Journal of Nanoelectronics and Optoelectronics
·
2020
·Vol. 15
·期 2
·219-225
·
IF 0.771
Wang Zhe,Li Wenyao,Zhang Kenan,Jiang Haishun,Ji Tao,Li Jiaojiao,Liu Jingjing,Han Weihua
The global abuse of antibiotics has led to many environment problems such as water pollution and drug-resistant bacteria. In this study, pure natural loofah was used as raw material to form powdered loofah activated carbon (LAC) after high temperature carbonization annealing, and sodium
alginate (SA) with gel ability was combined to prepare loofah activated carbon sodium alginate (LAC-SA) hydrogel sphere by external emulsification method. This work showed that the adsorption mechanisms of LAC-SA microspheres for the three antibiotics of ofloxacin (OFO), tetracycline (TC)
and norfloxacin (NFO) were in line by the psedosecond-order and the formula of Langmuir. The ofloxacin (OFO) antibiotic solution was used as a sample for cyclic adsorption experiment for 10 times and the cumulative adsorption amount exceeded 700 mg g–1.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.9
Huaheng Wang,Xinmin Liu,Qingrui Zhang,Qingjie Guo
Metal–organic cages (MOCs), a novel type of porous material, have shown great potential in the adsorption and separation of CO 2 gas. Zirconium-based metal–organic cages (Zr-MOCs) have garnered special attention because of their outstanding stability and high solubility. Nevertheless, due to its powdery nature and the tendency for easy aggregation, its application in the industrial field is limited. Here, drawing inspiration from water treatment, the inexpensive and stable ionic exchange resin D001 was employed as the supporting material for loading Zr-MOCs, and D001-Zr-MOC was prepared. The adsorption capacity of D001-Zr-MOC for CO 2 from the mixed gas (15% CO 2 /85% N 2 ) under diverse loads of Zr-MOCs, various temperatures, and different gas flow rates was investigated, and its cyclic adsorption performance for CO 2 was determined. The adsorption mechanism of CO 2 on D001-Zr-MOC was probed by means of adsorption energy, adsorption isotherm, adsorption heat, and diffusion coefficient. The results showed that the maximum CO 2 adsorption capacity of D001-Zr-MOC was 3.96 mmol/g. The adsorption capacity decreased by merely 4.62% after 10 adsorption/desorption cycles. The adsorption energy and adsorption heat of D001-Zr-MOC for CO 2 molecules are relatively high, which indicates that D001-Zr-MOC has good adsorption capacity and selectivity for CO 2 molecules. The adsorption of CO 2 is regarded as a typical Langmuir monolayer adsorption, and it is verified that a chemical reaction occurred between CO 2 and the adsorbent. CO 2 possesses a higher diffusion coefficient, and the excellent cyclic adsorption capacity of D001-Zr-MOC is verified.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Chengcheng Yang,Kangbo Yang,Hongshan Guo,Huajun Sun,Nan Xiang,Chuanxing Wang
ABSTRACT Although some progress had been made in the adsorption of graphene aerogels, more research was needed on their elasticity and recyclability. In this paper, a superhydrophobic fluorinated cellulose and graphene composite aerogel (FCGA) was prepared by a simple two-step impregnation method. Firstly, nano-cellulose was introduced into the graphene aerogel to inhibit the excessive accumulation of graphene lamellae and increase the specific surface area. The surface of the composite aerogel was then impregnated with silanol and fluorinated functional groups by a two-step impregnation method, resulting in a superhydrophobic aerogel with remarkable elasticity. The introduction of cellulose and silane provided the aerogel with excellent elasticity and recovery from cyclic adsorption. The successful grafting of the fluorophobic groups of PFDMS onto the graphene oxide strengthened the framework of the graphene aerogel, making FCGA a good candidate for repeated selective oil absorption. It could be restored to the original height after compression to 50% and 80% strain decompression. FCGA could efficiently absorb oil in water and had a high organic adsorption capacity. And the adsorption capacity of different oils/organic solvents reached 22480 mg/g∼36700 mg/g. Its absorption efficiency remained above 98.5% under distillation cycles. Due to its high elasticity, it retained more than 90% of its cyclic adsorption capacity through the squeeze cycle. As a simple, low-cost recovery method, its reusability was already better than most known adsorption elastic materials. The prepared composite aerogel had the advantages of simple preparation, low density (0.014g/cm 3 ), superhydrophobicity (water contact angle 153.3°), excellent adsorption properties, and recyclability. Therefore, FCGA had a very promising application in circulating selective oil absorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Yameng Wang,Zi-Yu Liu,Yubei Su,Yu Liu,Aoqun Liu,Xiaoye Zhang,Yugang Huang,Liyun Zhang,Haisheng Chen,Wancheng Zhu
In light of the burgeoning energy technology sector and the ever-growing demand for lithium across diverse industrial domains, conventional lithium extraction methods have been proven inadequate due to their limited production capacity and high operational costs. This work introduces a novel approach to the manganese-titanium based composite HMTO (Mn:Ti=1:4) lithium ion-sieve (LIS) nanospheres, employing lithium acetate dihydrate, manganese carbonate and titanium dioxide P25 as the primary materials. These nanospheres exhibit relatively uniform spherical morphology, narrow size distribution, small average particle size ( ca. 55 nm), large specific surface area (43.58 m 2 g −1 ) and high surface O 2− content (59.01%). When utilized as the adsorbents for Li + ions, the HMTO (Mn:Ti=1:4) LIS demonstrates a fast adsorption rate, approaching equilibrium within 6.0 h with an equilibrium adsorption capacity ( q e ) of 79.5 mg g −1 and a maximum adsorption capacity ( q m ) of 87.26 mg g −1 (initial concentration C 0 : 1.8 g L −1 ). In addition, the HMTO (Mn:Ti=1:4) also delivers a high lithium extraction from the simulated high magnesium-lithium molar ratio salt lake brine (Mg:Li=103), achieving a q e of 33.85 mg g −1 along with a remarkable selectivity ( α Mg Li = 2192.76 ). Particularly, the HMTO (Mn:Ti=1:4) LIS showcases a satisfactory recycling adsorption performance. The adsorption capacity remains at a high level, even that determined after the 5 th cycle (55.45 mg g −1 ) surpasses that of the most recently reported adsorbents. Ultimately, the fantastic synergistic lithium adsorption mechanism is deliberately uncovered by leveraging the ion exchange principles and molecular dynamics (MD) simulations.
研究领域:
材料科学
·
能源技术
·
化学工程
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Zeguang Yin,Ke Wang,Pengfei Zhao,Xiaoli Tang
The water hydration and subsequent calcination (denoted as hydration–calcination) technique was used to modify the microstructure of lithium orthosilicate (Li4SiO4) prepared by solid-state reactions. The original and modified Li4SiO4 sorbents were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption, scanning electron microscopy, and thermogravimetric analysis. The cyclic capacity of these sorbents was further examined using a dual fixed-bed reactor. After treatment by water hydration, most of the Li4SiO4 transformed into LiOH and Li2SiO3. Moreover, following subsequent calcination, the sample exhibited a looser structure with a smaller particle size compared with the original Li4SiO4. This favorable structure was responsible for improved CO2 chemisorption properties, as measured by a higher capacity, faster absorption kinetics, and improved stability.
研究领域:
材料科学
·
无机化学
·
能源化学
·
环境化学
·
吸附分离技术
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 6
·505
·
IF 4.4
Qi Zhang,Jian Zhang,Jian Shi,Ruilu Yang
Three Fe3O4magnetic solvent-free nanofluids with different amine-based coronal layer structures are synthesized and characterized by using magnetic Fe3O4as the core, silane coupling agent as the corona, and polyether amines with different graft densities and chain lengths as the canopy. The concentration of heavy metal ions after adsorption is measured by atomic absorption spectrometry (AAS) to study the effect of Fe3O4magnetic solvent-free nanofluids on the adsorption performance of the heavy metal ions lead (Pb(II)) and copper (Cu(II)) in water. The adsorption of Fe3O4magnetic solvent-free nanofluid was explored by changing external condition factors such as adsorption contact time and pH. Additionally, the adsorption model is established. The magnetic solvent-free nanofluid is separated from water by applying an external magnetic field to the system, and desorption and cyclic adsorption tests are carried out. Based on the adsorption mechanism, the structure design of Fe3O4magnetic solvent-free nanofluid was optimized to achieve optimal adsorption performance.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）