COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yurou Feng,Amatjan Sawut,Rena Simayi,Xieraili Maimaitiyiming,Xueying Jiao
With the advancement of science and technology, the issue of wastewater pollution has escalated, necessitating urgent attention to wastewater treatment . In this study, a highly efficient adsorbent for Cu 2+ was successfully synthesized through in situ self-assembly using Ca 2+ as the cross-linking agent in ZIF-8@ALG composite hydrogel. The results demonstrated that the incorporation of Ca 2+ as the cross-linker enhanced both adsorption capacity and swelling properties of ZIF-8@ALG composite hydrogel. Adsorption performance evaluation revealed that the hydrogel followed pseudo-second-order kinetic model for Cu 2+ adsorption and Freundlich isotherm model with a theoretical maximum adsorption capacity of 309.57 m g −1 . Thermodynamic analysis indicated that Cu 2+ adsorption onto the hydrogel occurred spontaneously with heat absorption. Furthermore, excellent reusability was observed after five cycles of usage without significant loss in adsorption efficiency. Overall, these findings highlight the potential application of ZIF-8@ALG composite hydrogel as an effective solution for wastewater remediation and recovery of heavy metal ions.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境污染治理
·
重金属去除
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 18
·e55316
·
IF 2.7
Jifa Bian,Zhongbin Ye,Xuecheng Zheng,Chengwen Deng,Lei Tang
This work used aqueous solution free radical polymerization to create polymers of 2-acrylamide-2-methylpropane sulfonic acid, itaconic acid, and allyl polyoxyethylene ether as a high-temperature resistant retarder (APMS/IA/APEG, from now on referred to as AIA). Gel permeation chromatography, fourier transform infrared (FTIR), proton nuclear magnetic resonance ( 1 HNMR), and thermo-gravimetric analysis (TG) were used to characterize their molecular structure and characteristics. Tests were conducted on the thickening time, rheological characteristics, and compressive strength of AIA in cement slurries. The cement slurry thickened for 276 min at 180°C during the test, and the cement stone's 24-h compressive strength was consistently more than 20 MPa. The hydration products were analyzed using x-ray diffractometer and scanning electron microscopy methods, which were then coupled with molecular dynamics simulations to elucidate the AIA retarding mechanism. When AIA is added to a cement slurry, it forms a chelate structure with Ca 2+ and a strong adsorption layer on the surfaces of the cement particles. This stops the cement from hydrating. The AIA side chain, APEG, can wrap the active group in AIA at low temperatures. AIA exposes more adsorption groups because of the APEG chains stretching at higher temperatures. AIA can, therefore, be used for deep well operations at high temperatures.
研究领域:
材料科学
·
石油工程
·
高分子化学
·
水泥化学
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Hongyan Tang,Liting Hao,Junchao Chen,Feng Wang,Huapeng Zhang,Yuhai Guo
A facile approach for fabrication of superhydrophobic and superoleophilic alumina membranes through surface modification is presented in this work. The modified alumina membranes were prepared through thermal decomposition of polytetrafluoroethylene (PTFE) materials on the surface of alumina membranes. Contact angle (CA) measurement shows that the modified alumina membranes exhibit superhydrophobicity (155°) and superoleophilicity (0°). Results of Fourier transform infrared spectroscopy, X-ray energy dispersive spectrometry, and X-ray photoelectron spectroscopy indicate that the fluoric groups were formed on the surface of the modified alumina membranes, which may be due to partial decomposition of the PTFE polymer and deposition during the sintering process. This is the key to hydrophobicity. Field emission scanning electron microscopy images demonstrate the occurrence of the fluoric layer, which further indicated that the pore size of the modified alumina membranes decreased. After sintering at 400 °C over 7 h under a nitrogen atmosphere, values of water rejection of the modified alumina membranes for oil/water separation are all higher than 97% over 4 h. A slight reduction in permeation flux can be found over 48 h. The results indicate the fluoric layer is firmly linked with the alumina membranes. The as-prepared membranes may have great potential for oil/water separation.
研究领域:
材料科学
·
膜技术
·
表面化学
·
环境工程
·
分离科学
✓ 已验证
DOI
高影响因子
PLANT PHYSIOLOGY AND BIOCHEMISTRY
·
2019
·
IF 3.404
Jie Li,Fan Wu,Qing Fang,Zheng Wu,Qingyun Duan,Xuede Li,Wenling Ye
The broad application and unique properties of graphene oxide (GO) nanosheets make them interact with other pollutants and subsequently alter their behaviors and toxicities. However, investigation on the effects of GO nanosheets on plant uptake of co-occurring heavy metals is scarce. We evaluated the mutual effects of cadmium (Cd) at 1 mg/L and different concentrated GO nanosheets (0, 1 and 10 mg/L) on the rice seed germination , further seedling growth , Cd uptake and accumulation in rice roots and shoots in a hydroponic system. The effects of GO were concentration dependent. GO alone at 1 mg/L showed no apparent effects, while GO alone at 10 mg/L accelerated the rice seed germination and root growth due to the improved water uptake . Cd alone showed adverse effects on the rice seed germination, which was alleviated by the presence of GO at 1 or 10 mg/L. GO at 10 mg/L also increased the membrane permeability , thus enhancing Cd uptake by rice roots and shoots. These results indicate that GO can change the effects of Cd on the rice seed germination and Cd uptake as well as accumulation in the roots and shoots of rice seedlings, which is helpful for understanding the fate and ecotoxicological impacts of both GO and Cd.
研究领域:
环境毒理学
·
植物生理学
·
纳米生物学
·
重金属污染
·
农业环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Weiji Dai,Kai Ren,Yin-an Zhu,Ye Pan,Jin Yu,Tao Lu
Efficient electrocatalysts based on earth-abundant elements are urgently required for promoting the efficiency of electrochemical water splitting. In this work, heterostructures of CoNi 2 S 4 /Ni 3 S 2 on nickel foam (CoNi 2 S 4 /Ni 3 S 2 @NF) are synthesized by a facile one-step hydrothermal method as promising bifunctional electrocatalysts. To achieve an electrocatalytic current density of 10 mA cm −2 in 1 M KOH solution, the CoNi 2 S 4 /Ni 3 S 2 @NF electrode requires overpotential as low as 171 mV and 243 mV for HER and OER , respectively. Furthermore, the overall water splitting device with CoNi 2 S 4 /Ni 3 S 2 @NF electrode as both cathode and anode requires 1.65 V to offer current density of 10 mA cm −2 . Density functional theory calculations reveal that the strong coupling interactions between CoNi 2 S 4 and Ni 3 S 2 synergistically optimized the electronic structure, thus enhancing the electrochemical water splitting performances. Surfaces oxidation of CoNi 2 S 4 /Ni 3 S 2 @NF electrode is considered to hinder the electrochemical activities for OER. The present work not only provides a promising bifunctional electrocatalyst for water splitting but also expands the applications of CoNi 2 S 4 based materials.
研究领域:
材料科学
·
电化学
·
能源化学
·
纳米催化
·
可持续能源
✓ 已验证
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 9
·3943-3950
·
IF 2.817
Cai Xinhao,Li Hanghang,Li Jing,Yan Huihui,Liu Yiwen,Yu Haoxiang,Yan Lei,Zhang Liyuan,Shu Jie
Rechargeable aqueous Zn/MnO 2 battery with mild electrolyte is exceedingly suitable for massive electrochemical applications due to its eco-friendliness and high safety. However, cycle stability is a crucial question in the practical application. Besides, the mechanism involved in energy storage is still controversial. Here, we show a Zn/MnO 2 battery with excellent cycle stability and provide the reasonable explanation of the operating mechanism. In this battery, the mild aqueous ZnSO 4 solution containing MnSO 4 and Na 2 SO 4 additives serves as the electrolyte and the β-MnO 2 nanorods serve as the cathode. As presented in the electrochemical tests, the specific capacity of β-MnO 2 nanorods is as high as 323.5 mA h g −1 , and its capacity retention is 94% after 1000 cycles at 3 A g −1 . The proposed energy storage mechanism is related to the reversible conversion reaction between β-MnO 2 and MnOOH. Therefore, the application of β-MnO 2 nanorods in aqueous Zn-ion battery has broad development prospects. Graphical abstract
研究领域:
电化学
·
材料科学
·
能源存储
·
无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2018
·
IF 4.92
Juguo Dai,Qinfen Tian,Qianqian Sun,Wenkang Wei,Jiandong Zhuang,Meizhen Liu,Zhen Cao,Weizhen Xie,Mizi Fan
Developing effective and “green” approaches to handle aquatic pollution problems is currently one of the most important research subjects of environmental remediation. In this paper, an environmentally friendly, low cost, self-cleaning, highly stable and multifunctional TiO 2 enhanced Sodium alginate composite (SAT) aerogel for oil-water separation is developed via a simple combined ionic cross-linking and freeze drying method. The morphological, structural and surface chemical properties of the as-prepared SAT aerogels is characterized by scanning electric microscopy (SEM), X-ray diffraction (XRD), Flourier transformation infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The characterizations demonstrate that the SAT aerogel is of three-dimensional porous microstructure with uniformly dispersed TiO 2 nanoparticles (NPs) on alginate matrix. The hydrophilic alginate matrix combined with this unique morphostructure will ensure the SAT aerogels with underwater oleophobicity and subsequent excellent oil/water separation efficiency (up to 99.7%). Moreover, the firmly attached TiO 2 NPs can also endow the aerogel with better UV-aging resistance, photoinduced self-cleaning and environmental remediation performance. The SAT aerogel exhibits better oil/water separation reusability (at least 60 cycles) compared to SA aerogel and excellent photocatalytic performance for methyl orange (MO) degradation (>85% after 6 times repeated use). The “green” facile fabrication process, excellent oil/water separation, photoinduced self-cleaning and reusable performances make the SAT aerogel promising for practical application in aquatic environments. This work may open up new avenues for designing versatile aerogel for wastewater remediation .
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
水处理技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 10
·5702-5711
·
IF 10.733
Yawei Wang,Shu Jin,Guoxiang Pan,Zuxin Li,Long Chen,Gang Liu,Xiaoxiang Xu
In spite of strong visible light absorption and ideal band edge positions, LaTaON2 normally has very poor photocatalytic activity under ordinary conditions. Previous modifications of LaTaON2 such as aliovalent doping generally lead to strong reduction of its visible light absorption, being unfavorable for solar energy harvesting. Here, we introduce Zr into the structure of LaTaON2 (i.e. LaTa1−xZrxO1+yN2−y (0 ≤ x ≤ 0.15)) and successfully improve its photocatalytic activities without sacrificing its light absorption capability. More importantly, Zr doping helps to reduce Ta4+ defect concentration, improve surface hydrophilicity and induce mesoporous microstructures in LaTaON2, all of which contribute to the superior photocatalytic activities for water splitting reactions. Apparent quantum efficiency as high as 0.93% at 420 ± 20 nm has been achieved on LaTa0.9Zr0.1O1+yN2−y (x = 0.10) for photocatalytic water oxidation reactions, being the highest AQE reported for LaTaON2 to date. Further photoelectrochemical analysis suggests that Zr doped LaTaON2 has better charge separation conditions, smaller interfacial charge transfer resistance and longer electron lifetime compared to pristine LaTaON2. This simple method using Zr as a dopant can be well extended to other perovskite oxynitrides.
研究领域:
材料科学
·
光催化
·
能源化学
·
无机功能材料
·
半导体光化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 8
·1311-1321
·
IF 5.047
Jingda Tang,Yancheng Qiao,Yanhui Chu,Zongfei Tong,Yifan Zhou,Wenlei Zhang,Shejuan Xie,Jian Hu,Tiejun Wang
Magnetic-field driven soft materials have found extensive applications in fields such as soft robotics, shape morphing and biomedicine. Compared to magnetoactive elastomers (MAEs), magnetic hydrogels have shown significant advantages for in vivo applications, because of their better biocompatibility, as well as their soft and wet nature. However, the poor mechanical properties and ion sensitivity of conventional magnetic hydrogels will severely limit their applications especially under physiological conditions. Double network hydrogels are tough and stable, but do not respond to environmental stimuli. Here magnetic double network (M-DN) hydrogels have been developed with outstanding mechanical performances and ion-resistant stability. M-DN hydrogels show a high modulus of ∼0.4 MPa and a high toughness of ∼1500 J m−2. The volume, magnetic and mechanical properties of M-DN hydrogels show negligible deterioration in ionic solutions. M-DN hydrogels exhibit magnetic responsiveness and have been used for tissue hyperthermia and drug release by magnetic induction heating. The induction heating behavior of M-DN hydrogels can be tuned to meet the clinical requirements, by changing the magnetic field strength or the composition of magnetic hydrogels. M-DN hydrogels may be inspiring to the development of responsive DN hydrogels and expand their more potential applications in load-bearing biomedical engineering.
研究领域:
生物医学工程
·
软体机器人技术
·
响应性材料
·
转化医学
·
肿瘤治疗
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
He Chen,Liang Kong,Yong Wang
Activation by nitric acid oxidation has been combined with atomic layer deposition (ALD) to modify microporous polypropylene (PP) membranes. Nitric acid oxidation with prewetting of t -butanol generates active groups on the inert surface of PP membranes. Metal oxides including Al 2 O 3 and TiO 2 are subsequently ALD-deposited on the activated membrane. Nitric acid oxidation is a mild approach to activate PP membranes. A short immersion in nitric acid for 10 min is able to generate oxygen/nitrogen-containing active species on the membrane surface , which leads to an evident increase (38%) in the membrane permeability. The mechanical stability and the integrity of the porous structure are well preserved after activation. Surface elemental analyses and microscopy observations confirm the successful deposition of metal oxides thin layers onto the activated membranes. In the deposition of either Al 2 O 3 or TiO 2 , the hydrophilicity of the deposited membranes is continuously improved with increasing ALD cycles, resulting in further increase in water flux. After 100 ALD cycles, the flux is doubled compared to that of the bare membrane. Al 2 O 3 is more efficient in enhancing the hydrophilicity and permeation than TiO 2 under identical deposition conditions because of the faster growth of Al 2 O 3 on the activated PP surface.
研究领域:
材料科学
·
膜技术
·
表面化学
·
高分子化学
·
化学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Huili Peng,Hao Wang,Jianning Wu,Guihua Meng,Yixi Wang,Yulin Shi,Zhiyong Liu,Xuhong Guo
It is still a challenging global task for oil/water separation. Here we fabricate superhydrophobic magnetic cellulose sponge (SMCE) that can be used to separate free oil/water mixtures and surfactant-stabilized W/O emulsions. The simple modification includes only two steps: a thin layer of ferroferric oxide (Fe3O4) was coated on cellulose sponge surface via codeposition method, and subsequently magnetic cellulose sponge was modified with hexadecyltrimethoxysilane, which could react with Fe3O4 or hydroxyl groups of cellulose. The purpose of coating Fe3O4 is to increase the roughness of the surface and recycle the sample by magnetic force. SMCE could separate oil–water mixtures with a high separation efficiency and good reusability. The sample is green, low cost, and environmental friendly, which makes it a promising candidate to be used in oil–water separation.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
表面化学
·
分离科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 5
·271
·
IF 3.504
Renyao Huang,Li He,Tao Zhang,Dianqing Li,Pinggui Tang,Yingying Zhao,Yongjun Feng
Magnesium silicate as a high-performance adsorption material has attracted increasing attention for the removal of organic dye pollution. Here, we prepared a series of magnesium silicate hydrates (MSH) in a hydrothermal route, and carefully investigated the corresponding adsorption behavior towards methylene blue (MB) as well as the effect of surface charge on adsorption capacity. The results show that surface charge plays a key role in the adsorption performance of MSH for MB, a negative surface charge density follows the increase of Si/Mg feeding ratio from 1.00 to 1.75, and furthermore the higher negative charge favors the improvement of the adsorption capacity. Among four investigated samples (MSH = 1.00, 1.25, 1.50, and 1.75), MSH-1.75 has the highest negative surface charge and shows the largest adsorption capacity for MB. For example, the equilibrium adsorption quantity is 307 mg·g−1for MSH-1.75, which is 35% higher than that of 227 mg·g−1for MSH-1.00. Besides, for MSH-1.75, the as-prepared sample with negative charge exhibits ca. 36% higher adsorption quantity compared to the sample at the zero point of charge (pHZPC). Furthermore, magnesium silicate hydrate material with Si/Mg feeding ratio = 1.75 demonstrates the promising removal efficiency of beyond 98% for methylene blue in 10 min, and the maximum adsorption capacity of 374 mg·g−1calculated from the Langmuir isotherm model.
研究领域:
环境化学
·
材料科学
·
纳米技术
·
物理化学
·
污染治理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）