ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 8
·11591-11604
·
IF 0
Lu Yuxi,Zeng Honghu,Lin Hua,Liang Yanpeng,Feng Mi,Zhou Zijian,Liang Zihao,Li Huawei,Chen Gongning
Since Cd(II) and As(III) have extremely opposite chemical characteristics, it is a huge challenging to simultaneously remove these two ions from aqueous solutions. Therefore, a novel iron sulfide-based porous biochar (FSB) was synthesized and used to evaluate its Cd(II) and As(III) removal performance and mechanisms. The characterization and batch experiments results indicated that FeS was successfully loaded on the surface of biochar and increased its adsorption sites. The iron sulfide-based porous biochar was very favorable for the removal of Cd(II) and As(III) in the weakly acidic environment. The maximum adsorption of Cd(II) and As(III) by FSB was 108.8 mg g −1 and 76.3 mg g −1 , respectively, according to the Langmuir and Freundlich isothermal adsorption model, and the adsorption equilibrium time was 12 h and 4 h, respectively, according to the pseudo-second-order kinetic model. In the coexisting ion system, Cd(II) adsorption was suppressed by Ca 2+ , Mg 2+ , and humic acid, but enhanced by PO 4 3− and As(III). As(III) adsorption was inhibited by PO 4 3− and humic acid. Precipitation and complexation are the predominant adsorption mechanisms of Cd(II) and As(III), which contribute to the formation of Cd-O, Fe-O-Cd, As-O, Fe-O-As, ternary complex Cd-Fe-As, and stable compounds FeAsO 4 ·2H 2 O and CdS. Therefore, The iron sulfide-based porous biochar can be an efficient and environmentally friendly candidate for the treatment of Cd(II) and As(III) co-polluted irrigation water.
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POLYMER BULLETIN
·
2023
·Vol. 81
·期 1
·969-993
·
IF 3.2
Li Chen,Zhen Weijun
Modified attapulgite (ATP-PS) grafted with polystyrene (PS) was prepared based on Pickering emulsion polymerization. The characterization of ATP-PS was studied by transmission electronic microscopy (TEM), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectrometer (FTIR) and contact angle analysis. TEM analysis showed that the surface of ATP-PS was coated with PS organic layer; XPS analysis showed that the proportion of C element in ATP-PS was much larger than that of ATP; FTIR analysis found that ATP-PS had more PS specific functional group peaks than that of ATP; Moreover, contact angle results showed that the hydrophobicity of ATP-PS was significantly improved compared with ATP. The above characterization analysis proved that the modification of ATP-PS was successful. Moreover, polyphenylene sulfide (PPS) hydrophobic porous membrane was prepared with 1-chloronaphthalene and dibutyl phthalate as mixed diluents and ATP-PS as additives. The results showed that 0.8 wt% of ATP-PS had a great effect on the structure and performance of the membrane. With the increasing of the mass proportion of ATP-PS in the preparation of PPS base membrane, the microstructure of PPS based membrane was changed from blocky bicontinuous to spherical granular bicontinuous. When the addition amount of ATP-PS was 0.8 wt% of the total mass of PPS base membrane, PPS based membrane had strong hydrophobicity and organic solvent affinity, and its n -butanol flux could reach 106.9642 L m −2 h −1 bar −1 . The rheological properties of PPS based membrane showed that ATP-PS was well compatible with the PPS, and ATP-PS was beneficial to crosslink between PPS molecular chains, thereby increasing the mechanical properties of PPS based membrane. Phase transition analysis demonstrated that ATP-PS (0.8 wt%) increased the melting temperature (2.34 °C) and crystallization temperature (2.63 °C) of PPS based membrane compared to PPS, thus allowing PPS to complete the phase transition at higher temperature interval during film formation, resulting in a stable microscopic cluster structure. Based on hydrophobic porous PPS membrane, PPS/ATP-PS/TA nanocomposites membrane with ATP-PS selective layer was prepared by co-deposition of tannic acid (TA) and ATP-PS on the surface of PPS membrane. The performance of PPS/ATP-PS/TA nanocomposites membrane was studied, which showed that the n -butanol flux of PPS/ATP-PS/TA nanocomposites membrane was 61.2913 L m −2 h −1 bar −1 . More importantly, the simulated filtration performance of MB dye organic waste liquid (the solvent is n -butanol) showed that the maximum rejection rate of MB dye reached 99.82%. These results demonstrate that PPS/ATP-PS/TA nanocomposites membrane will have potential application in the filtration of organic dye wastewater.
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高影响因子
Frontiers of Materials Science
·
2025
·Vol. 19
·期 3
·1-12
·
IF 2.3
Li Guofu,Sun Yuhua,Dong Yuchi,Chen Di,Hu Jing,Sun Mizhen,Yuan Jinxiu,Zhou Ziyan,Xie Guoqiang,Feng Lijuan,Zhang Yingchao,Chen Yingjie,Yu Liyan,Dong Lifeng
Incorporating a secondary metal and engineering heterogeneous nanostructures can significantly enhance the electrochemical performance of non-enzymatic glucose sensors. Herein, NiCo 2 O 4 nanowire (NW) arrays were enveloped with NiCo 2 O 4 nanosheets (NSs) using a simple hydrothermal method. NSs improved the electronic conductivity of NW arrays, while arrays prevented the aggregation of NSs, resulting in exceptional glucose sensing performance. In 0.1 mol·L −1 NaOH electrolyte, this composite electrode demonstrated remarkable sensitivity (7641 µA·mmol −1 ·L·cm −2 ), broad linear detection range (1 to 1250 µmol·L −1 ), low detection limit (0.16 µmol·L −1 ), and rapid response time (within 1 s), as well as excellent selectivity, reproducibility, and stability. Such a unique architecture of NiCo 2 O 4 NW arrays enhanced the specific surface area of the composite material, facilitating the efficient electron transfer between copper foam and NiCo 2 O 4 NSs. This work provides an economical and efficient approach for developing enzyme-free glucose sensing catalysts with superior electrochemical properties.
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高影响因子
Biomass Conversion and Biorefinery
·
2022
·Vol. 14
·期 4
·5295-5304
·
IF 4.05
Tong Dongshen,Chen Xingtao,Dong Yuxiao,Fang Zhi,Zhang Hao,Zhou Chunhui,Yu Weihua
Kaolinite is a layered silicate material with a Janus character and has been directly used as the solid catalyst for the hydrolysis of cellulose in our previous work. Reducing sugar (RS) is one of the most important intermediates for the utilization of cellulose. In the present study, metal ions dispersed on kaolinite was easily prepared and further evaluated for the hydrolysis of cellulose to RS in water. The metal ions dispersed kaolinite was characterized by XRD, BET, SEM(EDS), and XPS. The catalytic results showed that copper was the best co-catalyst among the tested metal ions and the kaolinite treated with 4(wt)% copper nitrate by calcination at 623 K showed the highest total reducing sugar (TRS) yield of 51% under 478 K with the mass ratio of catalyst to cellulose of 0.2 and weight ratio of water to cellulose of 7 for 3 h. Moreover, the catalyst could be easily regenerated by calcination and the yield of TRS on the regenerated catalyst decreased from 51 to 43.2% after four times reuse. The characterization results revealed that copper was highly dispersed on the outer SiO 4 tetrahedral layer. The surface cuprous species were the active sites and could make the C-O bond cleavage easily by attacking the positively charged carbon atoms of the β-(1,4)-glycosidic linkage in the cellulose. The leaching of the cuprous species was responsible for the deactivation of the catalyst. The copper dispersed kaolinite is the efficient catalyst for the hydrolysis cellulose to reducing sugars and worth further development. Graphical abstract
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高影响因子
Carbon Letters
·
2023
·Vol. 34
·期 1
·123-131
·
IF 4.5
Gao Guihai,Chen Jianxu
This study systematically investigated the efficacy of incorporating graphene/cerium hydroxide (GH) composite material into epoxy-modified polyurethane resin coatings for enhancing the corrosion resistance of Q690qE steel within polluted marine atmospheric conditions. The research encompassed a range of electrochemical assessments and analyses. Notably, the E/GH-0.3% coating displayed a substantially positive open-circuit potential (OCP) and prominently reduced corrosion current density, leading to annual corrosion rates of 2.72 mm/a following 25 days of immersion. Electrochemical impedance spectroscopy (EIS) elucidated the superiority of the E/GH-0.3% coating, characterized by the highest impedance modulus |Z| at 0.1 Hz, indicative of robust corrosion protection. Remarkably, the self-healing performance of E/GH-0.3% and E/GH-0.5% coatings was evidenced by the formation of a composite passivation layer at scratch sites, particularly pronounced after 40 days of immersion. These findings underscore the promising potential of the GH composite as an effective corrosion inhibitor, holding significant promise for the advancement of protective coatings in harsh coastal industrial environments.
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高影响因子
Nature Water
·
2024
·Vol. 2
·期 7
·663-673
·
IF 0
Zou Hao,Yang Xinge,Zhu Jingling,Wang Fan,Zeng Ziya,Xiang Chengjie,Huang Danfeng,Li Jun,Wang Ruzhu
In the face of escalating global water scarcity, intensified by population growth and agricultural demands, there is an urgent need to improve water efficiency in greenhouse cultivation. The rapid development of atmospheric water harvesting technology offers us an opportunity to address this issue. Here a novel, solar-driven, scalable hygroscopic gel, termed TCP-Li, that demonstrates exceptional water uptake capacity (3.38 g water g sorbent −1 ) and rapid solar thermal water release was reported. As a proof-of-concept application, we utilize this material in a transpiration and evaporation adsorption device (TEAD), which leverages the properties of TCP-Li to efficiently harvest water vapour from plant transpiration and soil evaporation. TEAD operates passively, absorbing moisture at high relative humidity during the night and releasing water for irrigation during the day using natural sunlight. Greenhouse experiments confirmed the efficacy of TEAD in ensuring normal plant growth while providing additional irrigation water (87.1 g per plant and 1,890.6 g m −2 ), thereby achieving an average water-saving effect of 44.9%. This study introduces a groundbreaking solution aimed at enhancing water efficiency in greenhouse cultivation, offering substantial potential for commercial and large-scale agricultural applications and significantly contributing to mitigating the global water crisis and optimizing water use in modern agriculture.
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Science China-Materials
·
2023
·Vol. 67
·期 1
·321-330
·
IF 8.1
Yan Xiaocao,Shi Qi,Cai Yudong,Tong Yaxuan,Wu Jihong,Weng Yunxuan,Gao Hainan
Functional hydrogel materials with large-scale deformation induced by ultra-low salinity as an external stimulus have promising applications in seawater osmotic energy harvesting, stimulus-responsive separation materials, intelligent sensors, and actuators. A salt-responsive hydrogel undergoing large volumetric changes (∼1/60) with the use of dilute salt solution (0.01–0.6 wt% NaCl) is designed via facile random copolymerization of polyelectrolyte and zwitterionic polymer chains in this study. The salt-responsive swelling/deswelling properties, morphologies, and mechanical properties of the prepared hydrogels are systematically examined. Internal reconfiguration of distinct polymeric networks is characterized by different salinity percentages via Raman spectroscopy. Subsequently, a portable ion-detection device comprising easy-to-access capillary tubes and salt-responsive hydrogel is successfully designed and compared with a commercial water quality monitoring device. Moreover, intelligent liquid valves with autosensing and actuating functions are developed for the regulation of liquid leakage and transport using the same salt-sensitive hydrogel. It is highly expected that these salinity ultra-sensitive ionic hydrogels would have great potential in monitoring and regulating freshwater resources, seawater osmotic energy harvesting, stimulus-responsive separation materials, and intelligent soft robotics and electronics.
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高影响因子
CHEMISTRY OF NATURAL COMPOUNDS
·
2025
·
IF 0.9
Wang Yong,Wang Wei,Liu Li-Na,Wei Dong-Lin,Liu Cong-Jun,Wei Shang-Hua,Gao Song,Yu Shu-Ping,Yao Ning,Wang Yu-Fei
A series of abietic acid derivatives modified with a triazole moiety at the C-18 position were synthesized using Huisgen 1,3-dipolar cycloaddition reaction of 18-azidoabietane with alkynes. The antitumor activity of the synthesized compounds was investigated through human cervical cancer cells (HeLa), human breast cancer cells (MCF-7) and human renal epithelial cells (HEK-293T). The outcome indicated that compounds 5e , 5f , 5j exhibited positive inhibitory activity against the tested tumor cell lines. In particular, the IC 50 value for the inhibitory activity of compound 5e against human breast cancer cells (MCF-7) was 11.2 μmol/L.
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高影响因子
Science China-Materials
·
2020
·Vol. 64
·期 4
·931-941
·
IF 6.098
Chen Wenwei,Zhuang Yixi,Chen Changjian,Lv Ying,Wang Ming-Sheng,Xie Rong-Jun
Metal-organic frameworks (MOFs) and mechanoluminescent (ML) materials have been considered as two types of promising materials that have their own application fields. It would be amazing to endow one material with the advantages of ML and MOFs, thus broadening their applications. However, there are quite few investigations on this topic, and the ML mechanism in ML-MOFs remains unclear. In this study, we proposed a strategy for developing ML-MOFs by doping lanthanide ions into the non-centrosymmetric SBD ([Sr(μ-BDC)(DMF)] ∞ ) MOF, and successfully synthesized a series of lanthanide-doped MOFs Ln-SBD (Ln = Tb, Dy, Sm, Eu) and Tb 1− x Eu x -SBD ( x = 0.2, 0.4, 0.6, 0.8) with multicolor ML. The lanthanide ions were uniformly distributed in the matrix of the SBD-MOF, and occupied the Sr site. The MLMOFs exhibited intense multicolor ML emissions varying from green to yellow to red by changing the co-doping ratios and species of lanthanide ions. The similar ML and photoluminescence (PL) spectra indicated that the ML emission was assigned to the radiative transition from the excited states to the ground states of lanthanide ions. The radiative transition was induced by the electron bombardment process that originated from the piezoelectric effect of the non-centrosymmetric SBD host. In addition, a pioneering temperature sensing research based on ML was carried out, which is promising for realizing dual-functional detection of stress and temperature without excitation light sources. This study gives a unique insight for developing more versatile and interesting smart materials by combining the versatility of MOF with the ML emission, imparting additional values to both MOF and ML materials. Moreover, this study provides a general rule for selecting MOFs with an acentric structure as the host for ML materials.
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高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 22
·期 3
·309-314
·
IF 1.87
Chen Le,Wang Yue-Wei,He Ming-Yang,Chen Qun,Zhang Zhi-Hui
5A zeolites were facilely synthesized from attapulgite clay and sodium aluminate precursors. The optimum synthesis condition for 4A zeolite (Na-form) were H 2 O/attapulgite ratio of 40:1 volume/mass, NaOH/attapulgite mass ratio of 2.35:1, the crystallization time was 4 h at 80–85 °C. The 4A zeolite was converted to related 5A zeolite (Ca-form) through ionic exchanges using calcium chloride solution with the Si/Al mole ratio of 1.3. SEM images demonstrated that as-synthesized 5A zeolites are ordered cubic crystals, average crystals length dimension is 1–2 μm. And the zeolites product had a specific surface area of 482 m 2 g −1 and total pore volume of 0.274 cm 3 g −1 . The static adsorption experiments showed that the equilibrium adsorption capacities of n -decane and n -pentadecane on produced 5A zeolite were 0.253 and 0.510 g g −1 , respectively. And the adsorption equilibrium time of n -decane and n -pentadecane on 5A zeolite were 45 and 60 min, respectively. The experimental adsorption data of n -decane and n -pentadecane on three zeolites could be properly fitted by the Langmuir–Freundlich isotherm model.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 8
·6088-6097
·
IF 3.442
Luo Bin,Zhang Xiong,Xie Tian,Zhou Yanping,Huang Kama
Microwave heating has been widely used to enhance the fabricating rate of nanomaterials in the past few decades. However, the application of interaction between microwave and chemical reaction in tuning nanomaterials morphology is yet to be explored, while strategies to manipulate material nanostructures are of great importance for enhanced function. In this work, we demonstrate the potential of microwave in tuning the morphology of nanostructured NiCo DHs by accurate temperature control through the precise design of microwave reacting system. We find that 200-W microwave irradiation gives yield to unique flower-on-sheet hierarchical structure of NiCo DHs, while microspheres are derived from oil-bath heating. Microwave power is found to play a vital role in the tuning process. When microwave power decreases to 50 W, assembled nanoflakes are obtained; when microwave power increases to 300 W, microspheres are obtained. Further, fluid permittivity is monitored and field intensity in the reacting region is simulated and found to increase with time. Taken together, it is proposed that field-induced de-solvation possibly exists and is the main tuning mechanism. When tested as electrode materials in supercapacitor, products obtained from 200 W microwave treatment show enhanced storage capacities, especially at high current density.
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高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2016
·Vol. 125
·期 1
·11-16
·
IF 1.781
Meng Yan-Bin,Xiao Sheng-Xiong,Zheng Xiao-Fang,Li Chuan-Hua,Zhang Dong-Dong,Wu Xu-Meng,Ye Li-Juan,Sun Li-Xian,Li Qiang-Guo
This work reports the purification of dihydromyricetin (abbreviation: DMY) by the recrystallization method, with a yield of secondary recrystallization of up to 77 %. The products were confirmed by element and spectral analysis. The results showed a sharp R-bond absorption peak located around the near-ultraviolet band, which is close to K-bond absorption, illustrating the occurrence of a large conjugation of carbonyl with adjacent phenol and hydroxyl. This was further confirmed by the infrared (IR) spectrum, i.e., the carbonyl stretching vibration peaks were red-shifted from 1700 to 1641 cm −1 . The standard thermodynamic energy was determined to be Δ c
U
θ m
[DMY(s), 298.15 K] = −(5437.44 ± 5.14) kJ mol −1 by an oxygen bomb calorimeter. Furthermore, the standard molar enthalpy of combustion was calculated to be Δ c
H
θ m
[DMY(s), 298.15 K] = −(5434.96 ± 5.14) kJ mol −1 , and the standard molar formation enthalpy of DMY was estimated to be Δ f
H
θ m
[DMY(s), 298.15 K] = −(2182.67 ± 5.33) kJ mol −1 .
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高影响因子
危险品化学品经营许可证（带存储）