Sustainability
·
2021
·Vol. 14
·期 1
·21
·
IF 3.251
Shuangshuang Zhang,Wenhui Zhang,Yazhen Wan
To remedy the widespread chromium (Cr) pollution in the environment, this study mainly used the ultrasonic-assisted co-precipitation and precipitation methods to prepare FeS-modified Fe-Al-layered double hydroxide (FeS/LDH) composite material. The experimental results showed that FeS/LDH has higher removal efficiency of Cr in aqueous solution and stronger anti-interference ability than unmodified LDH. Under the same reaction conditions, the removal efficiency of total Cr(Cr(T)) using LDH was 34.85%, and the removal efficiency of Cr(VI) was 46.76%. For FeS/LDH, the removal efficiency of Cr(T) and Cr(VI) reached 99.57% and 100%, respectively. The restoration of Cr(T) and Cr(VI) by FeS/LDH satisfied the Langmuir adsorption isotherm. The maximum adsorption capacity of Cr(T) and Cr(VI) achieved 102.9 mg/g and 147.7 mg/g. The efficient removal of Cr by FeS/LDH was mainly based on the triple synergistic effect of anion exchange between Cr(VI) and interlayer anions, redox of Cr(VI) with Fe2+and S2−, and co-precipitation of Fe3+and Cr3+.Keywords:chromium;FeS/LDH;double reduction;anti-interference;co-precipitation
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2023
·
IF 0
Jie Zhu,Yang Sun,Meng-Xin Duan,Zheng-Wu Wang,Xin Tan,Zhen Yu,He-Fang Wang
The fast and accurate detection of β-lactamase is a prerequisite of customized treatments and food safety. We present a pretreatment-free dual-excitation three-mode detection of β-lactamase by using ZnAl2O4:Cr3+ etched by ethylenediaminetetraacetic acid disodium (ZAO-EDTA) as a phosphorescent probe and nitrocefin as the signal mediator. The changes in the wavelength overlaps of UV–vis absorbance of nitrocefin upon interactions with β-lactamase and the dual excitation of ZAO-EDTA enable the design of three detection modes: i.e., the enhanced emission when excited at 393 nm, the quenched emission when excited at 533 nm, and the ratio of enhanced excitation of 393 nm and decreased excitation of 533 nm to determine β-lactamase. All three modes have a wide linear range, high sensitivity and selectivity, and fine anti-interference capability. The lowest limit of detection is observed in the ratiometric excitation mode (0.2 U·L–1), and the proposed method can directly detect β-lactamase in bacteria and milk samples without any pretreatments, with the spiked recoveries of 95.3–113% and relative standard deviation < 3.1%. Therefore, the proposed method would be attractive for the detection of β-lactamase in a complex sample, and the ZAO-EDTA probe can be widely used to establish other excitation ratiometric optosensings by changing other signal mediators.
研究领域:
分析化学
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生物传感
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食品安全
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微生物学
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DOI
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Tao Li,Lin Dai,Yixin Huang,Siwen Pan,Zijun Pang,Jing Zou
Nowadays, a number of spectrophotometric methods for Cr(VI) determination have been developed. Whereas most of them are sensitive to pH, metallic ions, temperature, etc, which render them out of feasibility and may result in erroneous measurement. Therefore, to overcome these drawbacks, a new spectrophotometric method with rapid detection, high accuracy and strong anti-interference ability was established. This method is based on the oxidative coloration of N,N -diethyl- p -phenylenediamine (DPD) and Cr(VI) to generate pink-colored DPD •+ radicals which showed maximum absorbance at 551 nm. Accordingly, different reaction parameters were optimized, the calibration curves (linear range 0.85–60 µM) were established with a high sensibility of (3.05 ± 0.02) × 10 4 M −1 cm −1 . The LOD and LOQ were determined to be 0.26 µM and 0.85 µM respectively, accompanied with a stoichiometric coefficient of near 1:3 (1:2.78). The DPD method exerted a satisfactory accuracy in natural water samples and a pretty good anti-interference performance towards various common co-existing metallic ions. Moreover, this method was successfully applied in the Cr(VI)-sulfite and Cr(VI)-hydroxylamine systems. Overall, the study highlights the DPD method as a promising approach for the Cr(VI) determination and provides a new perspective for the practices of spectrophotometry .
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-13
·
IF 5.3
Zhao Zhihua,Su Zijie,Lv Zhenli,Shi Pu,Jin Guixin,Wu Lan
Bi 2 S 3 /Ti 3 C 2 T x nanomaterials were successfully prepared through a simple hydrothermal method. Various methods were used for their characterization, including XRD, XPS, SEM, EDS, and BET, along with testing their gas-sensing properties. The results showed that the response value to 100 ppm ammonia at room temperature reached 107%, which was 14.1 times higher than that of pure few-layer MXene. After undergoing anti-humidity interference testing, we observed that Bi 2 S 3 /Ti 3 C 2 T x exhibited a higher response value in real-time monitoring of ammonia as humidity increased. Specifically, under 90% humidity conditions, its response value reached 1.32 times that of normal humidity conditions. This exceptional moisture resistance ensures that the sensor can maintain stability, and even exhibit superior performance, in harsh environments. Therefore, it possesses excellent selectivity, high-moisture-resistance, and long-term stability, making it significant in the field of medical and health monitoring. Graphical abstract
研究领域:
材料科学
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医学监测
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Pan Miao,Yuxuan Deng,Chen Wang,Rongqin Chen,Jiayu Ma,Dongshen He,Junfeng Zhou
In this study, magnesium-aluminum layered double hydroxides (LDHs-MgAl) were controllable synthesized via coprecipitation and calcined at 400°C (LDHs-400-MgAl) for adsorption of glyphosate (Gly) from wastewater. The experiments showed that LDHs-400-MgAl exhibits outstanding adsorption capacities and stability within the range of pH 3.0 to 10.0. Particularly, LDHs-400-MgAl displayed excellent equilibrium and maximum adsorption capacities, measuring 192.31 mg/g and 259.85 mg/g respectively at 25°C compared with other adsorbents. Importantly, even in solutions containing diverse anions such as NO - 3 , CO 2- 3 , SO 2- 4 , and Cl - with concentrations as high as 0.1 mol/L, LDHs-400-MgAl exhibited exceptional anti-interference capability. Moreover, the adsorption process of Gly with LDHs-400-MgAl is in accordance with the pseudo-second-order kinetic model and Langmuir model, simultaneously showing the spontaneous and endothermic thermodynamics. According to the characterization analysis such as XRD, FTIR, SEM-EDS, TEM, TG-DSC, and zeta potential, the adsorption mechanism of Gly by LDHs-400-MgAl is mainly attributed to the combined effect of electrostatic attraction, surface coordination, ion exchange and ion intercalation. In addition, LDHs-400-MgAl can be reused after 0.075 mol/L Na 2 CO 3 regeneration. Consequently, LDHs-400-MgAl has good adsorption capacity, selectivity, a broad pH range, and considerable scalability potential, enabling the effective removal of Gly from complex water environments.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Junming Zhang,Yingyi Ma,Yuhang Han,Kaizheng Xu,Shun Yao,Lei Shi,Min Zhu
Restacking or aggregation inhibition of MXene nanosheets is crucial to the maintenance of their excellent electrochemical performance during use. In this study, a positively charged surfactant is inserted into the MXene nanolayers through a simple self-assembly process based on electrostatic interaction, producing a MXene/surfactant complex with enlarged interlayer spacing. Then 3D MXene-based porous structure could be prepared by the facile and low-cost breath figure method, in which MXene/surfactant complex is used as a casting material, therefore the inhibition of restacking or aggregation and increase of surface area at multiscale are realized in one system at the same time. Benefiting from the high conductivity of MXene and increased surface area of 3D porous structure that can provide massive active sites and facilitate the electrolyte infiltration and ion or electron access, enhanced electrochemical performance, for instance, electrochemical sensing of dopamine (DA) is shown. A low detection limit of 36.8 nM with excellent anti-interference, reproducibility, repeatability and long-term stability is realized. Good accuracy for DA detection in real biological samples is also confirmed by determining DA concentration in complex human urine samples. More importantly, porous structure such as pore size, uniformity, order and porosity can be adjusted through tuning the fabrication conditions, thereby regulating its electrochemical properties. This work not only provides a high-performance electrode for electrochemical sensing, but also offers a simple and practical strategy for the construction of 3D porous MXene film that holds great potential in electromagnetic interference shielding, supercapacitors and batteries.
研究领域:
材料科学
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电化学
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生物医学工程
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 8
·1-10
·
IF 5.3
Feng Lei,Chen Junji,Yang Min,Wang Juan,Yin Shougen,Zhang Deliang,Qin Wenjing,Song Jibin
Ti 3 C 2 T x MXene/Cu x O composites were prepared by acid etching combined with electrochemical technique. The abundant active sites on the surface of MXene greatly increase the loading of Cu x O nanoparticles, and the synergistic effect between the different components of the composite can accelerate the oxidation reaction of glucose. The results indicate that at the working potential of 0.55 V (vs. Ag/AgCl), the glucose sensor based on Ti 3 C 2 T x MXene/Cu x O composite presents large linear concentration ranges from 1 µM to 4.655 mM (sensitivity of 361 µA mM −1 cm −2 ) and from 5.155 mM to 16.155 mM (sensitivity of 133 µA mM −1 cm −2 ). The limit of detection is 0.065 µM. In addition, the sensor effectively avoids the oxidative interference of common interfering species such as ascorbic acid, dopamine and uric acid. The sensor has good reproducibility, stability and acceptable recoveries for the detection of glucose in human sweat sample (97.5-103.3%) with RSD values less than 4%. Based on these excellent properties it has great potential for the detection of glucose in real samples. Graphical abstract
研究领域:
材料科学
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生物传感
·
电化学分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ruizhi Yu,Zejun Deng,P.E. Sharel,Lingcong Meng,Run Wang,Yijia Wang,Haichao Li,Xiang Wang,Kechao Zhou,Li Ma,Quiping Wei
Boron-doped diamond (BDD) microsensors feature exceptional advantages such as long-term stability, excellent antifouling properties, and ultra-low background currents, considered the ideal biosensors for non-enzymatic quantification of analytes. Herein, we reported, for the first time, the use of dual BDD electrode metallic BDD films on BDD microparticles) for enzyme-free detection of uric acid in complicated sweat environments. The BDDME with a dimension of 450 μm exhibited a fast electron transfer kinetic constant of 1.68 × 10 −2 cm s −1 towards K 3 [Fe (CN) 6 ] and K 4 [Fe (CN) 6 ] and a large electrochemically active surface area of 0.13 mm 2 , larger than the real geometric surface area. The voltammetric response currents of uric acid in sweat environments followed a good linear relation with increasing concentrations in the range of 5 μM - 500 μM, along with a detection sensitivity of 16.02 μA μM −1 cm −2 and a detection limit of 0.77 μM. In addition, the BDDME is capable of achieving highly specific quantification of uric acid in the presence of diverse interference agents such as glucose, urea, and tyrosine. In addition, the BDDME showed long-term stability with 4.6 % fluctuations in the response current during repetitive tests for 360 days and could be fully activated by rinsing with water despite the possible adsorption fouling of urine and bovine serum albumin during tests. This work demonstrated the feasibility of long-term detection of sweat uric acid using a non-enzymatic way and provides a solution for the long-term management of gout and other diseases.
研究领域:
生物传感器技术
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医学检测
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chenhui Yan,Bowen Zhang,Yansong Liu,Zhibing He
There are strong radiological hazards and the risk of direct cell damage in living organisms for radioactive iodate (131IO3–/129IO3–). Thus, it is essential to capture and remove them. In the contribution, the micro flower-like Bi2S3 (MF-Bi2S3) was prepared via a hydrothermal method to investigate its adsorption behavior toward IO3–. MF-Bi2S3 exhibits the maximum adsorption capacity of 875.6 mg/g for IO3– at pH ≈ 3, and the adsorbent achieves a removal efficiency of 98.98% within 2 h. Furthermore, the removal efficiency of MF-Bi2S3 can still reach 96.37% at high concentrations of coexisting anions such as Cl–, SO42–, NO3–, and CO32–, demonstrating excellent anti-interference performance. In simulated artificial groundwater, the adsorbent achieves a removal rate of 88.8% for IO3–, suggesting its potential to solve the problem of IO3– in actual wastewater. Notably, the adsorbed products change depending on iodine content, with BiI3O9 and BiOI as the intermediate products, and the final product is BiOIO3. X-ray photoelectron spectroscopy detects the presence of I2 and I3– in the product, which is attributed to the reduction and fixed to iodine by S2–. Meanwhile, the corresponding S2– becomes SO42– and remains in the liquid after the reaction. This work provides a breakthrough solution for effectively removing IO3–.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 18
·18096-18108
·
IF 2.8
Wu Wanying,Chen Diyun,Li Jinwen,Su Minhua,Chen Nan
Uranium is a hazardous and radioactive element. Effective removal of uranium from wastewater stream requires advanced functional materials and reliable technologies. Red mud is a type of low-cost adsorbent which is widely used in the adsorption process. In the present work, we successfully modified the raw red mud to gain a series of highly efficient sorbents for uranium removal. They are nitric acid dealkalized red mud (DRM), aluminum nitrate modified red mud (ARM), and ferric nitrate modified red mud (FRM). The adsorption efficiencies of uranium(VI) by DRM, ARM, and FRM were 74.50, 95.56, and 98.75% in their optimal immobilization regions, respectively. The chemisorption of uranium dominates the adsorption process of FRM, while as to physical adsorption dominates the adsorption process of ARM and DRM. Both DRM and ARM reached their maximum adsorption capacities at 10 min while that for FRM occurred at 30 min. FRM performed much stronger anti-interference ability to the influence of carbonate and calcium. The outstanding adsorption ability of these modified red muds is mainly due to the enhancement of ion exchange, co-precipitation, and electrostatic attraction by red mud’s active components and functional groups.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ying Fang,Qianwen Liu,Yang Song,Feiyue Jia,Ying Yang,Haipu Li
Dissolved organic matter (DOM) extensively exists in high-arsenic groundwater with relatively high concentration, which could not only compete with arsenic for adsorption sites, but also depress As(III) oxidation in persulfate-based advanced processes (PS-AOPs) through scavenging free radicals (SO 4 • − and •OH). In order to effectively avoid the negative effect of DOM , an Fe/Co bimetallic metal–organic framework (Fe/Co MOF)-coupled peroxymonosulfate (Fe/Co MOF-PMS) system was rationally constructed for non-radical-dominated As(III) oxidation and chemisorption-driven As(V) adsorption. Results showed that the Fe/Co MOF-PMS system did realize anti-interference As(III) immobilization in DOM-rich high-arsenic groundwater, which was evidenced by no difference in As(III) immobilization efficiencies in the absence and presence of 20 mg/L humic acid (HA). During the oxidation process, 1 O 2 dominated As(III) oxidation while O 2 • − dominated HA oxidation, and the presence of HA significantly promoted the generation of 1 O 2 besides SO 4 • − and •OH. During the adsorption process, chemical adsorption mainly drove As(V) adsorption such as forming M-O-As (M = Fe, Co) bond, while physical adsorption forces played a major role in HA adsorption, such as π-π interaction, hydrogen bonding, and electrostatic attraction. The synergism of oxidation and adsorption processes made the anti-interference As(III) immobilization in DOM-rich high-arsenic groundwater in Fe/Co MOF-PMS system come true. This work is believed to shed light on the highly efficient purification of DOM-rich high-arsenic groundwater.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 4
·1300-1306
·
IF 4.174
Xiao-Yang Zhao,Hui Yang,Wen-Yuan Zhao,Jia Wang,Qi-Shan Yang
Bacillus anthracis is an extremely dangerous bacterium that is associated with high morbidity and mortality. 2,6-Pyridine dicarboxylic acid (DPA) is a major biomarker of Bacillus anthracis, and it is of great significance to be able to detect DPA in a rapid, efficient, and sensitive way. Herein, a 3D network metal–organic framework (Tb-MOF) with excellent thermal and water stability was synthesized. Tb-MOF could be used to selectively detect DPA via green fluorescence recovery with a fluorescence intensity enhancement factor of 103. In addition, due to the high detection sensitivity (a detection limit of 2.4 μM) and excellent anti-interference abilities, Tb-MOF was less affected by environmental factors when compared with a “turn-off”-response luminescence sensor; it can be employed as a promising “turn-on” luminescence sensor for DPA in the future. Finally, quantum calculations showed that a large energy difference appeared between the 5D4 level of Tb3+ and the first excited triplet energy level of H2-DHBDC2−, which was the reason that the complex did not show characteristic Tb3+ emission.
研究领域:
生物化学
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材料科学
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医学检测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）