Tag: 0-100

Mechanism of germanium doping in sphalerite on copper ion activation: A DFT study was written by Sheng, Jie;Liu, Quanjun;Dong, Jingshen;Subhonqulov, S. H.;Gao, Yalong;Liu, Meilin. And the article was included in Chemical Physics in 2022.Related Products of 20427-59-2 This article mentions the following:

In this study, d. functional theory was used to calculate the activation of Cu ions on germanium-bearing sphalerite (1 1 0) surfaces and the difference in the activation of Cu ions in sphalerite with different Ge concentrations The results show that, with an increase in Ge content, the projected d. of states on the germanium-bearing sphalerite (1 1 0) surface moves toward lower energy, and the energy gap between the Cu 3d and S 3p orbitals on the surface of the germanium-bearing sphalerite becomes larger, and the covalency and bonding strength of the Cu-S bond weaken. Through calculation and anal. of three different Cu activation models, namely Cu substitution, Cu(II) adsorption, and Cu(OH)2 adsorption, it is concluded that an increase in Ge content can hinder the Cu activation of sphalerite and can adversely affect the recovery of sphalerite and the enrichment of valuable elements in the flotation process. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Related Products of 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Related Products of 20427-59-2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Chemical recovery of spent copper powder in laser powder bed fusion was written by Speidel, Alistair;Gargalis, Leonidas;Ye, Jianchao;Matthews, Manyalibo J.;Spierings, Adriaan;Hague, Richard;Clare, Adam T.;Murray, James W.. And the article was included in Additive Manufacturing in 2022.Category: copper-catalyst This article mentions the following:

In laser powder bed fusion (LPBF), recovered unfused powder from the powder bed often degrades upon sequential processing through mechanisms like thermal oxidation and particle satelliting from ejected weld spatters and particle-laser interactions. Given the sensitivity of LPBF performance and build quality to powder properties, spent powder is generally discarded after a few build cycles, especially for materials that are sensitive towards surface oxidation This increases feedstock material costs, as well as costs associated with machine downtime during powder replacement. Here, a new method to chem. reprocess spent LPBF metal powder is demonstrated under ambient conditions, using a heavily oxidized Cu powder feedstock recovered from prior LPBF processing as a model material. This is compared to an equivalent virgin Cu powder. The near-surface powder chem. has been analyzed, and it is shown that surface oxide layers present on spent Cu powder can be effectively reset after rapid reprocessing (from 5 to 20 min). Diffuse reflectance changes on etching, reducing for gas-atomised virgin Cu powder due to the formation of anisotropic etch facets, and increasing for heavily oxidized spent Cu as the highly absorptive oxide layers are removed. The mechanism of powder degradation for moisture sensitive materials like Cu has been correlated to the degradation of LPBF deposits, which manifests as widespread and extensive porosity. This extensive porosity is largely eliminated after reprocessing the spent Cu powder. Chem. etched spent powder is therefore demonstrated as a practical feedstock in LPBF in which track d. produced is comparable to virgin powder. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Category: copper-catalyst).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Category: copper-catalyst

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

CuO with (0 0 1)-plane exposure efficiently induces peroxymonosulfate to form ≃Cu-OOSO^–₃intermediates directly oxidizing organic contaminants in water was written by Zhao, Lele;Zhang, Jiaming;Zhang, Zhiping;Feng, Jing;Wei, Tong;Ren, Yueming;Zhu, Yujun;Ma, Jun. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2022.Safety of Cuprichydroxide This article mentions the following:

Copper (Cu)/peroxymonosulfate (PMS) is a complex coupling system due to its multiple activation pathways with the formation of diverse radical and nonradical species. However, the effects of CuO with different plane exposures on the properties of the coupling system are not clear. In this research, Cu atom-terminated (0 0 1) plane-exposed CuO (CuO-10) is synthesized by a facile hydrothermal method using NH₃·H₂O as the structure directing agent for the first time. CuO-10 has the excellent property of inducing PMS to degrade bisphenol A (BPA) in water, and its reaction rate constant (k) reaches 14 times higher than that of com. CuO with exposed (0 1 0) plane terminated by O atoms (CuO-C). Meanwhile, CuO-10 exhibits a wide pHinitial adaptability, and its BPA degradation exceeds 87% in the pH range of 3-9. Furthermore, compared with CuO-C/PMS, less radical and ₁O₂ are found in CuO-10/PMS oxidation system. Compared to the UV/PMS system, organic contaminants in CuO/PMS systems are easier to oxidize via an oxygen-atom-transfer mechanism. Therefore, the ≃Cu(II)-OOSO^–₃ metastable intermediate is speculated to play an important role in the CuO/PMS activation process, which oxidizes organic contaminants directly through oxygen-atom-transfer and single-electron-transfer pathways. Furthermore, the CuO-10/PMS system is more likely to degrade organic pollutants through the oxygen-atom-transfer pathway than the CuO-C/PMS system. This study not only explores the influence of CuO crystal planes in efficiently inducing PMS activation but also provides new insights into the PMS activation process in the CuO/PMS oxidation system. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Safety of Cuprichydroxide).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Safety of Cuprichydroxide

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

A 3-(2-hydroxyphenyl)imidazo[5, 1-a]isoquinoline as Cu(II) sensor, its Cu(II) complex for selective detection of CN- ion and biological compatibility was written by Mahata, Satyajit;Dey, Souradeep;Mandal, Biman B.;Manivannan, Vadivelu. And the article was included in Journal of Photochemistry and Photobiology, A: Chemistry in 2022.Related Products of 20427-59-2 This article mentions the following:

The heterocyclic probe 3-(2-hydroxyphenyl)imidazo[5, 1-a]isoquinoline (LH) has exhibited specific recognition of Cu²⁺ ion by forming a complex of formula [Cu(L)₂], which in turn showed recognition for CN- ions in CH₃CN/aqueous HEPES-buffer solution (5 mM, pH = 7.4, 6:4, volume/volume). The selective colorimetric and fluorescence response of LH towards Cu²⁺ was achieved over other competing metal ions. Change of color from colorless to yellowish green upon incremental addition of Cu²⁺ into LH solution can be easily observed with naked-eye. Emission intensity of LH was quenched in presence of Cu²⁺ ion due to chelation enhanced quenching (CHEQ) process. From Job′s plot and mass spectral anal. the binding stoichiometry was found to 2:1 between LH and Cu²⁺. Binding of the probe LH with Cu²⁺ ion can be reversed by sequestering Cu²⁺ ion using Na2EDTA solutions Red shift in UV-visible spectrum upon addition of Cu²⁺ ion into LH solution was a consequence of decrease in HOMO-LUMO energy gap. From life time decay curve the average fluorescence life time (τ) was found to be 3.8 ns for free LH whereas in presence of Cu²⁺ τ decreased to 2.4 ns. In addition, so formed [Cu(L)₂] complex was able to detect cyanide ion over other anions through removal of copper from the complex, as insoluble [CuCN]_x. Limit of detection of LH for Cu²⁺ and [Cu(L)2] for CN^– were found to be 0.45 μM and 0.30 μM resp. Detection of Cu²⁺ and CN^– were also performed in environmental real water samples. Based on the cytotoxic anal., 5 μM of LH was selected for determining its fluorescence attributes in cellular imaging in MDA-MB-231 and HDF cells. The cell images showed that intracellular Cu²⁺ and CN^– can be detected using LH and [Cu(L)₂] complex resp. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Related Products of 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, low toxicity and inexpensive. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Related Products of 20427-59-2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Cu₉S₅/Fe₂O₃ nanospheres as advanced negative electrode materials for high performance battery-like hybrid capacitors was written by Luo, Jiaxin;Han, Xuzhao;Ge, Jingmin;Wang, Yiping;Zhao, Xuhui;Zhang, Fazhi;Lei, Xiaodong. And the article was included in ACS Applied Energy Materials in 2022.Electric Literature of CuH2O2 This article mentions the following:

In our work, a Cu₉S₅/Fe₂O₃ composite with nanosphere morphol. is prepared by an efficient one-pot solvothermal selective sulfurization. The structure investigation confirms that there is uneven charge distribution at the interfaces of Cu₉S₅ and Fe₂O₃. Furthermore, the corresponding electrochem. measurements reveal the detailed redox kinetics process about Cu²⁺/Cu⁺, Fe³⁺/Fe²⁺, and (S₂)^–/S^2-. When the obtained Cu₉S₅/Fe₂O₃ composite is used as a neg. electrode, it exhibits a high specific capacity (348.2 mA h g^-1 at 1 A g^-1) with good rate capability. Moreover, a hybrid capacitor (HCP) assembled with Cu₉S₅/Fe₂O₃ as neg. and Ni-Co hydroxide/Cu(OH)₂/CF as pos. electrodes, resp., shows a high energy d. with a corresponding high power d. (64.54 W h kg^-1 at 757.81 W kg^-1) and a high specific capacitance (47 mA h g^-1 at 1 A g^-1) with a capacity retention of 45.68% (21.5 mA h g^-1) even at 20 A g^-1 in a solid-state gel electrolyte. Thus, a facial fabricated anode material with outstanding electrochem. properties for HCPs is provided. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Electric Literature of CuH2O2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Electric Literature of CuH2O2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Ternary Cu(OH)₂/P(g-C₃N₄)/MoS₂ Nanostructures for Photocatalytic Hydrogen Production was written by Vennapoosa, Chandra Shobha;Gonuguntla, Spandana;Sk, Saddam;Abraham, B. Moses;Pal, Ujjwal. And the article was included in ACS Applied Nano Materials in 2022.Safety of Cuprichydroxide This article mentions the following:

We report here the design and synthesis of hybrid ternary heterostructure, Cu(OH)₂/P(g-C₃N₄)/MoS₂, toward efficient visible-light driven hydrogen production through water reduction The proposed hierarchical composite comprising of MoS₂ and Cu(OH)₂ as a cocatalyst is stabilized onto P(g-C₃N₄). The robust hybrid photocatalyst demonstrates remarkable HER activity, superior light harvesting and charge transfer kinetics, resulting in a high hydrogen production rate of 12.01 mmol h^-1 g^-1 and AQY of 19.8%, where the efficiency is enhanced by approx. 40 times compared to the pristine P(g-C₃N₄). Our advanced heterostructure composite design strategies supported by X-ray, XPS, EPR, PL-TCSPC, and electron microscopy with DFT calculations enabled us to correlate the electronic structure with charge transfer kinetics for higher activities and thereby satisfy all the stringent requirements for practical solar-driven hydrogen evolution applications. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Safety of Cuprichydroxide).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Safety of Cuprichydroxide

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Highly efficient Cu-based catalysts for selective hydrogenation of furfural: A key role of copper carbide was written by Yao, Yunlong;Yu, Zhiquan;Lu, Chenyang;Sun, Fanfei;Wang, Yao;Sun, Zhichao;Liu, Yingya;Wang, Anjie. And the article was included in Renewable Energy in 2022.Recommanded Product: Cuprichydroxide This article mentions the following:

Copper catalysts showed excellent C=O hydrogenation selectivity, but poor ability of hydrogen dissociation Herein, a strategy to improve the activity of a Cu-based catalyst is developed by thermal treatment of Cu(OH)₂ at 100°C with C₂H₂/Ar (0.5 vol%) followed by H₂ reduction at 300°C. By means of X-ray diffraction (XRD), transmission electron microscope (TEM), XPS and extended X-ray absorption fine structure (EXAFS), it was revealed that CuxC crystallites, in addition to Cu crystallites, were present in the prepared catalysts. In furfural hydrogenation at 60°C and 1.0 MPa, the CuxC-containing catalyst showed significantly higher activity than the Cu counterpart prepared from the same precursor by H₂ reduction at 300°C. The introduction of ZnO improved the dispersion, and thus led to enhanced catalytic performance. The CuxC-Cu-ZnO catalyst with Zn/Cu molar ratio of 0.5 showed considerably high hydrothermal stability in a 70-h run, with furfural conversion of >99.0% and the furfuryl alc. selectivity of 100%. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Recommanded Product: Cuprichydroxide).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Recommanded Product: Cuprichydroxide

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Using tetramethylammonium hydroxide electrolyte to inhibit corrosion of Mg-based amorphous alloy anodes: A route for promotion energy density of Ni-MH battery was written by Huang, Jianling;Liao, ChengWei;Wang, Hui;Zhao, YuJun;Ouyang, Liuzhang;Liu, Jiangwen;Zhu, Min. And the article was included in Journal of Alloys and Compounds in 2022.Synthetic Route of CuH2O2 This article mentions the following:

Mg-based alloy anodes suffer from severe corrosion in conventional electrolytes (KOH solution) and this substantially obstructs the cycle life, which is a great challenge for using them in the Ni-MH battery. Herein, a high concentration tetramethylammonium hydroxide (TMAH) aqueous electrolyte with a special hydrate structure is explored and enables excellent cycle stability and high capacity for Mg-based alloy anodes. In this electrolyte, the Mg_0.4Ti_0.1Ni_0.5 alloy anode delivers a maximum discharge capacity of 466 mAh g^-1, and maintains 210 mAh g^-1 after 100 cycles owing to the reduced corrosion rate, which are much better than that in 6 M KOH electrolyte, being 425 mAh g^-1 and 69 mAh g^-1, resp. Furthermore, by in-situ forming Cu coating on the Mg_0.4Ti_0.1Ni_0.5 electrode surface during charging process with the adding 0.01 M of Cu(OH)₂ in TMAH electrolyte, the corrosion of the electrode is further suppressed and the reversible capacity can reach 313 mAh g^-1 after 100 cycles. The high conducting Cu coating can also increase the rate capability of the electrode by promoting the charge transfer. Thus, using TMAH electrolytes provides a new approach to promote the electrochem. performances of Ni-MH batteries with Mg-based alloy anodes. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Synthetic Route of CuH2O2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Synthetic Route of CuH2O2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Low-temperature aerobic oxidation of thiophenic sulfides over atomic Mo hosted by cobalt hydroxide sub-nanometer sheets was written by Yang, Huawei;Luo, Mingchuan;Lu, Shiyu;Zhang, Qinghua;Chao, Yuguang;Lv, Fan;Zhu, Lili;Bai, Liangjiu;Yang, Lixia;Wang, Wenxiang;Wei, Donglei;Liang, Ying;Gu, Lin;Chen, Hou;Guo, Shaojun. And the article was included in Chem in 2022.HPLC of Formula: 20427-59-2 This article mentions the following:

Aerobic oxidation desulfurization (AODS) represents a carbon-neutral way to desulfurize petroleum distillates, yet it currently suffers from low efficiency and high temperature for the activation of triplet oxygen. Here, we report a sub-nanometer-thick cobalt hydroxide nanosheet that hosts an at. molybdenum (Mo/Co(OH)₂) catalyst for the efficient aerobic oxidation of thiophenic sulfides. The catalyst achieves a turnover frequency of two orders of magnitude over that of state-of-the-art multi-metallic oxide catalysts and activates the reaction at 60U+00B0C. Coupling detailed characterizations with theor. calculations, we formulate a descriptor-the work function of hosting materials for this reaction, which well explains the host identity dependence of the corresponding catalytic performance. We achieve the complete AODS of real diesel at 80U+00B0C under ambient pressure with negligible decay in consecutive reuses, highlighting the appealing industrial potential of our catalyst. Our findings provide fundamental and technol. insights into implementing high-efficiency catalysts for the carbon-neutral AODS process. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2HPLC of Formula: 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. The copper-mediated C-C, C-O, C-N, and C-S bond formation is a part of one oldest reaction, emphasizing the Ullmann cross-coupling reaction.HPLC of Formula: 20427-59-2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Enthalpy-change driven synthesis of high-entropy perovskite nanoparticles was written by Nie, Siyang;Wu, Liang;Zhao, Lingci;Zhang, Pengfei. And the article was included in Nano Research in 2022.Related Products of 20427-59-2 This article mentions the following:

Due to their diverse and tunable composition, distorted lattice and excellent stability, high-entropy ceramics (HECs) hold great promise for catalysis, especially when they present as nanoparticles (NPs). However, current HECs are typically limited to bulky materials with none or fewer defects, because high synthetic temperature (e.g., 1,000-1,200 °C) is usually required to highlight the entropic contribution (TΔS) in ΔG = ΔH – TΔS. Being different with previous strategies, a neg. Gibbs free energy for HECs crystallization is obtained by dramatically decreasing the mixing enthalpy (ΔH). Guided by this principle, single-phase high-entropy La(Ni_0.2Mn_0.2Cu_0.2Fe_0.2Co_0.2)O_3-δ perovskite (HE-LMO) NPs were prepared at a relatively low temperature (≤ 500 °C). Interestingly, abundant oxygen vacancies were directly created within HE-LMO NPs, which exhibited good activity in catalytic oxidation Meanwhile, the high-entropy structure endows as-made HE-LMO with robust stability even with 5 volume% water in feeding gas. D. functional theory (DFT) calculations revealed that the defective sites in HE-LMO NPs facilitated the charge transfer from HE-LMO to CO, thus activating the adsorbed CO gas. The current work may inspire future design and synthesis of HECs NPs. [graphic not available: see fulltext] In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Related Products of 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. The copper-mediated C-C, C-O, C-N, and C-S bond formation is a part of one oldest reaction, emphasizing the Ullmann cross-coupling reaction.Related Products of 20427-59-2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”