scholarly journals Effect of a Sulfur Precursor on the Hydrothermal Synthesis of Cu2MnSnS4

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3457
Author(s):  
Edyta Waluś ◽  
Maciej Manecki ◽  
Grzegorz Cios ◽  
Tomasz Tokarski
Keyword(s):  
Hydrothermal Synthesis ◽  
Ethylene Glycol ◽  
Product Structure ◽  
Crystalline Material ◽  
Tetragonal Structure ◽  
Sulfur Source ◽  
Structure And Microstructure

Cu2MnSnS4 (CMTS) is acknowledged as an alternative to traditional semiconductors. The structure and microstructure of synthetic CMTS depend on, among other things, the types of sulfur sources used. Traditionally obtained CMTS mostly has a tetragonal structure. In this study, the effect of using thiourea (Tu) or Na2S as a sulfur source on the product structure was compared using hydrothermal synthesis at 190 °C for 7 days (ethylene glycol with water in the presence of poly(vinylpyrollidone) was used as a solvent). When Tu was used, CMTS precipitated in the form of concentric microspheres, 1–1.5 µm in size, consisting of hexagonal (in the cores) and tetragonal (the rims) forms. Most probably, the rapidly formed hexagonal nucleus was later surrounded by a slower-forming rim with a tetragonal structure. In contrast, when Na2S was used as a precursor, microspheres were not formed and a fine crystalline material with a homogeneous tetragonal structure was obtained. This allowed for the choice of micromorphology and product structure during synthesis.

scholarly journals Hydrothermal synthesis of flower-like molybdenum disulfide microspheres and their application in electrochemical supercapacitors

RSC Advances ◽  
2018 ◽  
Vol 8 (68) ◽  
pp. 38945-38954 ◽  
Author(s):  
Fangping Wang ◽  
Guifang Li ◽  
Jinfeng Zheng ◽  
Jing Ma ◽  
Caixia Yang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Molybdenum Disulfide ◽  
Three Dimensional ◽  
Ammonium Molybdate ◽  
Sulfur Source ◽  
Electrochemical Supercapacitors

Three-dimensional flower-like molybdenum disulfide microspheres composed of nanosheets were prepared by a hydrothermal method using ammonium molybdate as the molybdenum source and thiourea as the sulfur source.

Uniform Hematite Hexagonal Nanodisks with Dominant (001) Facets: Hydrothermal Synthesis and Catalytic Performance for the Decomposition of Ammonium Perchlorate

2014 ◽  
Vol 651-653 ◽  
pp. 161-164
Author(s):  
Shun Hong Shi ◽  
Gang Xu
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Ethylene Glycol ◽  
Ammonium Perchlorate ◽  
Hydrothermal System ◽  
Equilibrium Condition ◽  
Catalytic Performance ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Hydrothermal Route

Uniform hematite (α-Fe2O3) hexagonal nanodisks with dominant (001) facets have been synthesized via hydrothermal route assisted with ethylene glycol (EG). XRD, SEM, TEM, HRTEM and SAED were employed to characterize the synthesized samples. The results show that the moderate addition of EG in the hydrothermal system creates an equilibrium condition for the crystal nucleation and growth, resulting in the uniform α-Fe2O3hexagonal nanodisks with dominant (001) facets. Due to the exposition of the special facets of (001) and (110), the α-Fe2O3nanodisks express superior catalytic activity for the decomposition of ammonium perchlorate (AP).

One-Step Hydrothermal Synthesis of MoS2 Nano-Flowers with High Surface Area and Crystalline

2012 ◽  
Vol 531-532 ◽  
pp. 508-511 ◽  
Author(s):  
Yan Juan Li ◽  
Nan Li ◽  
Xiao Yan ◽  
Yue Chi ◽  
Qing Yuan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
Surface Area ◽  
Ph Value ◽  
High Surface ◽  
High Surface Area ◽  
Ammonium Molybdate ◽  
Molar Ratio ◽  
Sulfur Source ◽  
One Step

One-step and controlled pH hydrothermal synthesis of transition metal disulfide using double molybdenum sources to synthesize MoS2 nano-flowers at low temperature was first reported. Anhydrous molybdenum pentachloride (MoCl5) and four sulfur ammonium molybdate ((NH4) 6Mo7O24•4H2O) were the molybdenum source and CS (NH2) 2 was the sulfur source. Through hydrothermal method, MoS2 was obtained at 180 °C. The pH value of system was controlled by adjusting the molar ratio of MoCl5 and (NH4) 6Mo7O24•4H2O. The products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), surface area (BET) and transmission electron microscopy (TEM). The results show that the products were hexagonal MoS2 with a high crystalline and flower-like structure consisted of small particles. The thickness of petals is a few to tens of nanometers. By changing the molar ratio of molybdenum sources, the resultant phase from the mixed phase transited to the pure phase and the purity of synthetic MoS2 crystal increaseed.

Hydrothermal synthesis of MoO3 nanobelts utilizing poly(ethylene glycol)

2008 ◽  
Vol 183 (1) ◽  
pp. 330-333 ◽  
Author(s):  
Ch.V. Subba Reddy ◽  
Edwin H. Walker ◽  
Chen Wen ◽  
Sun-il Mho
Keyword(s):  
Hydrothermal Synthesis ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Hydrothermal Synthesis of Polyhedral Nickel Sulfide by Dual Sulfur Source for Highly-Efficient Hydrogen Evolution Catalysis

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2115
Author(s):  
Yuan Gao ◽  
Ka Wang ◽  
Zixia Lin ◽  
Haizeng Song ◽  
Xiaomeng Duan ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrogen Evolution ◽  
Industrial Development ◽  
Nickel Sulfide ◽  
Synthesis Method ◽  
Sulfur Source ◽  
Performance Change ◽  
Highly Efficient ◽  
Hydrogen Evolution Reactions ◽  
Nonprecious Metal

Transition metal sulfides are cheap and efficient catalysts for water splitting to produce hydrogen; these compounds have attracted wide attention. Nickel sulfide (NiS2) has been studied in depth because of its simple preparation process, excellent performance and good stability. Here, we propose a modification to the hydrothermal synthesis method for the fabrication of a highly efficient and stable NiS2 electrocatalyst prepared by two different sulfur sources, i.e., sulfur powder and C3H7NaO3S2 (MPS), for application in hydrogen evolution reactions. The obtained NiS2 demonstrated excellent HER performance with an overpotential of 131 mV to drive -10 mA cm−1 in 0.5 M H2SO4 solution with 5mV performance change after 1000 cycles of stability testing. We believe that this discovery will promote the industrial development of nonprecious metal catalysts.

Hydrothermal Synthesis of Litchi‐like SrTiO3 with the Help of Ethylene Glycol

2018 ◽  
Author(s):  
Wei Zhao ◽  
Hugang Wang ◽  
Nianqi Liu ◽  
Jiacheng Rong ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Ethylene Glycol

scholarly journals Solvent Thermal Method to control Lead Sulfide Nano/Micron Crystal and Its Ni/PbS Composites

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Yajia Ding ◽  
Bing Bai ◽  
Jianan Peng
Keyword(s):  
Acetic Acid ◽  
Ethylene Glycol ◽  
Lead Sulfide ◽  
Thermal Method ◽  
Sulfur Source ◽  
Light Emitting ◽  
Display Devices ◽  
Light Emitting Devices ◽  
Wide Range ◽  
Lead Source

Lead sulfide (PbS) is an important IV-VI semiconductor material with narrow bandwidth and wide wave width, which attracts people's attention. Nano-level PbS has many novel optoelectronic properties and has a wide range of applications in the field of optoelectronics, such as infrared optoelectronic devices, photovoltaic devices, light-emitting devices and display devices. In this paper, Pbs is produced by solvent thermal method by using lead acetate as lead source, sulfur power as sulfur source, ethylene glycol as solvent, and acetic acid to provide acidic environment. The reaction acidity, type of lead source, amount of sulfur source and other aspects will be explored. The products obtained under different conditions were characterized by X-ray diffraction (XRD), optical microscopy and scanning electron microscopy (SEM). The results showed that PbS produced at 140°C for 24 hours, using 14mL ethylene glycol and 1.2mL acetic acid has the best morphology. It has a non-planar six-arm symmetrical structure. Finally, we prepare the lead sulfide composite Ni/PbS, and characterized it.

Effects of excess sulfur source on the formation and photocatalytic properties of flower-like MoS2 spheres by hydrothermal synthesis

2015 ◽  
Vol 144 ◽  
pp. 153-156 ◽  
Author(s):  
Beibei Sheng ◽  
Jinsong Liu ◽  
Ziquan Li ◽  
Menghui Wang ◽  
Kongjun Zhu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Photocatalytic Properties ◽  
Sulfur Source ◽  
Excess Sulfur
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