Nano Research
·
2021
·Vol. 14
·期 7
·2363-2371
·
IF 8.897
Lv Yan,Yue Lin,Khan Imran Mahmood,Zhou You,Cao Wenbo,Niazi Sobia,Wang Zhouping
Herein, we report the fabrication of Fe 3 O 4 @TiO 2 nanosheet/Ag/g-C 3 N 4 (Fe 3 O 4 @ns-TiO 2 /Ag/g-C 3 N 4 ) composite photocatalysts with well-designed hierarchical yolk-shell structure. To endow the composites with fascinating features, multiple functional components are perfectly integrated into the definite structure. The photodegradation experiments of organic pollutants revealed a significant enhancement in photocatalytic activity of developed composites as compared to P25, which is mainly due to the synergetic interaction of the tailored three-dimensional (3D) yolk-shell porous nanostructure, extended sunlight response range, and retarded the recombination probability of photogenerated electrons-holes. More importantly, the hybrid samples exhibited superior magnetic properties due to the magnetic component. The excellent magnetic recyclability and reusability of the photocatalysts are verified by the magnetic hysteresis loop and cyclic photocatalytic degradation experiments, which is significant for the green and sustainable applications of photocatalysts. Considering its remarkable photocatalytic performance and expectant magnetic recyclability, the composite photocatalysts are expected to be a promising candidate to dispose of future environmental issues.
✓ 已验证
产品关联
DOI
高影响因子
LAB ON A CHIP
·
2021
·Vol. 21
·期 10
·1886-1896
·
IF 6.799
Yaru Xing,Yu Liu,Rifei Chen,Yuyan Li,Chengzhi Zhang,Youwei Jiang,Yao Lu,Bingcheng Lin,Peizhong Chen,Ruijun Tian,Xianming Liu,Xing Cheng
Two-dimensional digital microfluidic platforms, on which droplets are actuated by electrowetting on dielectrics, have merits such as dynamic reconfigurability and ease for automation. However, concerns for digital microfluidic platforms based on low-cost printed circuit boards, such as the scalability of the electrode array and the reliability of the device operation, should be addressed before high throughput and fully automatic applications can be realized. In this work we report the progress in addressing those issues by using active-matrix circuitry to automatically drive a large electrode array with enhanced device reliability. We describe the design and the fabrication of a robust and scalable active-matrix driven digital microfluidic platform based on printed-circuit board technology. Reliable actuation of aqueous and organic droplets is achieved using a free-standing double-layer hydrophobic membrane. To demonstrate the versatility of the digital microfluidic platform, a pentapeptide is synthesized on the device within 30 minutes. With these improvements, a fully automatic, scalable, robust, reusable, and low-cost digital microfluidic platform capable of parallel manipulation of a large number of droplets can find numerous applications in chemical engineering, bioengineering and biomedical engineering.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Chen Kaiwei,Du Linlin,Gao Peng,Zheng Junli,Liu Yuanli,Lin Hua
The carboxylate-functionalized passion fruit peel (PFPCS) was an efficient and rapid biosorbent for wastewater treatment. The PFPCS exhibited excellent selectivity to the cationic dyes, where the maximum adsorption capacities for methylene blue (MB) and methyl violet (MV) were 1,775.76 mg g−1 and 3,756.33 mg g−1, respectively. And the adsorption process of MB and MV on PFPCS reached equilibrium within 20 min. Moreover, the adsorption conditions and mechanisms were investigated. The adsorption process was in good agreement with the pseudo-second-order and Langmuir isotherm models. The adsorption mechanism was also proposed to be electrostatic interaction and hydrogen bond. After six cycles of desorption-adsorption, the removal efficient of MB and MV could be kept above 95%. Thus, PFPCS was considered as a highly efficient absorbent for removing cationic dyes from polluted water due to excellent adsorption characteristics, low cost and environmental friendliness.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2021
·
IF 3.205
Jie Bai,Li-yuan Xie,Li Yang,Run-qin Wang,Xuan Chen,Shuang Hu
A hollow fiber liquid phase microextraction (HF-LPME) based on a reversed lipid micelle as the extraction phase was proposed and combined with high performance liquid chromatography (HPLC) for the determination of rotigotine in biological matrix. In the proposed procedure, pieces of hollow fibers were fastened on a magnetic stir bar using a thread to provide better precision. Rotigotine was extracted from 5 mL of diluted plasma sample phase with pH 6 into reversed lipid micelle (5 mmol/L of dipalmitoyl phosphatidyl choline in n -octanol/water) impregnated in both the wall pores and the lumen of the hollow fiber. After the extraction at 900 rpm and room temperature for 30 min, the acceptor phase of reversed lipid micelle was collected for HPLC analysis. Various parameters affecting the extraction efficiency, such as type of surfactant and organic solvent, surfactant concentration, sample phase pH, salt amount, extraction time, stirring rate, and dilution factor of the plasma sample, were investigated and optimized. Furthermore, the formed reversed lipid micelle was characterized by fluorescence method. Under the optimal conditions, the linear range of rotigotine was between 2 ng/mL and 100 ng/mL with determination coefficient ( r 2 ) ≥ 0.9913. It is shown from results of method validation that the satisfactory accuracy (the relative errors between −8.5% and 3.3%), precision (the relative standard deviations from 3.8% to 8.9%), stability and matrix effect were obtained. The enrichment factor ( EF ) of the reversed lipid micelle-based HF-LPME for rotigotine reached 126. And the feasibility of the proposed method was confirmed by the application to the pharmacokinetic study of rotigotine in rat plasma.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Yuanting Xu,Wanting Lin,Hui Wang,Jiabei Guo,Dandan Yuan,Jianxu Bao,Shudong Sun,Weifeng Zhao,Changsheng Zhao
How to remove environmental contaminants from wastewater has attracted widespread attentions in recent years. Herein, dual-functional polyethersulfone (PES) composite nanofibrous membranes with synergistic adsorption and photocatalytic degradation profiles for organic dyes were prepared through the combination of blending modification and electrospinning technology. Poly (acrylic acid-co-methyl methacrylate) copolymer was synthesized firstly; then the copolymer and PES were dissolved in a uniform TiO 2 suspension, and followed by an electrospinning process to fabricate composite nanofibrous membranes. The obtained membranes could adsorb rhodamine B (RhB) dye in dark via electrostatic attraction , and the residual RhB dye was further degraded under UV irradiation. More importantly, the synergistic effects of adsorption and photodegradation were explored. On one hand, the adsorption accelerated the photodegradation process owing to the easy access for catalyst-contaminants contacting. On the other hand, the photodegradation eliminated the residual toxins more completely, and realized the regeneration of adsorption active sites by continuous UV irradiation but without any other treatments. The excellent recyclability of 95% removal ratio even after 5 cycles was obtained via this green way. Additionally, the composite membranes could also adsorb and photodegrade various other dyes and applied in the treatment for mixed dye solutions. Thereby, this synergistic adsorption and photocatalytic degradation will provide useful insights to design highly efficient and green materials for environmental wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Jing Guo,Hongfei Bao,Yanqiu Zhang,Xi Shen,Jang-Kyo Kim,Jun Ma,Lu Shao
Graphene oxide (GO) membranes with unique sieving channels composing of galleries in stacked GO nanosheets , are promising for advanced separations towards environmental and energy remediation. Although GO membranes can be bridged by molecules to enhance the stability as well as separation capacity, the subtle alterations of GO stacking and the resulting changes of sieving channel structures induced by molecular intercalation failed to be delicately revealed. Herein, molecular intercalations are employed to generate spatial confinement on GO assembling and thus the structures of sieving channels are regulated. Moreover, different-sized intercalants are demonstrated display significant effects on GO stacking. Small-sized molecules facilitate in-plane orientation while large-sized molecules are inclined to inhibit the overlap, leading to a lower degree of alignment and a shorter transmembrane pathway and eventually a higher permeability. On this basis, the deliberately nanostructured GO membrane with both the superior robustness even under ultrasonication and an ultrafast water permeance surpassing 5 times than pristine GO membrane, is built by intercalation with optimal-sized molecules. This study provides the practical insights on realizing 2D GO material for cutting-edge separations.
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2020
·Vol. 8
·期 3
·70
·
IF 3.108
Zirong Qin,Jinyan Zhang,Ying Liu,Jingtao Wu,Guangli Li,Jun Liu,Quanguo He
In this work, we report a simple but efficient voltammetric sensor for simultaneous detection of ponceau 4R and tartrazine based on TiO2/electro-reduced graphene oxide nanocomposites (TiO2/ErGO). TiO2/ErGO nanocomposites were prepared by ultrasonically dispersing TiO2nanoparticles (TiO2NPs) into graphene oxide (GO) solution followed by a green in-situ electrochemical reduction. TiO2NPs were uniformly supported on ErGO nanoflakes, which provides a favorable interface for the adsorption and subsequent oxidation of target analytes. TiO2/ErGO showed remarkable electrocatalytic capacity for the oxidation of ponceau 4R and tartrazine, with minimized oxidation overpotentials and boosted adsorptive striping differential pulse voltammetric (AdSDPV) response peak currents. Under the optimal experimental conditions, the anodic peak currents of ponceau 4R and tartrazine increase linearly with the respective natural logarithm of concentrations from 0.01 to 5.0 μM. The detection limits (LOD = 3σ/s) for ponceau 4R and tartrazine are 4.0 and 6.0 nM, respectively. The extraordinary analytical properties of TiO2/ErGO/GCE are primarily attributed to the synergistic enhancement effect from ErGO nanoflakes and TiO2NPs. Moreover, the proposed TiO2/ErGO/GCE achieves reliable determination of ponceau 4R and tartrazine in orange juice with excellent selectively, reproducibility and stability. Together with simplicity, rapidness, and low cost, the proposed sensor demonstrates great potential for on-site detection of azo colorants.Keywords:ponceau 4R;tartrazine;TiO2;electro-reduced graphene oxide;voltammetric sensor
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Xianda Liu,Zhengxiang Zhou,Jiarui Yin,Chao He,Weifeng Zhao,Changsheng Zhao
Based on the strategy of copolymerization, methacrylatoethyl trimethyl ammonium chloride (DMC) and acrylamide (AM) copolymer hydrogel particles (PCM HPs) were prepared by precipitated droplets in-situ cross-linking polymerization, to overcome the easily fragile property of pure PDMC HPs and the low adsorption capacity of pure PAM HPs. Corn oil and deionized water were used for the reaction, which would not cause any pollutions; and the preparation process only took 40 s. Through the studies on various feeding ratios of DMC to AM, the hydrogel particles (PCM 5-1 HPs) with the mass ratio of 5:1, showed the best mechanical strength and adsorption capacity. The compression strength of the PCM 5-1 HPs was 207.7 K Pa, and no obvious mechanical loss occurred during five compression-rebound cycles. In addition, the removal ratios of anionic dyes such as amaranth red, orange G, and methyl orange were all higher than 94% (the initial dye concentration was 100 μmol/L and the adsorbent mass was 4 mg); and the adsorption capacity of orange G could reach as high as 992.63 mg/g. Meanwhile, the PCM 5-1 HPs exhibited excellent selective adsorption of anionic dyes in mixed dye solutions. Therefore, the hydrogel particles prepared by the fast and environmental-friendly method had both mechanical strength and ultrahigh adsorption capacity, which verified their practicality in the removal of anionic dyes in sewage.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2020
·
IF 7.098
Yue Zhang,Kongyin Zhao,Zhijian Zhang,Huike Xie,Ziyi Li,Ze Lin,Chen Mo,Wendong Yang,Xiaolei Wang,Junfu Wei
Calcium alginate hydrogel is an eco-friendly material, but its wide application as a self-supporting filtration membrane is severely limited by the weak mechanical properties, which makes it difficult for the large scale preparation and the fixation of the membrane in filtration equipment. In this work, a fiber-reinforced calcium alginate membrane (CaAlg-PP) was prepared by coating calcium alginate (CaAlg) hydrogel on the polypropylene (PP) non-woven fabric treated with ethanol/water (v:v = 1:1) solution. The CaAlg-PP filtration membrane was characterized and used for dye/salt separation under a series of operating conditions. The membrane exhibited the co-operativity of the porous support layer and the CaAlg hydrogel in the compositing process, and also exhibited good pressure resistance, pollution resistance and low anionic dye adsorption efficiency. The optimized CaAlg-PP membrane had a high permeance (e.g. 20.3 L·m −2 ·h −1 for methyl blue at 0.1 MPa) and high dye rejection (e.g. methyl blue 99.5%), while low salt rejection (e.g. NaCl 7.5%), and the selectivity of methyl blue/NaCl was up to 185. The CaAlg-PP membranes made with simple processes and low-cost materials may provide new strategies for environmentally-friendly and economical low salts-containing wastewater treatment and dye recycling.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Qing Han,Ying Sun,Kangwei Shen,Yan Yan,Xuejun Kang
Based on packed-fiber solid-phase extraction and HPLC-DAD, a simple analytical method for the determination of seven synthetic dyes has been successfully developed. Polystyrene/polypyrrole (PS/PPy) fibers were obtained via electro-spinning of polystyrene skeletal nanofibers , followed by the oxidation with FeCl 3 to trigger the polymerization of pyrrole and the deposition of polypyrrole coatings on PS fibrous skeleton fibers. The relationship between the extraction performance of the fibers and the electrospinning process at different humidities was investigated based on morphologic study and BET surface area. In the extraction process, purification , concentration, and desorption could be accomplished in one step. The established method exhibited good sensitivity, selectivity, reproducibility, and good efficiency for synthetic dyes in casual snacks (preserved fruit, flavored yogurt, and fruity hard candy) samples. With optimal conditions, the LODs (S/N = 3) were 2.4 to 21.09 ng mL −1 , and linearities were acceptable in liquid matrix and solid matrices. The recoveries were 93.9–103.9%.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Lunqiang Jin,Yusha Gao,Jiarui Yin,Xiang Zhang,Chao He,Qiang Wei,Xiaoling Liu,Feng Liang,Weifeng Zhao,Changsheng Zhao
Functionalized sponge adsorbent was prepared by a mussel-inspired strategy, which achieved successive modification of material and remained the properties of substrate. The dopamine derivative, DOPAm, was synthesized and adhered to polyurethane (PU) sponge before in situ polymerization with sodium p-styrenesulfonate. The adsorbent showed superior removal efficiency for cationic dyes (98.9 % for methylene blue (MB) at the concentration of 200 μmol/L); it took 1 s only for the adsorbent to adsorb the dyes by swelling and squeezing out the bulk solution simply. Meanwhile, the superior adsorption effect of the adsorbent could be maintained in a wide range of solution pH values from 1 to 13 at room temperature (293 K) in several repeat experiments, due to the slight influence of strong acid and alkali on polysulfonate. With unchanged other experimental conditions, the removal efficiency is still more than 90 % after reusing for 10 times at the different concentrations of MB dye solutions (50, 100, 200 μmol/L). For large-scale wastewater treatment, with the removal efficiency of 80.0 %, the adsorbent could purify 4.1 L wastewater containing MB dye (100 μmol/L) with the maximum flux of 22.2 L/(m 3 ·s) without the assistance of any equipment except for a vacuum pump. Therefore, the adsorbent has great possibilities to be applied in high-efficient and convenient treatment of wastewater in a large scale.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 2
·307
·
IF 4.324
Guangli Li,Jingtao Wu,Hongguang Jin,Yonghui Xia,Jun Liu,Quanguo He,Dongchu Chen
Titania/electro-reduced graphene oxide nanohybrids (TiO2/ErGO) were synthesized by the hydrolysis of titanium sulfate in graphene oxide suspension and in situ electrochemical reduction. It provides a facile and efficient method to obtain nanohybrids with TiO2nanoparticles (TiO2NPs) uniformly coated by graphene nanoflakes. TiO2/ErGO nanohybrids were characterized by transmission electron microscopy, X-ray diffraction, cyclic voltammogram, and electrochemical impedance spectroscopy in detail. Compared with pure ErGO and TiO2NPs, TiO2/ErGO nanohybrids greatly enhanced the electrocatalytic activity and voltammetric response of Allura Red. In the concentration range of 0.5–5.0 μM, the anodic peak currents of Allura Red were linearly correlated to their concentrations. However, the linear relationship was changed to the semi-logarithmic relationship at a higher concentration region (5.0–800 μM). The detection limit (LOD) was 0.05 μM at a signal-to-noise ratio of 3. The superior sensing performances of the proposed sensor can be ascribed to the synergistic effect between TiO2NPs and ErGO, which provides a favorable microenvironment for the electrochemical oxidation of Allura Red. The proposed TiO2/ErGO/GCE showed good reproducibility and stability both in determination and in storage, and it can accurately detect the concentration of Allura Red in milk drinks, providing an efficient platform for the sensitive determination of Allura Red with high reliability, simplicity, and rapidness.Keywords:TiO2;electro-reduced graphene oxide;Allura Red;voltammetric sensor
✓ 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）