modeling of the ZnS outward growth." Phys. Chem. Chem. Phys. 15, no. 5 (2013): 1532–45. http://dx.doi.org/10.1039/c2cp42988h.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Luo, Heng, Hang Lei, Yufei Yuan, Yongyin Liang, Yi Qiu, Zonglong Zhu, and Zilong Wang. "Engineering Ternary Copper-Cobalt Sulfide Nanosheets as High-performance Electrocatalysts toward Oxygen Evolution Reaction." Catalysts 9, no. 5 (May 17, 2019): 459. http://dx.doi.org/10.3390/catal9050459.

Full text
Abstract:
The rational design and development of the low-cost and effective electrocatalysts toward oxygen evolution reaction (OER) are essential in the storage and conversion of clean and renewable energy sources. Herein, a ternary copper-cobalt sulfide nanosheets electrocatalysts (denoted as CuCoS/CC) for electrochemical water oxidation has been synthesized on carbon cloth (CC) via the sulfuration of CuCo-based precursors. The obtained CuCoS/CC reveals excellent electrocatalytic performance toward OER in 1.0 M KOH. It exhibits a particularly low overpotential of 276 mV at current density of 10 mA cm−2, and a small Tafel slope (58 mV decade−1), which is superior to the current commercialized noble-metal electrocatalysts, such as IrO2. Benefiting from the synergistic effect of Cu and Co atoms and sulfidation, electrons transport and ions diffusion are significantly enhanced with the increase of active sites, thus the kinetic process of OER reaction is boosted. Our studies will serve as guidelines in the innovative design of non-noble metal electrocatalysts and their application in electrochemical water splitting
APA, Harvard, Vancouver, ISO, and other styles
39

Neveux, Laure, David Chiche, Delphine Bazer-Bachi, Loïc Favergeon, and Michèle Pijolat. "New insight on the ZnO sulfidation reaction: Evidences for an outward growth process of the ZnS phase." Chemical Engineering Journal 181-182 (February 2012): 508–15. http://dx.doi.org/10.1016/j.cej.2011.09.019.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Ren, Jiatong, Ding Wei, Bojun Tan, and Weitao Yang. "MOF-templated and phase-controlled synthesis of CdS hierarchical nanostructures for visible-light-driven photocatalytic applications." Journal of Physics: Conference Series 2393, no. 1 (December 1, 2022): 012017. http://dx.doi.org/10.1088/1742-6596/2393/1/012017.

Full text
Abstract:
Abstract Developing delicate methods to synthesize well-controlled nanostructures is diffusely recognized as a potent tool to enhance photocatalysts’ performances in various photoreactions. Herein, phase-controlled CdS hierarchical nanostructures were synthesized using a MOF-templated strategy, where Co-MOF nanospheres were used as the starting material, followed by two steps of sulfidation and cation exchange. By rational collocations of the solvent and Cd source in the cation exchange process, cubic CdS hollow hierarchical nanospheres and hexagonal CdS hierarchical nanostructures can be obtained, respectively. Further tests revealed that during the photo-reduction reaction of CO2, the former exhibited high performance in producing H2. At the same time, the latter showed a superior activity and selectivity for CO generation, which embodies the potential of MOF-templated synthesis and selective applications of CdS hierarchical nanostructures with disparate phases.
APA, Harvard, Vancouver, ISO, and other styles
41

Rasyid, Rismawati, Rahmaniah Malik, Heri Septya Kusuma, Achmad Roesyadi, and Mahfud Mahfud. "Triglycerides Hydrocracking Reaction of Nyamplung Oil with Non-sulfided CoMo/γ-Al2O3 Catalysts." Bulletin of Chemical Reaction Engineering & Catalysis 13, no. 2 (June 11, 2018): 196. http://dx.doi.org/10.9767/bcrec.13.2.734.196-203.

Full text
Abstract:
The purpose of this research are to study the temperature influence in hydrocracking process of the nyamplung oil (Calophyllum inophyllum) using a non-sulfided CoMo/γ-Al2O3 catalyst and to develop a simple kinetic model in interpreting the data of hydrocracking products. The experiment was carried out in a pressurized batch reactor operated pressure up 30 bar. The CoMo catalyst supported with γ-Al2O3 was prepared through impregnation method without sulfidation process. The operating temperature varied from 200 to 350 oC. The results show that the non-sulfided CoMo/γ-Al2O3 catalysts, nyamplung oil triglycerides can converted into gasoil and gasoline-like hydrocarbons. The triglyceride hydrocracking reaction of nyamplung oil followed a several stages, i.e., hydrogenation, dehydrogenation, and cracking. Based on the compounds contained in liquid product, hydrocracking reaction was dominated by decarboxylation. The products obtained in hydrocracking process of nyamplung oil are classified to gasoil (C11-C18) and gasoline (C5-C10). The triglycerides hydrocracking reaction of nyamplung oil was assumed by following a series reaction mechanism and a simple kinetic model used for determined the kinetics constants. The highest reaction conversion is 99.10% obtained at temperature of 350 °C for 160 minutes reaction time. Copyright © 2018 BCREC Group. All rights reservedReceived: 20th October 2017; Revised: 8th September 2017; Accepted: 17th September 2017; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Rasyid, R., Malik, R., Kusuma, H.S., Roesyadi, A., Mahfud, M. (2018). Triglycerides Hydrocracking Reaction of Nyamplung Oil with Non-sulfided CoMo/γ-Al2O3 Catalysts. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 196-203 (doi:10.9767/bcrec.13.2.734.196-203)
APA, Harvard, Vancouver, ISO, and other styles
42

Jung, Suk Yong, Jung Je Park, Soo Jea Lee, Hee Kwon Jun, Soo Chool Lee, and Jae Chang Kim. "A study of the sulfidation and regeneration reaction cycles of Zn-Ti-based sorbents with different crystal structures." Korean Journal of Chemical Engineering 27, no. 5 (July 24, 2010): 1428–34. http://dx.doi.org/10.1007/s11814-010-0237-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Qiao, Xianshu, Hongjun Kang, Jinzhu Wu, Yang Li, Qun Wang, Xin Jia, Yadong Qiao, Songtao Lu, Xiaohong Wu, and Wei Qin. "A partial sulfidation approach that significantly enhance the activity of FeCo layered double hydroxide for oxygen evolution reaction." International Journal of Hydrogen Energy 44, no. 60 (December 2019): 31987–94. http://dx.doi.org/10.1016/j.ijhydene.2019.10.082.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Vorobyev, Sergey, Elena Vishnyakova, Maxim Likhatski, Alexander Romanchenko, Ivan Nemtsev, and Yuri Mikhlin. "Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles." Nanomaterials 9, no. 11 (October 26, 2019): 1525. http://dx.doi.org/10.3390/nano9111525.

Full text
Abstract:
Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H2PtCl6 complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl4 solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications.
APA, Harvard, Vancouver, ISO, and other styles
45

Chen, Chih-Jung, and Ray-Kuang Chiang. "Sulfidation of rock-salt-type transition metal oxidenanoparticles as an example of a solid state reaction in colloidal nanoparticles." Dalton Trans. 40, no. 4 (2011): 880–85. http://dx.doi.org/10.1039/c0dt00906g.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Cai, Shichao, Bo Chen, Xiaojiang Qiu, Jiamei Li, Paul G. Tratnyek, and Feng He. "Sulfidation of Zero-Valent Iron by Direct Reaction with Elemental Sulfur in Water: Efficiencies, Mechanism, and Dechlorination of Trichloroethylene." Environmental Science & Technology 55, no. 1 (December 10, 2020): 645–54. http://dx.doi.org/10.1021/acs.est.0c05397.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Wang, Wan-Ni, Wang Dong, Chen-Xi Huang, Bo Liu, Sheng Cheng, and Haisheng Qian. "UCNPs@Zn0.5Cd0.5S Core-Shell and Yolk-Shell Nanostructures: Selective Synthesis, Characterization, and Near-Infrared-Mediated Photocatalytic Reduction of Cr(VI)." Journal of Nanomaterials 2018 (September 13, 2018): 1–9. http://dx.doi.org/10.1155/2018/1293847.

Full text
Abstract:
Constructing near-infrared-light-mediated core-shell nanostructures incorporating upconversion nanoparticles (UCNPs) and semiconductors is of great importance for potential applications in photocatalysis, nano-biomedical engineering, solar cell, etc. In this work, we have demonstrated a two-step solution process to synthesize UCNPs@Zn0.5Cd0.5S core-shell nanoparticles (CSN). Firstly, a layer of AA-Zn(Cd)[OH]4− composites was coated on UCNPs to form UCNPs@AA-Zn(Cd)[OH]4− composites, which has been converted to UCNPs@Zn0.5Cd0.5S CSN via sulfidation reaction process using thioacetamide (TAA) as the sulfur source. Moreover, the UCNPs@Zn0.5Cd0.5S yolk-shell nanoparticles (YSN) have been obtained from the UCNPs@Zn0.5Cd0.5S CSN after calcination at 400°C, which show significantly photocatalytic activity for reduction of Cr(VI) under near-infrared light. All these can be attributed to the enhanced crystallization degree, resulting in enhanced energy transfer efficiency and separation efficiency of the photogenerated electrons and holes. An alternative strategy is provided in this study for fabrication of UCNP/semiconductor composites for various applications.
APA, Harvard, Vancouver, ISO, and other styles
48

Ismail, Roslina, and Iskandar Idris Yaacob. "Synthesis of Ni3Al/ZrO2 Nanocomposite and Study on Its High Temperature Oxidation in Mixed Gas Environment." Materials Science Forum 654-656 (June 2010): 2739–42. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2739.

Full text
Abstract:
Intermetallic nanocomposites of nickel aluminide (Ni3Al) alloy and nanosized zirconia (ZrO2) were fabricated using combined powder metallurgy technique and reaction synthesis. Nanosized zirconia as dispersed phase at 2 and 5 weight percent were pre-mixed with nickel, aluminum powders and other alloying elements in a planetary ball mill for 18 hours at 175 rpm to achieve mechanical alloying effect. The mixture was then compacted using a hydraulic press at 400MPa for 15 minutes. Sintering was done under inert condition (flowing Argon gas) in a tube furnace at 850oC with 3 hours holding time. The saturation magnetization (Ms) values of nickel aluminide nanocomposites containing 2wt% ZrO2 (ICZ2) and 5wt% ZrO2 (ICZ5) were 7.94 and 3.65 emu/g respectively. Reduced elastic modulus (Er) for ICZ5 was lower than ICZ2. Isothermal oxidation/sulfidation test in 1%SO2/air gas mixture at 800 and 1000oC were performed using a thermogravimetric analyzer (TGA) for up to 24 hours duration. The isothermal kinetic results for ICZ2 and ICZ5 are parabolic indicating rate limiting step. Reaction rates increased with increasing temperature. At this low concentration of sulfur, the test specimen only exhibited adsorption of sulfur in the vicinity of the surface region and no sulfide phase was observed.
APA, Harvard, Vancouver, ISO, and other styles
49

Huy, Tran Duc, Nguyen Hong Hai, and Keiichi N. Ishihihara. "Synthesis In Situ Composite TiAl-Based with Particulate Al2O3 Reinforcement by Powder Metallurgy Route." Advanced Materials Research 858 (November 2013): 159–63. http://dx.doi.org/10.4028/www.scientific.net/amr.858.159.

Full text
Abstract:
A major effort has been made over last 20 or so years to introduce TiAl-based alloys into the market-place as engineering component. Recently, titanium aluminide based composites are competitive candidate for aerospace use due to the favorable properties of matrix material, such as low density, high specific strength and relative good properties at elevate temperature [1-4]. The amount of aluminum in titanium alloys exceeds that used in conventional alloys and can range from 10 to 48at%. This concentration of aluminum allows the formation of anin-situalumina reinforcement which is responsible for the excellent oxidation, sulfidation and carburization resistance at temperatures of 1000°C and higher. However, their brittleness and rapid crack growth rate at low to intermediate temperature hinders their application/3/. Nevertheless, nanostructure of monolithic TiAl is unstable at elevate temperatures which deteriorate the high temperature properties. In order to improve the high temperature strength of intermetallic, ceramic particles can be utilized as reinforcements [4, 5]. Recently, in-situ techniques have been utilized to fabricate TiAl-Al2O3composite through displacement reaction between TiO2and Al in planetary ball milling and subsequence heat treatment. The knowledge of reaction characteristic in the Al-TiO2system is great importance to optimize the processing/4, 6/. The chemical compatibility with the iron aluminide matrix at temperature above 1000°C is an important factor for the selection of reinforcements because extreme interfacial reaction during processing results in the degradation of mechanical properties [3, 4].
APA, Harvard, Vancouver, ISO, and other styles
50

Weber, Th, J. C. Muijsers, J. H. M. C. van Wolput, C. P. J. Verhagen, and J. W. Niemantsverdriet. "Basic Reaction Steps in the Sulfidation of Crystalline MoO3to MoS2, As Studied by X-ray Photoelectron and Infrared Emission Spectroscopy." Journal of Physical Chemistry 100, no. 33 (January 1996): 14144–50. http://dx.doi.org/10.1021/jp961204y.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography