Month: February 2023

Electrocatalytic Upcycling of Nitrate Wastewater into an Ammonia Fertilizer via an Electrified Membrane was written by Gao, Jianan;Shi, Ning;Li, Yifan;Jiang, Bo;Marhaba, Taha;Zhang, Wen. And the article was included in Environmental Science & Technology in 2022.Recommanded Product: Cuprichydroxide This article mentions the following:

Electrochem. upcycling wastewater N such as nitrate (NO₃^–) and nitrite (NO₂^–) into an NH₃ fertilizer is a promising yet challenging research topic in resource recovery and wastewater treatment. This study presents an electrified membrane made of a CuO@Cu foam and a polytetrafluoroethylene (PTFE) membrane for reducing NO₃^– to NH₃ (NH₃) and upcycling NH₃ into (NH₄)₂SO₄, a liquid fertilizer for ready-use. A paired electrolysis process without external acid/base consumption was achieved under a partial c.d. of 63.8 ± 4.4 mA cm^-2 on the cathodic membrane, which removed 99.9% NO₃^– in the feed (150 mM NO₃^–) after a 5 h operation with an NH₃ recovery rate of 99.5%. A recovery rate and energy consumption of 3100 ± 91 g-(NH₄)₂SO₄·m^-2·d^-1 and 21.8 ± 3.8 kWh kg^-1-(NH₄)₂SO₄, resp., almost outcompete the industrial NH₃ production cost in the Haber-Bosch process. D. functional theory (DFT) calculations unraveled that the in situ electrochem. conversion of Cu²⁺ into Cu¹⁺ provides highly dynamic active species for NO₃^– reduction to NH₃. This electrified membrane process was demonstrated to achieve synergistic nitrate decontamination and nutrient recovery with durable catalytic activity and stability. 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. 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.Recommanded Product: Cuprichydroxide

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

Efficient conversion of low-concentration nitrate sources into ammonia on a Ru-dispersed Cu nanowire electrocatalyst was written by Chen, Feng-Yang;Wu, Zhen-Yu;Gupta, Srishti;Rivera, Daniel J.;Lambeets, Sten V.;Pecaut, Stephanie;Kim, Jung Yoon Timothy;Zhu, Peng;Finfrock, Y. Zou;Meira, Debora Motta;King, Graham;Gao, Guanhui;Xu, Wenqian;Cullen, David A.;Zhou, Hua;Han, Yimo;Perea, Daniel E.;Muhich, Christopher L.;Wang, Haotian. And the article was included in Nature Nanotechnology in 2022.Formula: CuH2O2 This article mentions the following:

Electrochem. converting nitrate ions, a widely distributed nitrogen source in industrial wastewater and polluted groundwater, into ammonia represents a sustainable route for both wastewater treatment and ammonia generation. However, it is currently hindered by low catalytic activities, especially under low nitrate concentrations Here we report a high-performance Ru-dispersed Cu nanowire catalyst that delivers an industrial-relevant nitrate reduction current of 1 A cm^-2 while maintaining a high NH₃ Faradaic efficiency of 93%. More importantly, this high nitrate-reduction catalytic activity enables over a 99% nitrate conversion into ammonia, from an industrial wastewater level of 2,000 ppm to a drinkable water level <50 ppm, while still maintaining an over 90% Faradaic efficiency. Coupling the nitrate reduction effluent stream with an air stripping process, we successfully obtained high purity solid NH₄Cl and liquid NH₃ solution products, which suggests a practical approach to convert wastewater nitrate into valuable ammonia products. D. functional theory calculations reveal that the highly dispersed Ru atoms provide active nitrate reduction sites and the surrounding Cu sites can suppress the main side reaction, the hydrogen evolution reaction. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Formula: 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. These ligands enable the reaction promoted in mild condition. The reaction scope has also been greatly expanded, rendering this copper-based cross-coupling attractive for both academia and industry. Formula: CuH2O2

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

Reutilization of waste biomass from sugarcane bagasse and orange peel to obtain carbon foams: Applications in the metal ions removal was written by Licona-Aguilar, A. I.;Torres-Huerta, A. M.;Dominguez-Crespo, M. A.;Palma-Ramirez, D.;Conde-Barajas, E.;Negrete-Rodriguez, M. X. L.;Rodriguez-Salazar, A. E.;Garcia-Zaleta, D. S.. And the article was included in Science of the Total Environment in 2022.Reference of 20427-59-2 This article mentions the following:

The high levels of heavy metals contained in residual water and the pollution generated by a large amount of unexploited agro-industrial waste are a serious problem for the environment and mankind. Therefore, in the present work, with the aim of treating and reducing the pollution caused by heavy metal ions (Pb, Cd, Zn and Cu), activated carbons (ACs) were synthesized from sugarcane bagasse (SCB) and orange peel (OP) by means of phys. – chem. activation method in an acid medium (H₃PO₄, 85 wt%) followed by an activation at high temperature (500 and 700°C). Thereafter, these materials were used to produce carbon foams (CF) by the replica method and to evaluate their adsorbent capacity for the removal of heavy metals from synthetic water. XRD, FTIR, DLS, BET, Zeta Potential (ζ), SEM-EDS and AAS were used to investigate their structures, surface area, pore size, morphol., and adsorption capacity. The results show that as-prepared CF have a second level mesoporous structure and AC present a micro-mesoporous structure with a pore diameter between 3 and 4 nm. The exptl. adsorption capacities of heavy metals showed that the CF from OP present a better elimination of heavy metals compared to the AC; exhibiting a removal capacity of 95.2 ± 3.96% (Pb) and 94.7 ± 4.88% (Cu) at pH = 5. The adsorption values showed that the optimal parameters to reach a high metal removal are pH values above 5. In the best of cases, the min. remaining concentration of lead and copper were 2.4 and 2.6 mg L^-1, resp. The exptl. data for carbon adsorbents are in accordance with the Langmuir and BET isotherms, with R² = 0.99 and the maximum homogenous biosorption capacity for lead and copper was Q_max = 968.72 and 754.14 mg g^-1, resp. This study showed that agro-industrial wastes can be effectively retrieved to produce adsorbents materials for wastewater treatment applications. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Reference of 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Reference of 20427-59-2

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

Study on dissolution behavior of CuO nanoparticles in various synthetic media and natural aqueous medium was written by Yadav, Praveen Kumar;Kochar, Chinky;Taneja, Lakhan;Tripathy, Sushree Swarupa. And the article was included in Journal of Nanoparticle Research in 2022.HPLC of Formula: 20427-59-2 This article mentions the following:

Due to the wide applicability of copper-based nanoparticles (CBNPs), their long-term utilization could raise the toxicol. concerns owing to their potential persistence, accumulation, and relatively low soluble nature. The present study is focused on the dissolution behavior of com. procured CuO nanoparticles (NPs) in natural surface water system (pond water) and DI water at environmental concentration (1 mg/L) of CuO NPs. The dissolution of CuO NPs in DI water was higher than the pond water. Maximum dissolved Cu concentration in DI water and pond water was 0.054 and 0.035 mg/L, resp. However, the dissolution kinetics followed reverse trend. High rate of dissolution (i.e., 0.049 h^-1) observed in pond water, whereas the dissolution rate was low in DI water (i.e., 0.034 h^-1). The trend of dissolution in presence of humic acid was 10 mg/L > 100 mg/L > 1 mg/L. Addnl., the dissolution of CuO NPs increased with increasing the IS (i.e., KH₂PO₄ > CaCl₂ > NaCl) and decreasing the pH (i.e., pH 9 < pH 7 < pH 5.7) of suspension. The speciation modeling using a Visual MINTEQ software showed the presence of various species of Cu in pond water such as Cu-DOC (80%), Cu²⁺ (4%), CuCO₃ (aq) (9%), CuOH⁺ (6%), and Cu(OH)₂ (aq) (1%). The exptl. half-life of CuO NPs varied from 2.4 to 36 h in different mediums which confirms the persistence nature of CuO NPs in natural water system. 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. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.HPLC of Formula: 20427-59-2

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

Effect of various metal-based halloysite nanotubes for the catalytic degradation of chitosan to low molecular weight chitosan was written by Tan, T.-W.;Abu Bakar, N. H. H.;Abu Bakar, M.. And the article was included in Materials Today Communications in 2022.Reference of 20427-59-2 This article mentions the following:

This article describes the application of metal-based supported halloysite nanotube (HNT-M²⁺, M²⁺ = Ni²⁺ or Cu²⁺) catalysts as an alternative route for the degradation of chitosan (CS) into low mol. weight chitosan (LMWC). Results from SEM coupled with energy dispersive X-ray spectrometry (SEM/EDX) anal. reveals the surface morphol. of the HNT-M²⁺ catalysts with certain amount of agglomeration, which may suggest the incorporation of the metal species into the HNT support. XPS further clarifies that Ni(OH)₂ or Cu(OH)₂ and CuO exist as active species in the catalysts. X-ray diffraction (XRD) spectra reveal the presence of a low intensity Cu(OH)₂ peak in the HNT-Cu²⁺ catalyst. The absence of other Cu²⁺ species in the HNT-Cu²⁺ catalysts is due to the peak overlap with HNT. The diffractogram of HNT-Ni²⁺ also shows only HNT peaks. The pH at zero point charge (pHzpc) of the HNT-M²⁺ catalysts at 3.8, which is slightly lower than the reaction mixture pH (∼3.9), enhances the degradation of CS due to electrostatic attraction between the catalyst surface and CS. The crystallinity index (CrI), viscosity, [η] and viscosity average mol. weight, Mv of LMWC were lower than those of CS due to the chain scission of the polymer backbone and loss of crystallinity, thus accounting for their high water solubility The results revealed that the HNT-Cu²⁺ catalyst exhibited a better catalytic performance than HNT-Ni²⁺ for the degradation of CS. This is probably due to the different active species available on HNT-Cu²⁺. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Reference of 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Reference of 20427-59-2

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

Silica-nanoparticle reinforced lubricant-infused copper substrates with enhanced lubricant retention for maintenance-free heat exchangers was written by Ryu, Min;Choi, Hyoungwoo;Yoon, Jongsun;Choi, Yun-Nam;Lee, Sukyoung;Kim, Hyeongjeong;Chae, Minji;Lee, Jeong Wook;Kang, Jinkyu;Lee, Hyomin. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2023.HPLC of Formula: 20427-59-2 This article mentions the following:

Copper substrates are widely used in heat exchangers due to their low cost and high thermal conductivity While copper substrates have been modified to exhibit non-wetting property via lubricant infusion to enhance condensation heat transfer efficiency, these engineered surfaces often lack chem. robustness and lubricant retention, limiting their long-term use without maintenance. In this work, we present a new strategy in which omniphobic and chem. inert fluorocarbon oil is infused into a nanostructured copper substrate reinforced with silica nanoparticles (SiNP) to achieve enhanced durability and acid-resistive properties. We demonstrate that the assembly of SiNP layer prior to lubricant infusion serves as a phys. barrier and provides addnl. anchoring points for the lubricant to retain via capillary force. Moreover, we show that SiNP-reinforced liquid-infused surface (LIS) exhibits excellent non-wetting and self-cleaning properties, leading to enhanced stability against acid exposure as well as dust, oil, and microbial contamination. Based on the excellent long-term stability in heat transfer performance even under harsh environmental challenges, we envision that the SiNP-reinforced LIS presented in this work will provide new insight in the design of robust and maintenance-free lubricant-infused surfaces for energy and environmental applications. 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. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. HPLC of Formula: 20427-59-2

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

One-step fabrication of Cu₂O-Cu catalytic electrodes with regular porous array by ultra-fast laser scanning was written by Li, Chaojiang;Liu, Shenggui;Jin, Xin;Zuo, Zhen;Yang, Huan;Jing, Hao;Cao, Xun. And the article was included in Journal of Alloys and Compounds in 2022.Product Details of 20427-59-2 This article mentions the following:

Highly efficient oxygen evolution reaction (OER) electrocatalysts have been well developed over the past decades, but their large-scale preparation with good performance-to-cost ratio remains a critical challenge. Here we report a simple one-step fabrication method of catalytic electrode using ultra-fast laser scanning. SEM results demonstrate that the samples have a regular porous array microstructure; XRD shows that Cu₂O was formed on the surface of Cu substrate, which is in agreement with the large amount of Cu⁺ detected from XPS. The as-prepared Cu₂O-Cu catalyst exhibits excellent OER activity in 1 M NaOH with an over-potential of 384 mV at the c.d. of 10 mA cm^-2 (without iR compensation). During this process, thin Cu(OH)₂ passivation layer could be formed with weak crystallinity, which could be easily removed by reduction reactions using cyclic voltammetry and it has min. side effect on the OER performance of the sample. This approach is ultra-fast, simple, and environmentally friendly, and thus holds great potential in large-scale practical applications of electrocatalysts. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Product Details of 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Product Details of 20427-59-2

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

A versatile nanocomposite made of Cd/Cu, chlorophyll and PVA matrix utilized for photocatalytic degradation of the hazardous chemicals and pathogens for wastewater treatment was written by Soltaninejad, Vahhab;Ahghari, Mohammad Reza;Taheri-Ledari, Reza;Maleki, Ali;Shalan, Ahmed Esmail. And the article was included in Journal of Molecular Structure in 2022.Name: Cuprichydroxide This article mentions the following:

In this work, a novel composition of cadmium sulfide (CdS), copper(II) hydroxide (Cu(OH)₂), copper(II) oxide nanoparticles, and chlorophyll (Chl) is prepared based on polyvinyl alc. (PVA) matrix. The characterization of the CdS/Cu(OH)₂/CuO@PVA-Chl nanocomposite has been carried out by the various anal. methods. Then, the prepared CdS/Cu(OH)₂/CuO@PVA-Chl is then applied as a very efficient photocatalyst for degradation of the hazardous dyes such as methylene blue (MB), Congo red (CR), and 4-chlorophenol (4-CP) in the aqueous samples. For the preparation of the intended nanocomposite, the Chl has been extracted from fresh spinach via a convenient mech. adsorption/desorption method. In the obtained optimum conditions, a great degradation efficiency (ca. 97.6%) for the MB dye achieved by simultaneous application of the prepared CdS/Cu(OH)₂/CuO@PVA-Chl photocatalyst and the visible-light (LED 70 W, λ = 425 nm), over a 60 min contact time. Moreover, the degradation efficiency of the CR and 4-CP dyes were ca. 92% and 88%, resp. The reusability investigations have revealed that no significant loss in the catalytic performance is occurred over seven times recycles. As well, degradation of the pathogens by the CdS/Cu(OH)₂/CuO@PVA-Chl nanocomposite has been screened under the obtained optimal conditions. Briefly, the diameter of the inhibition zones by the prepared composite film has been evaluated to be ca. 11.0 (± 0.1) and 9.0 (± 0.1) mm for S. aureus and E. coli bacterial cells, resp. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Name: 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. Name: Cuprichydroxide

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

Synthesis, tailoring the optical properties of insulating alkaline-earth metal oxide (MgO) with dopants of transition metal (Cu) and vibrating sample magnetometer measurements was written by Raza, Syed Masood;Uddin, Zaheer;Tahir, Adeel;Raza, S. M.. And the article was included in Solid State Communications in 2022.Product Details of 20427-59-2 This article mentions the following:

X-ray diffraction studies on MgO with copper dopants show the solubility limit of copper up to 3% preferably with f.c.c. (fcc.) structures. With doped of copper exceeding 3% in MgO. XRD showed phase changes with dopants of copper at 5% and exceeding 5% in MgO. Composites of two different crystalline phases are expected to appear (may be f.c.c cubic and f.c. triclinic). This confirmed to the fact that substitution or replacement of magnesium ions with copper ions would result into composite structures. Secondary phase appeared with exceeding 3% copper doping in MgO in the form of CuO as spherical nanoparticles and the same could be for MgO as spherical nanoparticles. EDX confirmed this behavior for copper dopants in MgO. With UV-visible absorption spectra, the quantum confinement effect is attributed to defects produced with dopants of copper ions as interstials in MgO within a limit of one to three percent. The observed size of MgO with SEM is 90.85 nm and the band gap is 4.68eV which are indicative of the transitions from insulating to dielec. behavior or to topol. insulator.Exptl. results of a.c. magnetic susceptibility with VSM on magnesium oxide and varying dopants of copper in MgO even with composite structures and phase changes show an antiferromagnetic behavior. This antiferromagnetic behavior is a manifestation of ′topol. insulator′ with enhanced dielectricity. Spin fluctuations due to nonlinear spin dynamics, triggered gyroscopic behavior in the nanomaterials, thereby producing quasiparticles of electrons and holes (vacant quantum states of electrons) as Majorana Fermions. Step transitions with upward and downward peaks of magnetization in MgO, with 3% copper ions concentrations and MgO with 8% copper ions concentration show ′skyrmion like′ excitations with decreasing trends due to phase changes and composite structures but accompanied with neg. slopes thereby maintaining ′antiferromagnetic behavior′ as manifestations of topol. insulators. Other samples of MgO with 1%, 5% and 10% copper ions concentrations showed antiferromagnetic behavior. With proper selection of copper dopants in MgO, various kinks of ′spin fluctuations′ as manifestations of magnetic excitations can be produced to making these materials useful for diverse categories of devices. Math. result is proposed for eigenfunctions (shape profiles) and energy eigenvalues by considering the quasiparticles of energy fields for electrons and holes as Majorana Fermions with twisting and twigging in a braided configuration with QED behavior. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Product Details 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, inexpensive and low toxicity. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Product Details of 20427-59-2

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