Journal of Materials Chemistry A
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2017
·Vol. 5
·期 33
·17589-17600
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IF 8.867
Ze-Qing Guo,Nan-Xi Miao,Jian-Ping Zhou,Yu-Xi Lei,Qadeer Ul Hassan,Mei-Mei Zhou
A multifunctional material, Na2Fe2Ti6O16 (NFTO), was synthesized via a simple hydrothermal method for the first time. NFTO nanosheets with a long hexagonal plate shape enjoy double absorption, high magnetic moment and strong adsorption. The magnetic property allows for the convenient collection of the NFTO adsorbent from aqueous solution during recycling and double absorption in the visible-light region could be applied in visible-light harvesting. The double absorption and magnetic property originate from the d–d transitions of Fe3+, due to the effect of the crystal field. The adsorption process was evaluated by a methylene blue removal experiment and was found to have good agreement with the pseudo-second-order kinetics model and Langmuir isotherm. The NFTO nanosheets exhibit excellent recyclability, a high kinetic adsorption rate and a maximum adsorption capacity of 165.8 mg g−1 at equilibrium pH. These results are greatly significant for multifunctional NFTO as a promising adsorbent material used in water purification.
研究领域:
材料科学
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环境科学
·
光学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2019
·
IF 4.784
Dichu Lin,Mei Shi,Xixi Wei,Bingxin Liu,Jiangfei Cao,Changsheng Peng
In this study, the capsules were prepared via the one-step titration-gel method by injecting spherical droplets of polyvinyl alcohol (PVA), sodium alginate (SA) and graphene oxide (GO) gelled mixture into the bath with calcium chloride (CaCl 2 ) and oversaturated boric acid (H 3 BO 3 ) solutions. The prepared capsules were then further modified with glutaraldehyde (GA). The formation mechanism of the prepared capsules was investigated. The morphology of the prepared capsules exhibited distinct micro-porous “3D honeycomb” pattern and hierarchical pore sizes distribution . It was also observed that GA not only acted as a co-cross-linked reagent in the fabricating process to increase the specific surface area of the capsules, but also offered exceptional tolerance property to work under a wide pH range (i.e. 2–12). The PVA-SA-GO capsules performed comparatively much better than PVA-SA capsules and they improved the adsorption capacity by up to 21.94%. Their adsorptive performance well followed the Langmuir isotherm. Moreover, the pH of the MB solution was evidently declined after adsorption, demonstrating the electrostatic attraction or ion-exchange might be the governing removal mechanism of methylene blue (MB) dye by the capsules. Importantly, the prepared capsules could be regenerated by simply washing with water and reused for at least 6 consecutive treatment cycles.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2023
·Vol. 52
·期 30
·10472-10480
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IF 4
Pingping Teng,Ying Liu,Zhongqiao Sun,Hao Meng,Yide Han,Xia Zhang
Development of binary MOF-on-MOF heterostructures is a research hotspot in MOFs chemistry due to the advantages elicited by a closely connected interface, which may endow more abundant functionality and even broader applications in interface chemistry. A MOF-on-MOF heterostructure was constructed by in situ growth of MIL-88B on the outer surface of UiO-66. The resultant MIL-88B@UiO-66 produced had an interesting flower-like morphology composed of MIL-88B (petal) on tetrahedral UiO-66 (core). The MIL-88B@UiO-66 heterostructure showed adsorption and Fenton-like oxidation abilities, with distinctly improved structural stability in aqueous solution compared with that of single MIL-88B. Methylene blue (MB) was selected as the target molecule to evaluate the adsorption and Fenton-like oxidation activities. The efficiency of total removal of MB was studied systematically under various operating conditions and the influencing factors were optimized. The kinetics of adsorption and catalytic oxidation were simulated to explore the interactions between MB and MIL-88B@UiO-66. The mechanisms of enhanced adsorption and Fenton-like oxidation were suggested. The cyclic removal performance and structural stability of MIL-88B@UiO-66 were also determined.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2020
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IF 4.192
Jie Cai,Die Zhang,Wei Xu,Wen-Ping Ding,Zhen-Zhou Zhu,Jing-Ren He,Shui-Yuan Cheng
Agricultural production-caused water contamination has become an urgent environmental issue that has drawn much attention in recent years. One such contamination case is the environmental disposal of colored effluents from the food processing industry (i.e., food dyes). Effective methods for removing dye contaminants from water have been increasingly sought, and different adsorbents have been developed for this purpose. Here, polysaccharide-based hydrogels derived from cellulose were constructed and used in the removal of methylene blue (MB) (as the representative dye) from an aqueous medium (as simulated dye liquor wastewater). To improve the purification efficiency, TiO2 nanoparticles were encapsulated into cellulose nanofibers, which were consequently changed to hydrogels with respective advantages. The morphology, chemical composition, and structure of the as-prepared polysaccharide-based hydrogels and the transformation process from nanofibers to hydrogels were revealed by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction, and the presence of a gel network structure and TiO2 nanoparticles was confirmed. As expected, the polysaccharide-based hydrogels exhibited good MB removal performance because of their synergistic effects of absorption and photocatalytic degradation. Furthermore, the cell cytotoxicity test showed that the polysaccharide-based hydrogels possessed good biocompatibility. The facile, noncytotoxic, and general strategy presented here could be extended to the preparation of other polysaccharide-based hydrogel materials and has good prospects for application in wastewater treatment.
研究领域:
环境科学
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材料科学
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生物医学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Shang-yu Chen,Liang Li,Mai Feng,Ting Huang,Nan Zhang,Yong Wang
Enhancing the hydrophilicity/underwater superoleophobicity of fibrous membranes not only boosts their anti-contaminant property during oil/water separation, but also enhances their removal ability toward water-soluble pollutants. Here, a novel kind of electrospun polysulfone/titanium dioxide (PSF/TiO 2 ) composite membranes with UV-activated superwetting ability were fabricated by depositing spherical TiO 2 nanoparticles on the surface of PSF electrospun fibers through hydrothermal reaction . After activated by UV irradiation, the PSF/TiO 2 composite membranes (FPT-A-UV) exhibited amphiphilic features with water contact angle (WCA) and oil contact angle (OCA) approaching 0° in air while under-water oil contact angle (UWOCA) and under-oil water contact angle (UOWCA) exceeding 150°, respectively. The composite membranes showed high removal ability toward methylene blue (MB). Under the complex condition in purifying the emulsion containing MB, the removal ratio of MB achieved 90.8 % with water flux of 780.3 (L m −2 h −1 ). The FPT-A-UV composite membranes also exhibited good demulsification effects on various emulsified solutions. It is reasonable to expect that the composite membrane has satisfactory application prospects in wastewater purification, especially in harsh environments.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2015
·Vol. 2015
·期 18
·2928-2933
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IF 2.942
Xianjun Tan,Liujia Lu,Lingzhi Wang,Jinlong Zhang
Graphical A bimodal mesoporous Fe 3 O 4 @SiO 2 composite was fabricated through a facile self-assembly route. Unprecedentedly good tunability of the core size (180–1700 nm) and the shell thickness (20–75 nm) has been achieved. The composite exhibits excellent performance in organic pollutant removal through adsorption and photo-Fenton degradation. A facile self-assembly synthetic procedure was exploited to fabricate mesoporous-silica-capped Fe 3 O 4 mesoporous clusters, so-called bimodal mesoporous Fe 3 O 4 @SiO 2 composites. Structural characterization demonstrated that the core of the Fe 3 O 4 clusters is coated with a mesoporous silica shell of uniform size distribution. Moreover, unprecedentedly good tunability of the core size (180–1700 nm) and the shell thickness (20–75 nm) is achievable by changing the synthetic parameters. Application of the composite in the removal of the organic dye methylene blue (MB) from aqueous solution was examined. The composite exhibits excellent adsorption of methylene blue from aqueous solution (33.12 mg g –1 ) within 5 min and is easily regenerated by the photo-Fenton degradation reaction as a result of its high specific surface area, accessible pore channels, and good magnetic separation properties. This novel adsorbent promises extensive application in the practical removal of organic dyes.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2018
·Vol. 34
·期 3
·350-357
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IF 1.248
Liu Xiaofang,Zeng Shangjing,Wang Runwei,Zhang Zongtao,Qiu Shilun
Hierarchical silicalite-1 zeolites were obtained from the direct conversion of a mixture of ground solid raw materials via a steam-assisted crystallization(SAC) method without involvement of any mesoscale template. Only a trace amount of water was necessary during the crystallization, implying that the amount of water can be dramatically reduced, which still offers easy separation and high yields. The simple procedure involved only grinding and heating, which not only saves resources and energy, but also significantly reduces the discharge of eco-friendly synthesis of zeolites for practical applications. Compared to conventional bulk silicalite-1, the nanosized hierarchical zeolites with MFI structure show enhanced removal capabilities for methylene blue owing to their hierarchical porosity.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2022
·
IF 3.806
Wenshuai Jiang,Shumin Wang,Fei Lin,Zhenxin Li,Xiang Tian,Ruixia Ti,Chaoxin Zhang,Shaozhe Wang,Guoan Zhao,Wu Ren,Yi Yu
In this paper, we found that the presence of sodium chloride (NaCl) can effectively inhibit the diffusion of graphene oxide (GO) in water. Based on this discovery, we reported a simple preparation method of GO paper regulated by Na ions . By adjusting the drying temperature and the mass fraction of NaCl solution, the preparation and complete stripping of GO paper can be easily completed, thereby obtaining free-standing GO paper. Further, we also found that the introduction of sodium ions would cause changes in the microwave irradiation spectrum of GO paper, and the change was related to the mass fraction of NaCl solution used, which could be used to detect sodium ions and the concentration of NaCl solution. Besides, our study also showed that MWRGO paper with NaCl solution treatment can more effectively remove methylene blue in water, compared with MWRGO paper without NaCl solution treatment. This study provides the possibility of the preparation of GO paper based on seawater and also provides a new method for the detection of sodium ions and determination of sodium chloride solution concentration. It has important application prospects in the preparation of GO paper, sensor and water treatment.
研究领域:
材料科学
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环境科学
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传感器技术
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产品关联
DOI
高影响因子
RSC Advances
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2023
·Vol. 13
·期 35
·24819-24829
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IF 3.9
Xiangyu Meng,Yao Li,Yiqing Liu,Runyu Zhou,Yongsheng Fu,Junmin Chen
The removal of methylene blue (MB) in water is a challenging task due to its toxicity, carcinogenicity and resistance to biodegradation. Accordingly, a novel composite catalyst (BC@LF) was prepared by loading lanthanum ferrite (LaFeO3) on biomass carbon (BC) to activate bisulfite (BS) for methylene MB removal in this study. Characterization via scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) indicated that LaFeO3 was successfully loaded on BC. X-ray photoelectron spectroscopy (XPS) analysis suggested that Fe(III) was the main active site for BS activation. It was found that 99.4% MB was removed within 60 min in BC@LF/BS system. Sulfate radical (SO4˙−) and hydroxyl radicals (HO˙) were proved to be responsible for MB removal in the BC@LF/BS system and SO5˙− might also be involved in MB removal. The degradation efficiency of MB in the BC@LF/BS system decreased with increasing pH, while the adsorption efficiency of BC@LF for MB improved with increasing pH. Additionally, BC@LF exhibited good reusability for BS activation in successive uses. The BC@LF/BS system exhibited favorable removal effect for various organic compounds, indicating that it has good applicability in the treatment of organic wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 1
·176
·
IF 5.719
Tong Luo,Yanping Hao,Chao Wang,Weikun Jiang,Xingxiang Ji,Guihua Yang,Jiachuan Chen,Srinivas Janaswamy,Gaojin Lyu
A novel and effective green system consisting of deep eutectic solvent (DES) was proposed to prepare lignin nanoparticles (LNPs) without any lignin modification. The LNPs are obtained through the dialysis of the kraft lignin-DES solution. The particle size distribution, Zeta potential and morphology of the LNPs are characterized by using dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The average diameter of LNPs is in the range 123.6 to 140.7 nm, and the LNPs show good stability and dispersibility in water. The composite beads composed of LNPs and sodium alginate (SA) are highly efficient (97.1%) at removing methylene blue (MB) from the aqueous solution compared to 82.9% and 77.4% by the SA/bulk kraft lignin composite and pure SA, respectively. Overall, the LNPs-SA bio-nanocomposite with high adsorption capacity (258.5 mg/g) could be useful in improving water quality and other related applications.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
IF 5.876
Cheng Wang,Jiale Yu,Kai Feng,Lipeng Wang,Jianfeng Huang
In this study, the natural clinoptilolite zeolite was hydrothermally treated and then combined with porous silica-coated magnetic particles to prepare a porous magnetic zeolite-based material. Process parameters such as NaOH concentration, hydrothermal temperature and time, pH value, and Fe 3 O 4 /Na 2 SiO 3 ratio were optimized. XRD , XPS, N 2 adsorption-desorption technique, SEM-EDX, TEM, FTIR, etc. were employed to investigate the composition and structure of the materials. Cd 2+ ion and methylene blue were adopted to evaluate the contamination removal performance of the materials. The results showed that hydrothermal treatment under an alkaline environment could transform clinoptilolite to Na–P zeolite with a low Si/Al ratio and relatively high Cd 2+ adsorption capacity. Porous silica-coated magnetite loading could significantly increase the specific surface area of the material and render it magnetic. The as-prepared porous magnetic zeolite-based material exhibited much higher Cd 2+ ion and methylene blue removal performance than the raw natural clinoptilolite zeolite.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Kaixi Wang,Yong Liu,Xiaoying Jin,Zuliang Chen
Biosynthesis of nanoparticles using plant extract is one kind of the effective approach in developing rapid, clean, nontoxic, and eco-friendly technology . In this work, iron nanoparticles/reduced graphene oxide composites (Fe NPs/rGO) were facilely fabricated through one-step method with eucalyptu s leaf extract. The synthesized Fe NPs/rGO was investigated by various characterization methods. SEM results disclosed that Fe NPs with regular spherical shape of 70 ± 10 nm was uniformly dispersed on rGO. A basal plane of rGO with high surface area, providing more load sites for Fe NPs, which was confirmed by TEM . XRD and FTIR results indicated that biomolecules from eucalyptus extract were capped on Fe NPs/rGO. The EDS mapping showed that Fe NPs dispersed evenly on rGO, and XPS further confirmed that Fe NPs/rGO composite was mainly comprised with Fe NPs and rGO. Furthermore, the biomolecules of eucalyptu s leaf extract were identified by GC-MS to confirm that alcohol phenols acted as reducing agent, while alcohol acids and ketones acted as capping agents. In addition, the removal efficiency of Methylene blue (MB) up to 93% with Fe NPs/rGO. This work provides a simple, green cost-effective and environmentally friendly method to fabricate metal/rGO composite.
研究领域:
材料科学
·
环境科学
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生物学
✓ 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）