scholarly journals Nanostructural Materials for Energy Storage Systems

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Bronislaw Buczek
Keyword(s):  
Air Conditioning ◽  
Storage Systems ◽  
Specific Area ◽  
Nitrogen Adsorption ◽  
Microporous Structure ◽  
High Adsorption ◽  
Cooling Systems ◽  
Heat Of Wetting ◽  
High Adsorption Capacity ◽  
Adsorption Desorption

The aim of this study was to assess of carbonaceous monoliths used for adsorption cooling systems. The carbonaceous monoliths prepared from coal precursors are obtained. The porous structure of monoliths was evaluated on the basis of nitrogen adsorption-desorption data. The investigated monoliths have significantly developed microporous structure. The large specific area of carbonaceous monoliths (about 2000 m2/g) and volume of micropores are observed. Methanol adsorption isotherms and heat of wetting using methanol was determined. Results show that monoliths materials are high adsorption capacity of methanol and heat of wetting, which can improve of heat exchange and efficiency in processes of refrigeration and air conditioning.

scholarly journals Magnetically Functionalized Moss Biomass as Biosorbent for Efficient Co2+ Ions and Thioflavin T Removal

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3619 ◽  
Author(s):  
Martin Pipíška ◽  
Simona Zarodňanská ◽  
Miroslav Horník ◽  
Libor Ďuriška ◽  
Marián Holub ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Adsorption Properties ◽  
Thioflavin T ◽  
Oxide Nanoparticles ◽  
High Adsorption ◽  
Efficient Removal ◽  
High Adsorption Capacity ◽  
Rapid Kinetics ◽  
Adsorption Desorption ◽  
Rhytidiadelphus Squarrosus

Microwave synthesized iron oxide nanoparticles and microparticles were used to prepare a magnetically responsive biosorbent from Rhytidiadelphus squarrosus moss for the rapid and efficient removal of Co2+ ions and thioflavin T (TT). The biocomposite was extensively characterized using Fourier transformed infrared (FTIR), XRD, SEM, and EDX techniques. The magnetic biocomposite showed very good adsorption properties toward Co2+ ions and TT e.g., rapid kinetics, high adsorption capacity (218 μmol g−1 for Co and 483 μmol g−1 for TT), fast magnetic separation, and good reusability in four successive adsorption–desorption cycles. Besides the electrostatic attraction between the oxygen functional moieties of the biomass surface and both Co2+ and TT ions, synergistic interaction with the –FeOH groups of iron oxides also participates in adsorption. The obtained results indicate that the magnetically responsive biocomposite can be a suitable, easily separable, and recyclable biosorbent for water purification.

scholarly journals In-situ synthesis of poly(m-phenylenediamine) on chitin bead for Cr(VI) removal

2020 ◽  
Author(s):  
Jinyu Wei ◽  
Huayu Hu ◽  
Yanjuan Zhang ◽  
Zuqiang Huang ◽  
Xingtang Liang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
In Situ Polymerization ◽  
High Adsorption ◽  
Adsorption Temperature ◽  
Monolayer Adsorption ◽  
Ft Ir ◽  
High Adsorption Capacity ◽  
User Friendly ◽  
Adsorption Desorption

Abstract In this work, a user-friendly chitin-based adsorbent (CT-PmPD) was synthesized by in-situ polymerization of m-phenylenediamine on chitin bead, which could effectively remove Cr(VI) from water. The structure and morphology of the CT-PmPD were characterized by FT-IR, XRD, SEM, zeta potential and XPS. Specifically, the effect of adsorbed dosage, pH, contact time, adsorption temperature and coexisting salt on the adsorption of Cr(VI) were studied. Besides, the adsorption mechanism of CT-PmPD toward Cr(VI) were also analyzed. Consequenlty, CT-PmPD exhibited a monolayer adsorption and the Langmuir model fitted a Cr(VI) adsorption capacity reaching 185.4 mg/g at 298 K. The high adsorption capacity was attributed to the abundant amino groups of CT-PmPD, which could be protonated to boost the electrostatic attraction of Cr(VI) oxyanions, thus providing electron to reduce Cr(VI). Additionally, the CT-PmPD revealed a good regeneration and reusability capacity, maintaining most of its adsorption capacity even after five cycles of adsorption-desorption. This high adsorption capacity and excellent regeneration performance highlighted the great potential of CT-PmPD for the removal of Cr(VI).

Mussel-inspired synthesis of polydopamine-functionalized calcium carbonate as reusable adsorbents for heavy metal ions

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47848-47852 ◽  
Author(s):  
Chengyong Li ◽  
Zhong-ji Qian ◽  
Chunxia Zhou ◽  
Weiming Su ◽  
Pengzhi Hong ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Calcium Carbonate ◽  
Chemical Modification ◽  
Heavy Metal Ions ◽  
High Efficiency ◽  
Low Cost ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Adsorption Desorption ◽  
Multiple Adsorption

A new high-efficiency adsorbent (PDA-CaCO3) is fabricated via simple thermal calcination ostracean shells and chemical modification with dopamine. It can be easily regenerated by low-cost reagents, and exhibited high adsorption capacity after multiple adsorption–desorption cycles.

Novel CO2 Capturer Derived from SBA-15 Monolith Coated with Amine

2011 ◽  
Vol 287-290 ◽  
pp. 3081-3084
Author(s):  
Kun Kun Han ◽  
Yu Zhou ◽  
Jing Jia Wen ◽  
Jian Hua Zhu
Keyword(s):  
Adsorption Capacity ◽  
Potential Application ◽  
High Adsorption ◽  
Sem And Tem ◽  
New Strategy ◽  
High Adsorption Capacity ◽  
Cyclic Adsorption ◽  
Adsorption Desorption

A new strategy of preparing the efficient CO2 adsorbent without further molding is reported in this article. This novel shaped CO2 capturer is obtained by coating amine on the SBA-15 monolith with a specific 3D net-linked morphology that favors the accessibility of amine guest in the channel. The resulting composites are characterized with XRD, N2 adsorption, SEM and TEM techniques, and their adsorptive ability is assessed with CO2-TPD test, offering a high adsorption capacity of 144 mg g-1and stable cyclic adsorption-desorption performance for potential application.

scholarly journals Adsorption Properties of Native and Modified Forms of the Clay Mineral Saponite

1997 ◽  
Vol 15 (1) ◽  
pp. 39-46 ◽  
Author(s):  
N.K. Shonija ◽  
A.L. Detistova
Keyword(s):  
Structural Characteristics ◽  
Surface Characteristics ◽  
Adsorption Properties ◽  
Dye Molecules ◽  
High Adsorption ◽  
Acid Modification ◽  
High Adsorption Capacity ◽  
Desorption Isotherms ◽  
Adsorption Desorption ◽  
Modified Forms

Studies have been made of the surface characteristics of the schistose silicate, saponite, and samples obtained by acid modification of the mineral. The structural characteristics of the samples were determined via the complete adsorption/desorption isotherms of benzene. It was shown that acid modification of saponite generates materials with improved adsorption–structural characteristics and high adsorption capacity towards small non-polar molecules. By mans of the ionogenic adsorption of dye molecules, electro-osmotic data and DTA, it has been shown that saponite could be used for the creation of effective ion-exchange materials.

scholarly journals Preparation of sorbents from selected polymers

2011 ◽  
Vol 13 (1) ◽  
pp. 51-54 ◽  
Author(s):  
Wiesława Ciesińska ◽  
Grzegorz Makomaski ◽  
Janusz Zieliński ◽  
Tatiana Brzozowska
Keyword(s):  
Potassium Hydroxide ◽  
Ethylene Terephthalate ◽  
Phenol Formaldehyde ◽  
Specific Area ◽  
Nitrogen Adsorption ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Microporous Structure ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Preparation of sorbents from selected polymers In this work, the results of studies on the preparation of sorbents from selected polymers were presented. The polymers were carbonized and subsequently physically activated by steam or carbon dioxide, or alternatively, chemically activated with potassium hydroxide. For the obtained materials, a specific area was evaluated by means of low-temperature nitrogen adsorption and benzene adsorption, iodine number was also determined. The obtained results indicated a possibility to procure hydrophobic sorbents of microporous structure. Sorbents having the best properties, i.e. the specific area of above 2000 m2/g were produced from poly(ethylene terephthalate) and phenol-formaldehyde resin.

Mercury Removal from Wastewater by Steamed Hoof Powder

1999 ◽  
Vol 40 (7) ◽  
pp. 109-116 ◽  
Author(s):  
M. H. Ansari ◽  
A. M. Deshkar ◽  
P. S. Kelkar ◽  
D. M. Dharmadhikari ◽  
M. Z. Hasan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Light Metal ◽  
Mercury Removal ◽  
High Adsorption ◽  
Surface Sites ◽  
Ph Values ◽  
High Adsorption Capacity

Steamed Hoof Powder (SHP), size < 53μ, was observed to have high adsorption capacity for Hg(II) with >95% removal from a solution containing 100 mg/L of Hg(II) with only 0.1% (W/V) concentration of SHP. The SHP has good settling properties and gives clear and odour free effluent. Studies indicate that pH values between 2 and 10 have no effect on the adsorption of Hg(II) on SHP. Light metal ions like Na+, K+, Ca2+ and Mg2+ up to concentrations of 500 mg/L and heavy metals like Cu2+, Zn2+, Cd2+, Co2+, Pb2+, Ni2+, Mn2+, Cr3+, Cr6+, Fe2+ and Fe3+ up to concentrations of 100 mg/L do not interfere with the adsorption process. Anions like sulphate, acetate and phosphate up to concentrations of 200 mg/L do not interfere. Chloride interferes in the adsorption process when Hg(II) concentration is above 9.7 mg/L. The adsorption equilibrium was established within two hours. Studies indicate that adsorption occurs on the surface sites of the adsorbent.

scholarly journals Pore Modification and Phosphorus Doping Effect on Phosphoric Acid-Activated Fe-N-C for Alkaline Oxygen Reduction Reaction

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1519
Author(s):  
Jong Gyeong Kim ◽  
Sunghoon Han ◽  
Chanho Pak
Keyword(s):  
Phosphoric Acid ◽  
Photoelectron Spectroscopy ◽  
Structural Changes ◽  
Electronic States ◽  
Nitrogen Adsorption ◽  
Reduction Reaction ◽  
Phosphorus Doping ◽  
X Ray ◽  
Precious Metal Catalysts ◽  
Adsorption Desorption

The price and scarcity of platinum has driven up the demand for non-precious metal catalysts such as Fe-N-C. In this study, the effects of phosphoric acid (PA) activation and phosphorus doping were investigated using Fe-N-C catalysts prepared using SBA-15 as a sacrificial template. The physical and structural changes caused by the addition of PA were analyzed by nitrogen adsorption/desorption and X-ray diffraction. Analysis of the electronic states of Fe, N, and P were conducted by X-ray photoelectron spectroscopy. The amount and size of micropores varied depending on the PA content, with changes in pore structure observed using 0.066 g of PA. The electronic states of Fe and N did not change significantly after treatment with PA, and P was mainly found in states bonded to oxygen or carbon. When 0.135 g of PA was introduced per 1 g of silica, a catalytic activity which was increased slightly by 10 mV at −3 mA/cm2 was observed. A change in Fe-N-C stability was also observed through the introduction of PA.

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