JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2020
·Vol. 326
·期 1
·185-192
·
IF 1.137
Hu Ke,Liu Zhirong,Xiu Taoyuan,Zhou Limin,Wang Yun
The Cu 3 (BTC) 2 (BTC = 1,3,5-benzenetricarboxylic acid) was synthesized by water/solvent heat method. The Cu 3 (BTC) 2 was characterized by SEM/EDS, Zeta potential and XRD. Batch static adsorption experiments investigated the various factors affecting the adsorption of Th(IV) in aqueous solution such as pH, solid–liquid ratio, contact time, initial concentration and temperature, and the adsorption mechanism is also discussed. The adsorption process was in line with the pseudo-second-order kinetic model and the Langmuir isotherm model. At the same time, compared with other adsorbents. The results showed that Cu 3 (BTC) 2 had good adsorption for Th(IV) with a maximum adsorption of 757.58 mg g −1 .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2015
·
IF 4.457
Ting Zhou,Nan Song,Hao Yu,Ying-Wei Yang
A layer of synthetic supramolecular macrocycles, that is, perhydroxyl-pillar[5]arene and perhydroxyl-pillar[6]arene, has been covalently attached to hydrophilic silica supports through Si–O–Si linkages with a coverage of up to 250 μmol pillar[5,6]arenes/g to form novel absorbent hybrid materials. Their adsorption toward a typical herbicide, namely, paraquat, from its aqueous solution has been investigated. Kinetic studies disclosed that paraquat adsorption fits a first-order kinetic model. Equilibrium adsorption data could be explained very well by the Langmuir equation. The pillar[6]arene-modified materials showed more obvious adsorption as compared with pillar[5]arene-modified ones and the saturation adsorption quantity reached about 0.20 mmol of paraquat per gram of materials. The entire process of adsorption was endothermic, and significantly an elevated temperature led to an increase in the adsorption quantity. This new type of pillarene-based adsorbent materials can be considered as a potential adsorbent for harmful substances removal from wastewaters.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 3
·1660-1669
·
IF 1.134
Deng Yu-Ying,Xiao Xin-Feng,Wang Dan,Han Bo,Gao Yu,Xue Jian-Liang
Cu-BTC was synthesised by hydrothermal method in this study to adsorb and remove the toxic heavy metal hexavalent chromium Cr(VI) in water. The EDTA-chitosan/Cu-BTC was prepared by the surface modification of Cu-BTC with EDTA-modified chitosan. The initial concentration effects of adsorbed
chromium solution, adsorbent dosage, adsorption time, adsorption temperature and pH of chromium solution on adsorption capacity were estimated using the single-factor optimisation experiment. Results show that the adsorption capacity of the modified composite was higher than that of Cu-BTC.
Cu-BTC and EDTA-chitosan/Cu-BTC exhibited significant adsorption of Cr(VI) under acidic conditions in water and basically independent of temperature. Their adsorption processes conformed with the pseudo-second-order model. The Langmuir adsorption isotherm model obtained the adsorption isotherm,
which indicated that the adsorption process was single molecule adsorption. Isotherm fitting obtained the maximum adsorption amounts of Cr(VI) for Cu-BTC and EDTA-chitosan/Cu-BTC at 27.32 and 46.51 mg·g-1, respectively. Factor and principal component analyses show that the
main factors affecting the adsorption of Cr(VI) in the EDTA-chitosan/Cu-BTC composites are pH, initial concentration and adsorption time. Therefore, EDTA-chitosan-modified Cu-BTC was a more feasible metal-organic framework material than Cu-BTC because of better adsorption performance, which
can be used for adsorption removal of Cr(VI) in water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
Cong Liu,Ye Li,Xiaoli Wang,Bolin Li,Yuzhi Zhou,Dongbin Liu,Dongxue Liu,Shuang Liu
Antimony has been listed as a critical pollutant in many countries because of its toxic effects on earth organisms. In this study, titanate nanosheets (TNS) were prepared with a high specific surface area by alkaline hydrothermal method. The adsorption mechanism and adsorption capacity of removing Sb(III) from aqueous solutions with TNS as an adsorbent were investigated for the first time. The FTIR and XPS analysis indicated that the interlayer sodium ions of TNS were responsible for Sb(III) adsorption. The batch experiments were conducted on solution pH, adsorbent dosage, initial concentration and reaction time. The results exhibited that when pH was 2, the removal rate was about 90% with the dosage of TNS was 0.1 g/L. The adsorption reaction was exceedingly rapid in the initial 5 min, and then the reaction was in equilibrium after about 30 min. The experimental data were better fitted with Langmuir isotherm model, and the maximum adsorption amount could attain 232.56 mg/g. The experiments showed that TNS had outstanding anti-interference performance to common cations. Therefore, TNS were considered to be an excellent material for removing Sb(III) from aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 17
·12987-12993
·
IF 3.84
Yue Wu,Liguo Li,Wenyan Yang,Shengyu Feng,Hongzhi Liu
A series of hybrid nanoporous polystyrenes were synthesized from commercial polystyrene (PS) and cubic octavinylsilsesquioxane (OVS) via the Friedel–Crafts reaction. The porosity of the resulting hybrid polymers could be fine-tuned by varying the ratio of PS and OVS. The resulting polymers, HCP-1 to HCP-9 had apparent Brunauer–Emmett–Teller surface areas (SBET) in a range of 2.6 to 767 m2 g−1, with total pore volumes in the range of 0.36 to 0.90 cm3 g−1. The SBET was maximum when OVS loading was 9.1 wt%; it then decreased to almost no porosity before increasing again with the increase of OVS loading. The thermal decomposition temperatures of the hybrid polymers were close to pure PS under a N2 atmosphere, but the residues increased with the increase of OVS loading. The gas sorption applications revealed that HCP-3 possessed H2 uptake of 3.01 mmol g−1 (0.60 wt%) at 77 K and 1.01 bar and CO2 uptake of 1.12 mmol g−1 (4.93 wt%) at 298 K and 1.01 bar.
研究领域:
材料科学
·
高分子化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2021
·
IF 4.765
Yuankai Xu,Zhitao Yuan,Qingyou Meng,Xuan Zhao,Yusheng Du
The mixed BHA/NaOL collector was studied to improve the floatability of ilmenite in the presence of lead ions. The mechanism was discussed through surface tension measurements, zeta potential measurements, adsorption amount measurements, and XPS analysis. Microflotation results show that the mixed BHA/NaOL collector exhibited a better performance on the floatability of ilmenite than single BHA and NaOL collector. The recovery of ilmenite was 92.9% when the molar ratio of BHA/NaOL was set to 7:3. The adsorption amount of mixed collectors on the ilmenite surface was greater than that of equivalent single BHA and NaOL. The results of surface tension suggest that there was synergism between BHA and NaOL in aqueous solution. Zeta potential results indicate that mixed BHA/NaOL adsorbed onto ilmenite surface and had a more negative shift than single BHA. XPS results further confirm that BHA and NaOL adsorbed onto the ilmenite surface through chemisorption and hydrogen bonds.
研究领域:
矿物加工
·
表面化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 44
·38430-38436
·
IF 3.289
Changkun Liu,Xiaoyan Liang,Ji'an Liu,Yuying Liu,Jingjing Luo,Hong Zhu
A new type of cotton fiber with double functions of visual detection and efficient adsorption of cadmium (Cd(II)) ions in aqueous solutions was successfully prepared via the surface immobilization of 5,10,15,20-tetrakis(1-methyl-4-pyridinio)porphyrin tetra(p-toluenesulfonate) (TPTP). The prepared multi-functional cotton fibers (denoted as C-TPTP fiber) were able to exhibit efficient capture ability for Cd(II) ions with obvious color changes, which confirmed the sensitive detection capability for Cd(II) in the adsorption process. The pH effect, the adsorption kinetics and isotherms of the C-TPTP fiber were also investigated, together with the corresponding color detections for the Cd(II) adsorption performances. The results showed that the C-TPTP fiber reached adsorption equilibrium within 1 hour with a maximum adsorption capacity of 0.4265 mmol g−1 as determined from the Langmuir isotherm model. The color of the C-TPTP fiber changed from brownish to dark green with the increase of the Cd(II) adsorption capacity. The C-TPTP fiber prepared in this paper shows great potential for the early warning and efficient removal of heavy metal ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Sustainability
·
2023
·
IF 7.8
K. Zhang,L. Zhang,X. Dong,Y. Zhao,F. Li,Q. Cen
In this study, to improve the adsorption performance and recovery of biochar in tetracycline hydrochloride (TCH) adsorption, a new biochar adsorbent, biochar-ceramsite composites (OBCC), were prepared by one-step synthesis using response surface methodology to optimize the preparation conditions. The error between the predicted adsorption capacity and the actual tested adsorption capacity was only 1.9% for the optimal preparation conditions. The maximum adsorption capacity (obtained by the Langmuir model) of TCH onto OBCC (30.72 mg/g) is 1.5 times that of ceramsite (CS, 20.86 mg/g) and 1.9 times that of the raw biochar (RBC, 16.47 mg/g). The better adsorption performance of OBCC can be mainly attributed to its more mesopores distribution (average pore size is 14.58 nm) and larger surface area (1.4 and 4.8 times higher than that of CS and RBC, respectively). The TCH adsorption mechanism by OBCC involves various interactions and mechanisms, including electrostatic interactions , π-π interactions and hydrogen bonding . OBCC is non-toxic, easy to solid-liquid separation, and can be potentially reused for 22 times before completely losing its activity, exhibiting great potential to antibiotic elimination.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 7
·2029-2039
·
IF 4.5
Lou Jie,Fu Qiuping,Yu Lei,Yuan Hui,Zhao Jie,Wei Xinde,Wang Tong,Mo Changli
An environmentally friendly and low-cost chitosan-containing polysaccharide (CP) composite ZIF-8/CP was designed and prepared based on the difficulty of separating the traditional adsorbent from the water phase. ZIF-8/CP was synthesized through in-situ growth approach. The physical, chemical and structure properties of ZIF-8/CP were determined through a series of characterization methods, including SEM, FT-IR and PXRD. The effects of touch time, pH, temperature, and co-existing ions on adsorption were assessed. In addition, kinetics, isotherms of adsorption and thermodynamics were examined. The data of isotherms for adsorption indicated that the adsorption of ZIF-8/CP on MG was similar to the Langmuir model, with a maximum adsorption capacity of 1428.57 mg/g. Moreover, the kinetic parameters were consistent with the pseudo-2nd-order equation. Thermodynamic studies (Δ G < 0, Δ H > 0) demonstrated a heat-absorbing and spontaneous adsorption process. Our study reveals that ZIF-8/CP has good adsorption properties and environmental properties.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhenghui Huang,Peng Hu,Jia Liu,Fang Shen,Youquan Zhang,Kungang Chai,Yunpan Ying,Chengjun Kang,Zhaoqiang Zhang,Hongbing Ji
Efficient CH 4 /N 2 separation is necessitated for obtaining purified methane from natural gas. Aluminum-based metal–organic frameworks (Al-MOFs) have potential for industrial separation applications due to their structure-tunable, low-cost, and scalable features. Intrigued by the impressive selectivity of a recently reported Al-MOF (Al-CDC) toward CH 4 over N 2 , we herein further study the potential of Al-MOFs as adsorbent for CH 4 /N 2 separation, mainly considering the effects of pore geometry and linker polarity. Utilization of two bent ligands and two linear ligands with different polarity afforded two one-dimensional square-shaped Al-MOFs i.e., CAU-10-H, MIL-160, and two rhombic-shaped counterparts i.e., Al-Fumarate (Al-Fum), MIL-53(Al)), respectively. Afterward, pure CH 4 and N 2 adsorption experiments were conducted at 273–313 K for assessing the CH 4 /N 2 separation performance. The results indicated that all the Al-MOFs exhibited superior affinity toward CH 4 over N 2 , and the CH 4 uptake followed the sequence of Al-Fum > CAU-10-H > MIL-53(Al) > MIL-160. Exhilaratingly, Al-Fum exhibited unprecedented CH 4 /N 2 selectivity (17.2) and high CH 4 uptake at 273 K and 1.0 bar. The mechanism underlying the disparity of Al-MOFs affinity toward CH 4 was deciphered via theoretical simulation, suggesting that the synergetic effects of accessibility of strong affinity sites (μ 2 -OH) on AlO 6 chains and polar pore surface induced by varying linkers highly promoted the CH 4 uptake. Furthermore, the results of cyclic adsorption–desorption experiments and binary breakthrough tests validated the feasibility of Al-Fum for practical application.
研究领域:
材料科学
·
化学工程
·
气体分离
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Hongyan Yao,Na Zhang,Kunzhi Shen,Ningning Song,Kaixiang Shi,Shiyang Zhu,Yunhe Zhang,Shaowei Guan
A dianhydride monomer 2, 5-bis(3, 4-dicarboxyphenoxy)-4′-phenylethynyl biphenyl (PEPHQDA) containing a chain extendable phenylethynyl pendant group has been successfully synthesized via successive nucleophilic substitution , Sonogashira cross-coupling, hydrolysis and dehydration reactions. A flexible microporous polyimide network has been prepared based on the use of triamine (TAPOB), affording hyperbranched polyimide, followed by the curing of phenylethynyl groups to give network structure. Specifically microporous features such as a well-defined surface morphology , microporous structure and nanometer-sized pore channels have been introduced to the flexible polyimide networks through this two-step pathway. This network exhibit a BET surface area (322 m 2 g −1 ) as well as a comparable CO 2 uptake (1.25 mmol g −1 at 273 K and 1 bar) and enthalpy of adsorption (30.3 kJ mol −1 ) to that of other microporous polyimides derived from rigid tridimensional monomers.
研究领域:
高分子科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yangmei Qin,Zeyi Xiao,Shizhao Jian,Yuyang Wang,Senqing Fan,Yinan Wang,Boya Qiu,Jingyun Liu,Zexue Wang,Qidong Wan
It is challenging to fabricate stable, complete, controllable, homogeneous metal–organic framework composites. Hereof, we suggested a versatile method where nanocrystals were assembled inside the porous polymer by synergistic chemical synthesis and permeation flow in and through its pores. The poly(tetrafluoroethylene) (PTFE)/ZnO and PTFE/ZIF-8 were fabricated as the prototype of the composites. For fabricating the composite, ZnO was first synthesized inside the pores followed by ligand vapor treatment. The even and well-distributed ZnO nanorods of 10–30 nm were synthesized inside pores of PTFE and converted into ZIF-8. The ZnO and ZIF-8 were quantified in 281 and 431 mg g–1 against the original PTFE, respectively. The composite is stable and the nanocrystals are not readily washed away. The adsorption uptake (C3 > C2 > C1) of the light hydrocarbon gases for the PTFE/ZIF-8 nanocomposite were preliminarily evaluated. The adsorption selectivities were calculated, where the selectivities for C2H6/CH4 and C3H8/CH4 were 10.9 and 42.8, respectively.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）