International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yongfeng Liu,Jiangtao Zhang,Xiaojun Du,Yang Cao,Youyi Sun
Here, the Ag nanoparticles decorated graphene (AgNP@GNs) were fabricated by combing liquid phase exfoliation with in-situ solvent reduction method. Furthermore, the electrochemical sensitivity toward Cd 2+ and Pb 2+ ions was also investigated in detail. This AgNP@GNs presented the excellent electrical properties (2.5×10 4 S/m), meanwhile showed high electrochemical detection ability toward Cd 2+ and Pb 2+ . The sensitivity of AgNP@GNs toward Pb 2+ and Cd 2+ was ca. 15.2μA/μM (or 1246.4μA/μg L -1 ) and 0.09μA/μM (4.32μA/μg L -1 ), respectively. The AgNP@GNs was also evaluated to electrochemical detection of Cd 2+ and Pb 2+ in real water, in which the recoveries (96~124%) were obtained. The work does not only provide a facile method to synthesize AgNP@GNs with good dispersion, but also showed good electrical properties for various applications.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2023
·Vol. 18
·期 5
·e2962
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IF 1.8
Tianming Yang,Xin Xin,Jin-Chi Jiang,Zhenhao Yin,Long-Yue Meng
The sensitive detection of heavy metal ions with high toxicity and mobility is extremely important for environmental monitoring. In this study, nitrogen-doped biochar (N-BC) was synthesized using waste mushroom bran as a raw material, and nitrogen atoms were successfully doped onto the surface of the biochar via a facile process using an activation-carbonation strategy. The functional groups on the surface of the biochar were enriched via doping, and the roughness of the biochar surface was significantly improved. Experimental results showed that N-BC was an efficient sensing material for electroanalysis; therefore, it was used to construct a novel electrochemical sensing platform. The electrochemical response of the biochar-modified working electrodes was effectively improved for the detection of heavy metals. Under optimized deposition potential, enrichment time, and pH, the N-BC-based sensing platform could detect Pb 2+ and Cd 2+ separately as well as simultaneously, indicating its significant potential for electrochemical sensing.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 10
·10174-10187
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IF 2.914
Ren Hong-shan,Cao Zhan-fang,Wen Xin,Wang Shuai,Zhong Hong,Wu Zai-Kun
In this paper, a magnetic nano-Fe 3 O 4 /triethanolamine/GO composite (TEA-GO-FE) was prepared by using graphene oxide (GO), triethanolamine (TEA), and ferric chloride. The result indicates that triethanolamine acted as an important role for the growing of Fe 3 O 4 and adsorption ability of composite material. The synthesis mechanism of TEA-GO-FE was investigated through the medium of SEM-EDS, XRD, FT-IR, and TEM. The characterization results indicated Fe 3 O 4 nanoparticles have been successfully loaded on the surface of graphene oxide and they were encapsulated by TEA and have excellent stability. According to the results of XRD, the general particle size of Fe 3 O 4 on TEA-GO-FE was 27.5 nm. In order to understand the adsorption properties of TEA-GO-FE for Pb 2+ and Cu 2+ , this article uses a static adsorption study method. The optimized adsorption conditions are as follows: pH = 5.0, temperature is 293.15 K, and the ion concentration is 100 mg/L. Under the optimized prerequisites, the adsorption capacities of Pb 2+ and Cu 2+ were 121.5 mg/g and 68.7 mg/g, separately. Through thermodynamic as well as kinetic studies, the adsorption process of Pb 2+ and Cu 2+ on TEA-GO-FE is a self-heating process.
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
Advanced Optical Materials
·
2024
·Vol. 12
·期 20
·2400184
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IF 8
Yue Li,Haolin Lu,Rui Yun,Huanxin Yang,Yuling Liu,Zhaoyu Wang,Song Wang,Guankui Long,Xiyan Li
Lead-free perovskites exhibit unique crystal structures and optical properties due to their low-dimensional structure. However, the 0D structure of Cs 2 InCl 5 ·H 2 O usually demonstrates poor optical properties at room temperature due to their extremely strong electron–phonon coupling interaction. In this study, a doping strategy is employed by introducing Pb 2+ into Cs 2 InCl 5 ·H 2 O, resulting in the achievement of an efficient broadband blue emission, with a photoluminescence quantum yield (PLQY) of 58%. The temperature-dependent PL spectra reveal that the efficient emission is attributed to the weakening of the electron–phonon coupling strength in the lattice and the inhibition of the phonon-assisted non-radiative recombination process through Pb 2+ doping. The validity of this deduction is further corroborated by the results of the Raman spectra. The results of the first-principle calculation demonstrate that the broadband emission originates from multiple emission paths in In 3+ and Pb 2+ polyhedrons. In addition, Pb 2+ -doped Cs 2 InCl 5 ·H 2 O can realize the transformation from sky-blue emission to deep-blue emission by absorbing water in the air. Remarkably, this change is reversible during the heating–cooling cycles, demonstrating excellent optical stability with repeatable recyclability.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Fengping Liu,Wei Huang,Zhenfa Zhang,Cuizhong Zhang,Qing Huang,Gang Xiang,Meiyan Liang,Jinyun Peng
In this work, a novel electrochemical sensor based on sulfur and nitrogen co-doped porous graphene (SNPG) is developed for the simultaneous detection of Cd 2+ and Pb 2+ by in situ plating bismuth film. The large effective surface area and doped sulfur and nitrogen in porous graphene supply active sites with high affinity toward Cd 2+ and Pb 2+ by electrostatic interaction to improve the sensor performance, and the bismuth film improves the stripping voltammetric performance by forming bismuth-metal (Cd, Pb) alloys. Under optimized conditions, this sensor exhibits linearity in the range of 0.05-2 μM for Cd 2+ and Pb 2+ with a low detection limit of 0.02 μM for Cd 2+ and 0.008 μM for Pb 2+ . Moreover, the proposed sensor was applied for the simultaneous detection of Cd 2+ and Pb 2+ in tap water with satisfactory results, suggesting that SNPG is a promising electrode material for detecting heavy metal ions.
研究领域:
材料科学
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环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Environmental Technology & Innovation
·
2023
·
IF 7.1
Yining Ji,Na Zheng,Bo Wu,Qirui An,Zimeng Li,Siyu Sun,Wenhui Zhang,Xiaoqian Li,Sujing Wang
A novel adsorbent was synthesized for the capture of heavy metals mixture in water by encapsulating hydroxyapatite-modified wood ear mushroom sticks biochar in calcium alginate beads (CA-HAP MB ). The surface structure and adsorption mechanism of the CA-HAP MB were characterized by Scanning electron microscopy and X-ray energy dispersion spectroscopy (SEM-EDS), Fourier transform infrared spectrometer (FTIR), X-ray diffraction patterns (XRD), and X-ray photoelectron spectroscopy (XPS). Under different conditions, CA-HAP MB for Cd 2 + and Pb 2 + were investigated for their adsorption properties in water and their competition. The adsorption capacities of Cd 2 + and Pb 2 + on the aerogel spheres reached 302.2 mg g −1 (2.69 mmol g −1 ) and 564.5 mg g −1 (2.73 mmol g −1 ), respectively (based on Langmuir). The aerogel spheres are easier to collect than biochar materials. The results show that CA-HAP MB composite aerogel spheres have a good application prospect in capturing heavy metal ions from water.
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
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Lumin Chen,Houyong Yu,Christopher Deutschman,Ting Yang,Kam Chiu Tam
We report a facile method to prepare a novel composite based on Fe-Cu alloy decorated cellulose nanocrystals (Fe-Cu@CNC) via simple oxidation-reduction reaction. Spherical zero-valent iron nanoparticles (NZVI) and sheet-like copper nanoparticles were serially anchored on the CNC surface, and the generated composite exhibited excellent antibacterial activities and highly efficient Pb 2+ removal. The composites had high antibacterial ratios of 95.9 %–99.9 %, because superoxide radicals can cause irreversible damage to the bacteria, eventually leading to apoptosis and bacterial death. Meanwhile, the Fe-Cu@CNC composite showed quick Pb 2+ ion removal, reaching a 70.76 % removal within 5 min, a total removal of 93.98 % after 1 h, and excellent reusability (retaining removal efficiency of 80.41 % after six cycles). The adsorption kinetics demonstrated that the adsorption behavior can be described by pseudo-second-order kinetic model (R 2 >0.99). This study offers a new strategy to prepare a promising composite with advanced antibacterial and heavy metal removal properties for wastewater treatment.
研究领域:
材料科学
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环境科学
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生物学
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DOI
高影响因子
Applied Water Science
·
2021
·Vol. 11
·期 9
·1-8
·
IF 3.874
Song Fuxiang,Wang Na,Hu Zezhou,Zhang Zhen,Mai Xiaoxue,Jie Weibo,Bin Liu
Oral medical wastewater with heavy metal ions (such as plumbum, Pb 2+ ) is regarded as the main pollutant produced in the oral cavity diagnosis, and the treatment process can pose a serious threat to human health. The removal of Pb 2+ from oral medical wastewater facing major difficulties and challenges. Therefore, it is of great significance to take effective measures to remove Pb 2+ by using effective methods. A new activated three-dimensional framework carbon (3D AFC), regarded as the main material to remove Pb 2+ in the oral medical wastewater, has been fabricated successfully. In this experiment, the effects of 3D AFC absorbing Pb 2+ under different conditions (including solid-to-liquid ratio, pH, ionic strength, contact time, and initial concentration, etc.) were discussed. And the result revealed that the adsorption kinetics process of Pb 2+ on 3D AFC conformed to the pseudo-second-order model and the adsorption isotherm conformed to the Freundlich model. Under the condition that pH = 5.5 and T = 298 k, the calculated maximum adsorption capacity of 3D AFC for Pb 2+ was 270.88 mg/g. In practical application, it has strong adsorption ability for Pb 2+ in oral medical wastewater. Thus, 3D AFC shows promise for Pb 2+ remove and recovery applications because of high adsorption capacity for Pb 2+ in oral medical wastewater due to its high specific surface area, outstanding three-dimensional network structure.
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
Results in Chemistry
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2022
·
IF 0
Xia Zhang,Lili Sun,Yangang Sun,Meng Zhou,Siqi Wang,Zihao Cao,Xueying Zhang,Yajun Wei,Yuandong Xu
Developing electroactive materials with superior sensitivity, selectivity, and so on is an important issue for target ions detection. Hierarchically heterostructured nanomaterials represent a kind of promising active materials for electrochemical sensors due to the synthetic effect between different components and the high surface area. Herein, heterostructured UIO-66-NH 2 /CNTs nanocomposites have been successfully synthesized via the solvothermal method and investigated for the detection of Pb 2+ ions. The SEM, TEM, XRD and FTIR collectively confirmed that the UIO-66-NH 2 was successfully loaded on the surface of the CNTs. The specific surface areas of the UIO-66-NH 2 /CNTs are 4–7 times higher than that of activated CNTs and more mesoporous structures appear in composite materials. The electrochemical impedance spectroscopy measurements showed that the concentration of CNTs could influence the electron mobility and the UIO-66-NH 2 /CNTs-15 exhibits the lowest charge transfer resistance and the highest capacitive property. The cyclic voltammetry study towards K 3 [Fe(CN) 6 ] further demonstrated that the CNTs can improve the conductivity of the composites especially for the UIO-66-NH 2 /CNTs-15, which was conducive to the sensing behavior confirmed by follow-up performance experiments. Under the optimized condition, UIO-66-NH 2 /CNTs-15 exhibits the best sensing performance towards Pb 2+ . Correspondingly, a high sensitivity of 1.64 μA (μmol/L) −1 and a low detection limitation of 0.206 μmol/L (S/N = 3) are achieved. Meanwhile, a wide detection range, excellent selectivity, repeatability, and stability are also obtained. The recovery experiment by standard addition method is also carried out and a satisfactory result has been attained indicating a promising sensor for practical application.
研究领域:
材料科学
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分析化学
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产品关联
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Qiushi Jiang,Chaoyue Zhao,Zhaolian Han,Guixia Yang,Nan Qu,Lianzhi Sun,Weiping Li,Mingyu Wang,Zhiqiang Cheng
The synthesis of three amino-functionalized polyacrylonitrile/bentonite (PAN/BT) composite membranes and the removal strategies of Pb 2+ and Congo Red (CR) from water were put forward. The successful synthesis of PAN/BT was confirmed by scanning electron microscopy, X-ray energy spectrum, differential thermogravimetric analysis, specific surface area and contact angle tests. In addition, although having a similar composition to PAN/BT, the functionalized membrane materials have more N-H and C = N groups and stronger wettability. The influences of the optimal contaminant type, adsorbent dosage, temperature, contaminant concentration and contact time on the adsorption process of the modified membrane materials were systematically investigated. The adsorption processes were in good agreement with the Langmuir model, in which the theoretical maximum adsorption capacities of γ-aminopropyl triethoxysilane (KH550)-modified PAN/BT (K-PAN/BT), diethylenetriamine (DETA)-modified PAN/BT (D-PAN/BT) and hydroxylamine hydrochloride (NH 3 OHCl)-modified PAN/BT (N-PAN/BT) for Pb 2+ were 200.1, 332.9 and 182.8 mg/g, and the theoretical maximum adsorption of CR was 346.9, 156.2 and 579.2 mg/g, respectively, which were higher than 88 and 149 mg/g of bentonite, exhibiting excellent component synergy. The adsorption equilibrium was reached within 100 min for both Pb 2+ and CR, and the adsorption processes were in accordance with the pseudo-second-order kinetics, involving chelation, cation exchange and ‘π-π’ interactions. It is worth mentioning that the N-PAN/BT membranes can remove high concentrations of anionic and cationic dyes with a difference of up to 100 times, with selective adsorption potential and excellent contaminant indicating ability, which has an application prospect in the field of environmental protection.
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
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Lu-feng Wang,Ya-nan Zhang,Mao-qing Chen,Yu Wang,Pengqi Gong,Yong Zhao
Due to the serious biological toxicity and environmental refractory of heavy metal ions, the detection of heavy metal ions in liquids has attracted great attention. A novel fiber optic surface plasmon resonance (SPR) sensor is presented for detecting lead ions (Pb 2 + ) with temperature compensation. The sensitivity of SPR channel to Pb 2+ is up to -41.55 nm/μM and the detection limit is 7.05 nM after three parallel experiments by synthesizing Schiff base and fixing it on the sensor surface. Using femtosecond laser-induced two-photon polymerization (TPP) technology, a compact fiber-tip miniature Fabry-Perot interferometer (FPI) was printed at the end of the fiber-optic SPR sensor, thus realizing the temperature measurement in the process of detecting Pb 2 + . The FPI channel exhibits a linear response to temperature and remains unaffected by Pb 2+ concentration, thus facilitating temperature correction. The experimental results also show that the proposed sensor has the advantages of compact structure, easy to prepare, good stability, specificity and repeatability. Therefore, this kind of sensor has great potential in various biochemical test applications, and opens up a new way to prepare compact and flexible optical sensors.
研究领域:
生物医学工程
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光学工程
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jingyu Cai,Junjie Shi,Jian Zhang,Xiaoyu Miao,Sen Wang,Longqiang Xiao,Dan Liu,Linxi Hou
Electronic-grade isopropyl alcohol is widely utilized in the cleaning of semiconductors and microelectronic components. Removing ions like Pb2+ is crucial since the presence of impurities may cause degradation of electronics, increased failure rates, and short circuits. Membrane materials offer a number of advantages in the field of adsorption separation; however, the lack of adsorption sites results in limited adsorption capacity. In the current work, guanidino-grafted NH2-MIL-101(Fe) was incorporated into polyvinylidene fluoride (PVDF) to prepare MOF/PVDF mixed matrix membranes (NM/PVDF) for the removal of Pb2+ from isopropanol. Benefiting from the larger specific surface area and more lone electron pairs in the guanidine group, the Pb2+ adsorption capacity of the as-prepared NM/PVDF membrane was 29.4458 mg/g, which was higher than that of the NH2-MIL-101(Fe)/PVDF membrane (20.9306 mg/g) and the pure PVDF membrane (6.7324 mg/g). The NM/PVDF membrane was able to reduce the concentration of Pb2+ from 500 to 86.73 ppb. This work highlights the potential of guanidine-grafted Fe-based MOFs/PVDF membranes as adsorbents for acquisition of electronic-grade solvents.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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