Realizing ultra-stable Ti3C2-MXene in aqueous solution via surface graft with ionomers

Soft Matter ◽  
2021 ◽  
Author(s):  
Yue Ding ◽  
Shanglin Xiang ◽  
Weiqiang Zhi ◽  
Sai Gong ◽  
Gaolin He ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
2D Materials ◽  
Metallic Conductivity ◽  
Surface Graft

MXene is the first class of 2D materials with the combination of metallic conductivity and hydrophilicity. However, degradation forms a key drawback limiting their long term application. This work for...

scholarly journals Long-Term Stability of Different Kinds of Gas Nanobubbles in Deionized and Salt Water

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1808
Author(s):  
Yali Zhou ◽  
Zhenyao Han ◽  
Chunlin He ◽  
Qin Feng ◽  
Kaituo Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Bubble Size ◽  
Ostwald Ripening ◽  
Salt Water ◽  
Dlvo Theory ◽  
Deionized Water ◽  
Hydrodynamic Cavitation ◽  
Term Stability ◽  
Long Term Stability

Nanobubbles have many potential applications depending on their types. The long-term stability of different gas nanobubbles is necessary to be studied considering their applications. In the present study, five kinds of nanobubbles (N2, O2, Ar + 8%H2, air and CO2) in deionized water and a salt aqueous solution were prepared by the hydrodynamic cavitation method. The mean size and zeta potential of the nanobubbles were measured by a light scattering system, while the pH and Eh of the nanobubble suspensions were measured as a function of time. The nanobubble stability was predicted and discussed by the total potential energies between two bubbles by the extended Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. The nanobubbles, except CO2, in deionized water showed a long-term stability for 60 days, while they were not stable in the 1 mM (milli mol/L) salt aqueous solution. During the 60 days, the bubble size gradually increased and decreased in deionized water. This size change was discussed by the Ostwald ripening effect coupled with the bubble interaction evaluated by the extended DLVO theory. On the other hand, CO2 nanobubbles in deionized water were not stable and disappeared after 5 days, while the CO2 nanobubbles in 1 mM of NaCl and CaCl2 aqueous solution became stable for 2 weeks. The floating and disappearing phenomena of nanobubbles were estimated and discussed by calculating the relationship between the terminal velocity of the floating bubble and bubble size.

scholarly journals Designing organic solvent separation membranes: Polymers, porous structures, 2D materials, and their combinations

2021 ◽  
Author(s):  
Ameya Manoj Tandel ◽  
Wenji Guo ◽  
Kelly Bye ◽  
Liang Huang ◽  
Michele Galizia ◽  
...  
Keyword(s):  
Organic Solvent ◽  
High Selectivity ◽  
2D Materials ◽  
Porous Structures ◽  
Membrane Materials ◽  
Term Stability ◽  
Long Term Stability ◽  
Separation Membranes ◽  
Tremendous Progress

As interest for membrane-based organic solvent separation increases, membrane materials exhibiting high permeance, high selectivity, and long-term stability against solvents are sought. Membrane technology has experienced tremendous progress by integrating...

Dissolution Characteristics and Morphology of Large-sized Scorodite Particles Synthesized from Fe(II) and As(V) in Aqueous Solution

2012 ◽  
Vol 31 (4-5) ◽  
pp. 451-458 ◽  
Author(s):  
S. Fujieda ◽  
K. Shinoda ◽  
T. Inanaga ◽  
M. Abumiya ◽  
S. Suzuki
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Surface Defects ◽  
Atmospheric Temperature ◽  
Orthorhombic Structure ◽  
X Ray ◽  
Long Term Storage ◽  
Transmission Electron ◽  
Term Storage

AbstractA novel process for preparing scorodite particles with a diameter of approximately 20 µm from Fe(II) and As(V) in aqueous solution has been developed by DOWA Metals and Mining. In the present study, the dissolution characteristics of iron and arsenic from the scorodite particles synthesized by this process have been investigated under different conditions. The results show that the concentration of arsenic dissolved from the particles in aqueous solution is very low, but it has a complicated dependence on the temperature and pH of the solution. Transmission electron microscopy (TEM) with an energy dispersive X-ray spectrometer (EDS) was used to analyze the morphology, structure, and composition of the scorodite particles. The results indicate that the scorodite particles exhibit a nearly octahedral shape with planes composed of almost (111) planes in the orthorhombic structure. The concentration of iron at the surface of the particles is higher than that of iron inside of the particles. This characteristic morphology, along with the minimal surface defects of the scorodite particles, is considered to be responsible for the low dissolution of arsenic from the particles in aqueous solution. Atmospheric temperature and solution conditions were also found to be important for the safe, long-term storage of arsenic using scorodite particles.

Long-term stabilization of recombinant human interferon α 2b in aqueous solution without serum albumin

2003 ◽  
Vol 264 (1-2) ◽  
pp. 57-72 ◽  
Author(s):  
Llamil Ruiz ◽  
Nuria Reyes ◽  
Ladys Duany ◽  
Abrisleyda Franco ◽  
Kethia Aroche ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Serum Albumin ◽  
Human Interferon ◽  
Interferon Α ◽  
Human Interferon Α

Dissolution of spent nuclear fuel fragments at high alkaline conditions under H2 overpressure

MRS Advances ◽  
2016 ◽  
Vol 1 (62) ◽  
pp. 4163-4168
Author(s):  
E. González-Robles ◽  
M. Herm ◽  
V. Montoya ◽  
N. Müller ◽  
B. Kienzler ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Partial Pressure ◽  
Nuclear Fuel ◽  
Alkaline Solution ◽  
Spent Nuclear Fuel ◽  
Dissolution Tests ◽  
The Matrix ◽  
Alkaline Conditions ◽  
Long Term Behavior

ABSTRACTThe long-term behavior of the UO2 fuel matrix under conditions of the Belgian “Supercontainer design” was investigated by dissolution tests of high burn-up spent nuclear fuel (SNF) in high alkaline solution under 40 bar of (Ar + 8%H2) atmosphere. Four fragments of SNF, obtained from a pellet previously leached during two years, were exposed to young cement water with Ca (YCWCa) under 3.2 bar H2 partial pressure in four single/independent autoclave experiments for a period of 59, 182, 252 and 341 days, respectively. After a decrease of the concentration of dissolved 238U, which is associated with a reduction of U(VI) to U(IV), the concentration of 238U in solution is constant in the experiments running for 252 and 341 days. These observations indicate an inhibition of the matrix dissolution due to the presence of H2. A slight increase in the concentration of 90Sr and 137Cs in the aqueous solution indicates that there is still dissolution of the grain boundaries. These findings are similar to those reported for spent nuclear fuel corrosion in synthetic near neutral pH solutions.

Accelerating hole extraction by inserting 2D Ti3C2-MXene interlayer to all inorganic perovskite solar cells with long-term stability

2019 ◽  
Vol 7 (36) ◽  
pp. 20597-20603 ◽  
Author(s):  
Taotao Chen ◽  
Guoqing Tong ◽  
Enze Xu ◽  
Huan Li ◽  
Pengcheng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Storage ◽  
Work Function ◽  
Perovskite Solar Cells ◽  
Potential Candidate ◽  
Inorganic Perovskite ◽  
Metallic Conductivity ◽  
Term Stability ◽  
Long Term Stability

MXenes have been demonstrated as a potential candidate in the field of photovoltaics and energy storage owing to their high transmittance, metallic conductivity and tunable work function.

scholarly journals THE USING OF NEW PRESERVING SOLUTION FOR THE STORAGE AND THE DEMONSTRATION OF ANATOMICAL PREPARATIONS

2019 ◽  
Vol 27 (4) ◽  
pp. 61-64
Author(s):  
V. N. Nikolenko ◽  
A. L. Urakov ◽  
L. I. Rastegaeva ◽  
E. A. Kozyreva ◽  
L. A. Gridin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Russian Patent ◽  
Upper Respiratory Tract ◽  
Museum Exhibits ◽  
Long Term Storage ◽  
Shape Structure ◽  
Mucous Membranes ◽  
Upper Respiratory ◽  
Term Storage

For storage and open demonstration of moist anatomical educational preparations and museum exhibits proposed to use a new preservative, which is an aqueous solution of 0.014-0.019% 3-iodine-2-propinilbutilcarbonate. The solution has high antiseptic activity and does not have a local irritant effect on the skin, mucous membranes of the upper respiratory tract and oral cavity, as well as on the conjunctiva of the eyes. The proposed preservative is non-toxic and environmentally safety. Long-term storage and use of anatomical preparations in the proposed preservative does not cause any damaging changes, violations of their shape, structure and color. The method is patented by the Russian Patent Agency.

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