CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Shanshan Tong,Hongxia Deng,Lin Wang,Tao Huang,Shuhui Liu,Jinyi Wang
Molybdenum disulfide-based 2D nanomaterials have become an attractive target for investigations in various fields. However, their potential application in the important area of environmental science has not yet been effectively explored. In this work, ultrathin molybdenum disulfide nanosheets decorated with cerium oxide nanoparticles (MoS 2 /CeO 2 ) nanohybrids were synthesized using a two-step hydrothermal reaction and used to remove Pb 2+ as a representative heavy metal ion. A detailed characterization, including transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectrum, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA), confirmed the formation of the MoS 2 /CeO 2 nanohybrids. Furthermore, different factors affecting the sorption process, such as pH, adsorbent amount, contact time, ion strength, and reusability, were studied in detail. The adsorption kinetic data were described well with the pseudo-second-order model, and the equilibrium data were fitted well to Langmuir isotherms. The as-prepared nanohybrids exhibited a high uptake ability (333 mg g −1 at pH 2.0) and excellent reusability. More importantly, hybrid materials showed preferential Pb 2+ uptake behaviour compared to other heavy metal ions such as Cd 2+ (3.24 mg g −1 ), Cu 2+ (5.3 mg g −1 ), Zn 2+ (3 mg g −1 ), Co 2+ (1.8 mg g −1 ), Ni 2+ (1.3 mg g −1 ), Mn 2+ (2.1 mg g −1 ), and Cr 3+ (1.76 mg g −1 ). The adsorption mechanism may be attributed to the intrinsically sulfur-rich characteristic, the strong soft-soft interactions between S atoms and Pb atoms, the interlayer spacing capture, and weak ion-exchange interaction. These findings open the possibility of expanding the applications of transition metal dichalcogenide-based materials in the environmental sciences.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Shuo Liu,Jianwen Wang,Yu-e Shi,Yongqing Zhai,Yun-kai Lv,Peng Zhang,Zhenguang Wang
Sulfur quantum dots (S-dots) show great potential for applications in various field, due to their favorable biocompatibility, high stability, and antibacterial properties. However, the use of S-dots in chemical sensing is limited by the lack of functional groups on the surface. In this work, a fluorescence glutathione (GSH) assay is developed based on the GSH modulated quenching effect of Cu 2 O nanoparticles (NP) on S-dots. The fluorescence of S-dots is effectively quenched after forming complex with Cu 2 O NP through a static quenching effect (SQE). Introducing of GSH can trigger the decomposition of Cu 2 O NP into GSH-Cu(I) complex, which leads to the weaken of SQE and the partial recover of the fluorescence. The intensity of recovered fluorescence shows a positive correlation with the concentration of GSH in the concentration range of 20 to 500 μM. The fluorescence GSH assay shows excellent selectivity and robustness towards various interferences and high concentration salt, which endow the successful detection of GSH in human blood sample. The presented results provide a new door for the design of fluorescence assays, which also provides a platform for the applications in nanomedicine and environmental science.
研究领域:
分析化学
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纳米技术
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生物化学
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材料科学
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医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Duy-Nam Phan,Thi Ngat Tran,Phuong-Linh Nguyen,Minh Thang Le,Azeem Ullah,Ick-Soo Kim
Cu-doping contents in the TiO2 lattice structure were studied to show the effects on the crystal structure, morphology, and photocatalytic activity of TiO2 nanoparticles and thus composite cellulosic nanofibrous membranes. Pristine and copper-doped TiO2 nanoparticles were synthesized using the sol–gel technique, a wet chemical method with the advantages of low synthesizing temperature, uniform nanosize distribution, and purity. The as-synthesized semiconductor nanoparticles were first tested with the dye removal process and then impregnated onto electrospun cellulose nanofibers (CL nanofibers) to acquire modified nanofibers with self-cleaning properties. The as-prepared composite CL nanofibers consisting of doped and undoped TiO2 nanoparticles were characterized by various techniques, such as field emission scanning electron microscopy, transmission electron microscopy, UV–vis, X-ray diffraction, Fourier transform infrared spectroscopy, and tensile tests. The copper-doped TiO2 molar ratio in the nanocomposite was found to possess a pronounced impact on the dye removal and self-cleaning effects under the visible light spectrum, whereas TiO2 is highly effective under specific UV-light irradiation. Optical measurements and dye decomposition showed that the Cu-doped TiO2 nanocomposite was optimized at a 1% molar ratio by the copper-doping concentration regarding dye removal and self-cleaning applications under the visible light range.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Ze Qiu,Wencai Cheng,Xiyang He,Jing Yan,Hao Lan,Congcong Ding,Xiaoyan Shu,Dong Wu,Xirui Lu
Uranium-containing silica gel (UCSG) is a secondary waste generated during the advanced treatment of nuclear wastewater. In order to reduce the growing storage pressure for UCSG, from the perspective of building a borosilicate glass network, UCSG was used to replace SiO2 in the glass-cured formula to directly achieve the immobilization of UCSG. SEM-EDS results showed that uranium was uniformly distributed in the matrix, and the maximum solid solubility of UCSG (two components: silica gel and uranyl ions) in the formula was as high as 55 wt %. At the same time, TG-MS proved that silica gel lost OH groups (down about 4.61 wt %) and formed Si-O-Si bond by condensation. FT-IR and XPS proved a change in the number of Si-O-Si bond, and new Si-O-B and Si-O-Al bond appeared on the spectrum. This was evidence that silica gel could self-involved participate in the construction of glass networks. EPR analysis obtained the changes in the coordination environment of U atom, the U atom decreased spin electrons number in the glass than in uranyl crystals. The glass also has good physical properties (hardness: 6.51 ± 0.23 GPa; density: 2.3977 ± 0.0056 g/cm3) and chemical durability (normalized leaching rate: LRU = 2.34 × 10–4 ± 2.05 × 10–6 g·m2·days–1 after 42 days), this research provided tactics for simple treatment of uranium-containing silica gel in one step.
研究领域:
材料科学
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核废物处理
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Fengbin Liu,Han Wang,Maolin Liu,Zehui Lu,Zhenpei Lin,Ying Chen
Currently, the problem of air pollution is getting more and more serious, especially the pollution of tiny solid particles (PM, particulate matter) in the air, which poses a great challenge to the environment and human health. Therefore, it is particularly important to develop air filtration materials with high filtration efficiency and low resistance to meet this challenge. In this study, we propose to prepare air filtration membranes by centrifugal jet electrospinning technology, design multifactorial orthogonal coupling experiments, and investigate the effects of key process parameters of centrifugal jet electrostatic spinning, including solution concentration, airflow rate, rotational speed, and voltage, on the fiber diameter and uniformity by applying the polar analysis of variance and analysis of variance. PAN-BaTiO 3 electret nanofiber filtration membranes with high efficiency and low resistance were prepared by combining the optimized process of centrifugal blowing electrospinning. Various characterization methods (tensile test, water contact angle test, surface charge test, filtration test) were used to evaluate the effect of different BaTiO 3 electret contents (0%, 0.1%, 0.5%, 1%) on the comprehensive performance of the filtration membranes, and the electret filtration efficiency of the electret filtration membranes prepared by the present process reached as high as 96.56% with a pressure drop of 29 Pa.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yunxiao Ban,Zhijie Wan,Cong Ma,Yuzhen Wu,Haoran Chen
This study proposes a magnetic levitation fixed bed flocculation reactor as an effective method for the removal of Cr (VI). The research examines the effects of both single and dual polymer flocculants on the efficiency of the flocculation process. Initially, a magnetic levitation layer was established using a radial magnetic field in conjunction with stainless steel balls. Subsequently, polyaluminum chloride (PAC) and a non-ionic coagulant, polyacrylamide (NPAM), were introduced into the water to create a magnetic levitation fixed bed flocculation reactor. This reactor with the objective of purifying water contaminated with simulated Cr (VI). The results indicate that the incorporation of a reducing agent, specifically FeSO 4 , in conjunction with PAC and NPAM respectively, can achieve Cr (VI) removal rates exceeding 97% and turbidity removal rates exceeding 96%. The interaction between the cross-flow influent and the flocculating particles promotes the formation of micro-vortex flocculation.
研究领域:
环境科学
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水处理工程
✓ 已验证
产品关联
DOI
高影响因子
Water Research X
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2025
·
IF 8.2
Hong Tu,Bihong Tian,Zhichao Zhao,Renjiang Guo,Ya Wang,Shunhong Chen,Jian Wu
The structural modulation of pristine graphitic carbon nitride poses a considerable challenge in the rational design of catalysts for the efficient degradation of small organic pollutants under visible light. In this study, we combined first-principles calculations and the structure-function relationship to predict a high-performance catalyst. The results reveal that CN-8 demonstrates a remarkable degree of electron-hole separation. Notably, CN-8 shows exceptional degradation efficiency towards rhodamine B, tetracycline, bisphenol A, and fluralaner under visible light irradiation. Specifically, the degradation rate constants are 11, 4, 12, and 32 times higher, respectively, compared to bulk g-C 3 N 4 . Through density functional theory calculations and investigations of the structure-function relationship, it is confirmed that the superior catalytic activity of CN-8 lies in modifying the amino position, which alters the electron cloud distribution and promotes the efficient separation of photo-generated electron-hole pairs. This study provides valuable insights for the development of eco-friendly and efficient photocatalysts for environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
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2025
·
IF 9.8
Xifan Li,Guijing Chen,Xin Li,Zhaoyang Song,Wen Liu,Baicang Liu
The flourishing growth of electric vehicle market has led to pile of spent lithium-ion batteries (LIB), efficient treatment and recovery of retired LIBs is crucial for ecological environment and human health, especially the terminal treatment of spent lithium-ion battery raffinate (SLR). For selectively recycle Li + from SLR (the lithium and sodium concentration reaches up to 1000 mg/L and 31,200 mg/L, respectively), dibenzo 14-crown-4 ether (DB14C4) is synthesized as extractant for lithium due to the excellent size-match effect. The extraction performance of DB14C4 is evaluated from aspects of dosage, temperature, organic/aqueous phase (O/A) ratio, adsorption kinetics, adsorption selectivity and reusability through liquid-liquid extraction. The results manifested that DB14C4 exhibited fast adsorption kinetics and reached saturation in 1 h, and reached the highest adsorption capacity of 22.1 mg/g with concentration of 0.03 mol/L, O/A ratio of 1:4 and temperature of 25 °C. Besides, DB14C4 has excellent selective adsorption for Li + with lithium partition coefficient of 10.2 mL/g and Li + /Na + separation factor of 13.2. Furthermore, the selectivity of DB14C4 to Li + is studied by density functional theory calculation, including structure optimization, molecular orbital analysis, charger transfer and natural bond orbital (NBO) analysis. The results show that DB14C4 preferentially complex with Li + with lithium ion lies in the center plane of crown ether ring, and the DB14C4-Li + complex has higher charge transfer and bigger stabilization energy than DB14C4-Na + . This paper provides a feasible method for lithium recovery from SLR to guarantee sustainable lithium supply for electric vehicles, and offers brand-new perspectives to evaluate the full life cycle of LIBs.
研究领域:
环境科学
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材料化学
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2024
·Vol. 12
·期 12
·2670
·
IF 2.8
Ke-Hong Chen,Ao-Tian Gu,Liang Zhang,Hao Tang,Zhi-Ming Zhang,Yi-Ming Zhou,Yu-Qi Cheng,Yi Yang
Chloramphenicol antibiotics (CAPs) are broad-spectrum antibiotics, and excessive consumption has led to increasingly dangerous residues in the environment. The accumulation of these highly toxic and difficult-to-biodegrade CAPs and their long-term exposure in ecological environments can pose insidious and long-term hazards to human health and aquatic organisms. In this study, co-carbon composite nanocatalysts (CoxZn10−x-NC) with many carbon nanotubes on the surface were prepared via the one-step pyrolysis of bimetallic CoxZn10−x-ZIF with different Co/Zn ratios and used for the degradation of trace amounts of CAPs in a water column. The microstructure and chemical composition of the prepared catalysts were fully characterized using SEM, TEM, and XPS. The CAP degradation experiments demonstrated that Co6Zn4-NC in CoxZn10−x-NC possessed the highest catalytic activity level, removing 100% of the CAPs in 60 min. The CAPs had a corresponding reaction rate constant of 0.22 min−1, and Co6Zn4-NC was able to completely mineralize 44.57% of them. Doping moderate amounts of Zn can effectively improve the carbon nanotube structure on the catalyst surface and promote the generation of monoatomic Co, thus improving catalytic activity. The results of the free-radical burst experiments and electron paramagnetic resonance (EPR) showed that the free-radical pathway mainly dominated within the Co6Zn4-NC+PMS system, in which SO4•−was the main ROS for CAP degradation.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Xiaohong Li,Junjie Qin,Ying Chen,Dong Chen,Quan Wang,Yong Chen
Cotton fabric (CF) modified with silica (SiO 2 ), chitosan (CS), and sodium alginate (SA), referred to as PDA/CF/SiO 2 -CS-SA or PCF/Si-CSA, exhibits both superhydrophilic and underwater superoleophobic properties. This dual-function material demonstrates an underwater-oil contact angle (UOCA) exceeding 159.8°. The fabric's surface has minimal oil adhesion, allowing crude oil to be easily removed by water rinsing. When used to treat simulated wastewater containing Cu(II) and oil (10 mg/L Cu(II)), PCF/Si-CSA achieved an oil/water separation efficiency of 99.0%, water flux of 32900 L·m −2 ·h −1 , and Cu(II) removal rate of 91.3 %. The surface of the PCF/Si-CSA of adsorbed Cu(II) leached with a dilute HCl solution, and the Cu(II) desorption rate reached 93 % within 150 s. PCF/Si-CSA shows superoleophobicity under water (UOCA>150°) after 1 mol/L H 2 SO 4 , 0.5 mol/L NaOH, saturated NaCl immersion for 20 days, and abrasion by 500# sandpaper 300 times. Obviously, the dual-function PCF/Si-CSA exhibited good performance for simultaneous oil/water separation and heavy-metal removal.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Houchun Yan,Yujie Zhen,Anle Zhang,Tao Li,Wenxue Lu,Qingsong Li
To separate higher-rank phenols from coal tar model compound, the quantum chemistry calculation, solvent power, and selectivity analysis evaluated the separation efficiency of polyols as solvents, and the liquid–liquid equilibrium data of toluene + {4-ethylphenol, 2-allylphenol, guaiacol, or 2-isopropylphenol} + ethylene glycol were measured in 303.2 K and 101.3 kPa. The distribution coefficient and separation factor were calculated to compare the efficiency of extracting different phenols using ethylene glycol. The molecular dynamics (MD) method investigated the mechanism of extraction of phenols by ethylene glycol, and the results are consistent with the experimental results, indicating that ethylene glycol can be used as an extractant for the extraction of higher-rank phenols from coal tar, and the extraction effect in the 4-ethylphenol-toluene system is the best. The non-bonded interaction energy, radial distribution function, and self-diffusion coefficient were discussed, which shows that the interaction force between phenols and ethylene glycol is mainly provided by electrostatic force.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Yijie Wang,Guancheng Jiang,Qiannan Wang,Yinbo He,Lili Yang,Tengfei Dong,Xingxing Wang
In the development of deep shale oil and gas, the working temperature of the water-based drilling fluids is relatively high, which can cause wellbore instability due to the poor temperature resistance of the traditional environmental-friendly additives. To address this issue, this study presents a wellbore stabilizer called PMG, prepared by modifying gelatin (GT) with a resin synthesized by polyvinyl alcohol (PVA) and methacrylic acid (MA) through hydrothermal free radical polymerization, and it can withstand temperature up to 200 °C. The synthesis and thermal stability of PMG were confirmed by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). The wellbore stability performance of PMG was evaluated by linear swelling test, rolling recovery test, core immersion experiment and point load test and the wellbore stability mechanism was also investigated. The results reveal that the swelling height of sodium-based bentonite (Na-BT) in 2.0 % PMG solution at 150 °C is only 0.97 mm; the hot-rolling recovery rate in 2.0 % PMG solution at 200 °C is 72 %; the artificial core still maintains its original appearance after being immersed in 2.0 % PMG solution at 200 °C for 16 h, and the compressive strength increases by 12 %, effectively strengthening the wellbore. In addition, the EC 50 value of PMG is > 10 6 mg/L, and the BOD 5 /COD cr value is 31 %, indicating that it is non-toxic and biodegradable. PMG has excellent wellbore stability performance, in addition to being able to adsorb on the surface of Na-BT by electrostatic action and hydrogen bonding, the PMG micelles that precipitated from the aqueous solution due to the breaking of hydrogen bonds in the molecular chain at high temperature also form a film on the clay surface, aggregating and cementing the clay particles together, further enhancing the wellbore stability.
研究领域:
石油工程
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材料科学
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环境科学
✓ 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）