ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuan Yang,Xueqin Wang,Shenghao Xu,Beili Lu,Biao Huang,Xinyu Zheng,Guanfeng Lin
Hydroquinone (HQ) in wastewater is of great concern, as it is harmful to human health and threatens the ecological environment. However, the existing adsorbents have low adsorption capacity for HQ. To improve the removal of HQ, N,S-codoped activated carbon-ZIF-67 (NSAC-ZIF-67@C) was synthesized in this study by in situ growth of ZIF-67 on N,S-codoped activated carbon (NSAC) and carbonization. The influence of pH, contact time, and initial concentration on the adsorption behaviors of NSAC-ZIF-67@C on HQ were investigated. Owing to the synergistic effect of abundant active sites and well-developed pore structure, the NSAC-ZIF-67@C achieved a prominent adsorption capacity of 962 mg·g–1 and can still retain high adsorption performance after 5 cycles for HQ, which is superior to that of reported other adsorbents. HQ adsorption follows the pseudo-second-order kinetics model (R2 = 0.99999) and the Freundlich isotherm model. X-ray photoelectron spectroscopy (XPS) analysis before and after adsorption as well as density functional theory (DFT) calculation results showed that pyridinic-N-termini were conducive to the π–π interactions and hydrogen-bonding interactions. Therefore, the adsorption mechanisms of NSAC-ZIF-67@C on HQ involve pore filling, electrostatic attraction, π–π interaction, and hydrogen bonding. This study is expected to provide a reference for designing highly effective adsorbents for wastewater treatment.
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
NEW CARBON MATERIALS
·
2024
·
IF 6.5
Tan Yi,Jun-long Huang,Zong-heng Cen,Yi-wei Ji,Shao-hong Liu
Carbon-based catalysts are promising materials for the electrochemical extraction of uranium from seawater. However, their practical application is often limited by high cost and low catalytic activity. Using low-cost polystyrene sulfonic acid resin and melamine as raw materials, a class of nitrogen and sulfur co-doped carbon nanosheets (CNSs) with high catalytic activity has been developed by a low-temperature hydrothermal treatment and high-temperature carbonization. Because of their high conductivity and high catalytic activity, CNS-based electrodes can catalyze uranyl ions in seawater into easily recoverable Na 2 O(UO 3 ·H 2 O) x precipitates at −2 V, and achieve an extraction capacity of up to 3 923.7 mg g −1 with a uranium removal of 98.1% in uranium-spiked seawater (1×10 3 mg L −1 ). In situ Raman spectroscopy showed that a large number of uranium compounds appeared on the surface of the composite electrode within 40 min of extraction. The electrode also recovered 72.7% of the uranium in natural seawater, demonstrating excellent prospects for this application. This work provides a new approach into the design of low-cost, metal-free electrocatalysts for the efficient uranium extraction from natural seawater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Meiling Lian,Yuqing Shi,Wei Zhang,Jingbo Zhao,Da Chen
This work reports the synthesis and application of nitrogen and sulfur co-doped Nb 2 C MXene (NS-Nb 2 C) for the sensing of dopamine (DA) in gastric juice. NS-Nb 2 C MXene was successfully synthesized in a one-step treatment of Nb 2 C using thiourea as N,S resource. The heteroatom doping strategy enables introduction of N,S into MXene nanosheets and simultaneously induces the increased interlayer spacing, high surface area, and enhanced electrical conductivity. It was found that NS-Nb 2 C is more electrochemically active than multilayered Nb 2 C nanosheets (ML-Nb 2 C) and delaminated Nb 2 C nanosheets (DL-Nb 2 C). Based on this, the as-prepared NS-Nb 2 C/Nafion/GCE was used to study the electrochemical behavior of dopamine in pH = 3.0. The sensing interface not only utilizes the unique two-dimensional (2D) nanosheet morphology of Nb 2 C that has a larger surface area and conductive network, but also takes advantage of the more active sites provided by doping. This enables the sensor to achieve ultra-sensitive detection of dopamine (S/N = 3) with a low limit of detection (LOD) of 0.12 µM. In addition, the prepared sensor has good stability and selectivity, and the results of detecting DA in simulated gastric juice is satisfactory. The results indicated that the Nb-based MXenes provided a promising tool for acidic electrochemical sensing applications.
研究领域:
材料科学
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电化学传感
·
医学检测
✓ 已验证
DOI
高影响因子
Advanced Sustainable Systems
·
2022
·Vol. 6
·期 7
·2200060
·
IF 6.737
Hengfei Qin,Shipeng Luo,Yan Li,Yifan Zhang,Ruoyu Dong,Yang Zhou,Jing Luo,Yeling Zhu,Feng Jiang
The hydrogen production by water electrolysis has attracted great research interest as a sustainable approach for clean energy production. However, such process is plagued by the use of high-cost precious metal-based catalysts (such as Pt, RuO 2 ). Hereby, the use of a low-cost Nitrogen and Sulfur co-doped carbon-supported cobalt sulfide dual-functional electrocatalyst derived from imidazole modified lignin for overall water splitting is presented. To introduce nitrogen and sulfur heteroatoms in the carbon structure, lignin is modified by imidazolation through thiol-alkynes click reaction. Imidazole-lignin shows a strong chelation tendancy with cobalt salt, and N and the S co-doped cobalt sulfide catalyst (IL-Co@GC-PO) is obtained by pyrolysis. The IL-Co@GC-PO has an oxygen evolution potential of 1.57 V and a hydrogen evolution overpotential of 204 mV at a current density of 10 mA cm −2 . During the overall water splitting process, the IL-Co@GC-PO catalysts require only 1.58 V to reach a current density of 10 mA cm −2 , which is equivalent to the performance of the system composed of the noble metal Pt/C||RuO 2 . This work not only provides a strategy for the preparation of N and S co-doped cobalt sulfide catalysts, but also provides guidance for using lignin as a carbon source to design and develop cheap electrocatalysts.
研究领域:
材料科学
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能源化学
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催化化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 21
·16368-16375
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IF 3.84
Yupeng Sun,Chen Shen,Jing Wang,Yun Lu
A facile, simple, effective and green method has been developed to synthesize nitrogen and sulfur co-doped carbon dots (N, S-CDs) from heparin sodium. The as-prepared N, S-CDs possess naked-eye observable blue-green luminescence, good biocompatibility, low toxicity and strong fluorescence in live cell imaging, indicating their great potential to serve as high quality optical imaging probes. Besides, the N, S-CDs can also be used as a competitive fluorescent sensing platform for the detection of Fe3+.
研究领域:
生物医学工程
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Liping Feng,Yunzhen Chang,Hua Song,Wenjing Hou,Yanping Li,Yun Zhao,Yaoming Xiao,Gaoyi Han
Introducing fast pseudo-capacitance is an effective strategy to improve the capacitive performances of carbon-based materials. Here, thiourea is used as nitrogen and sulfur source to dope resorcinol formaldehyde polymer. Besides the forming of copolymer of thiourea and resorcinol formaldehyde resin, the thiourea resin also acts as template to adjust the hierarchical microstructure. The N, S co-doped porous carbon exhibits specific surface area of 3599.0 m 2 g −1 and wide pore distribution. The specific capacitance of the optimized sample can reach 461.7 F g −1 in 6.0 mol L −1 KOH electrolyte at current density of 0.1 A g −1 , and still retains 337.5 F g −1 at current density of 10.0 A g −1 , indicting good rate capability. The assembled symmetric device exhibits the maximum energy density of 14.9 Wh kg −1 at the power density of 61.9 W kg −1 based on the active materials. The capacitance can retain 98.3 % of the initial capacitance after 10,000 cycles at current of 10.0 A g −1 . Using organic electrolyte, the operating voltage can be extended to 2.1 V, so the energy density of the device reaches 38.3 Wh kg −1 at 262.5 W kg −1 . This co-doped strategy provides an effective approach to prepared carbon-based materials with high capacitive performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
·
IF 3.232
Xiupei Yang,Dan Wang,Na Luo,Min Feng,Xiaohui Peng,Xiangjun Liao
A simple and green approach for the synthesis of photoluminescent N,S-carbon dots (N,S-CDs) has been proposed using a single natural source precursor (bamboo leaf) as raw materials. The as-synthesized N,S-CDs exhibited a highly stable, excitation wavelength-dependent emission, excellent photobleaching, alkali, and salt tolerance. Here, the mechanism of N,S-CDs luminescence was studied via the UV–vis absorption spectrum and photoluminescence spectroscopy . Based on the quenching properties of nitrophenol compounds on the fluorescence of N,S-CDs, the interaction between N,S-CDs and nitrophenol compounds was investigated on detail in aqueous solution. More importantly, the study on photophysical properties of the N,S-CDs may provide the basis for the development of the N,S-CDs for the fluorescent probe of nitrophenol compounds.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale Research Letters
·
2020
·Vol. 15
·期 1
·1-9
·
IF 3.578
Zhang Xuzi,Shang Chaoqun,Wang Xin,Zhou Guofu
Co 9 S 8 is a potential anode material for its high sodium storage performance, easy accessibility, and thermostability. However, the volume expansion is a great hindrance to its development. Herein, a composite containing Co 9 S 8 nanofibers and hollow Co 9 S 8 nanospheres with N, S co-doped carbon layer (Co 9 S 8 @NSC) is successfully synthesized through a facile solvothermal process and a high-temperature carbonization. Ascribed to the carbon coating and the large specific surface area, severe volume stress can be effectively alleviated. In particular, with N and S heteroatoms introduced into the carbon layer, which is conducive to the Na + adsorption and diffusion on the carbon surface, Co 9 S 8 @NSC can perform more capacitive sodium storage mechanism. As a result, the electrode can exhibit a favorable reversible capacity of 226 mA h g −1 at 5 A g −1 and a favorable capacity retention of 83.1% at 1 A g −1 after 800 cycles. The unique design provides an innovative thought for enhancing the sodium storage performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Chenyu Wu,Xiuzhen Wang,Ying Zhu,Lei Dong,Jingjing Xu
Titanium dioxide (TiO 2 ) shows promise as an anode material for Li/Na-ion batteries due to its low cost and good cycling stability. However, the limited rate capability and poor conductivity severely limit their practical application. Herein, the nitrogen-sulfur co-doping nano TiO 2 is in-situ constructed on the Ti 3 C 2 T x MXene substrate (SN-TiO 2 @MXene) via facile partial oxidation of MXene. The introduction of S-N heteroatoms, TiO 2 @MXene heterostructures and nanostructures can enhance electronic conductivity, improve ions diffusion kinetics and promote the contribution of pseudo-capacitance. Moreover, the employment of three-dimensional conductive layered MXene parent phase as a substrate material can not only construct the conductive network but also enhance the structural stability of the electrode. The SN-TiO 2 @MXene composite achieves an impressive reversible capacity of 306 mA/g after 1500 cycles at 500 mA/g, and 241.1 mAh/g after 2000 cycles even at a high current density of 2000 mA/g in LIBs. Furthermore, this electrode exhibits a discharge capacity of 105 mAh/g after 1000 cycles at 500 mA/g in SIBs. This study demonstrates that the three-dimensional layered SN-TiO 2 @MXene composites hold promising prospects as anode materials for ion batteries, and offer valuable insights for the fabrication of titanium matrix composites with exceptional electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Nanophotonics
·
2024
·
IF 1.1
YingTe Wang,SiRong Cheng,RongRong Wu,YuanYuan Zhang,BoHan Wang
Nitrogen and sulfur co-doped green fluorescent carbon dots (G-CDs) with quantum yield (QY) of 28.26% were synthesized by hydrothermal method with p-phenylenediamine and thiosemicarbazone as precursors. The synthesized G-CDs exhibit good sensitivity and anti-interference ability for detecting copper ion (Cu2+) by fluorescence quenching (λex=390 nm, λem=535 nm) with a linear range of 20 to 200 μM and the limit of detection of 4.8 μM. This analytical method has been applied to detect Cu2+ of the local lake with good accuracy and recovery.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xuan Zhang,Siyu Xu,Yawei Gu,Ling Zhang,Longquan Zhang,Fengxu Shang,Xinze Song,Zhen Wang,Xiaoguo Shi,Honglei Zhang,Runze Bi,Jinbo Chen
Zero-valent iron (ZVI) technology has become prevalent for the in situ dechlorination of trichloroethylene (TCE) widely found in soils and groundwater. Nevertheless, ZVI technology still encounters several severe bottlenecks, including inadequate reactivity, poor selectivity, and unelucidated mechanism. Herein, we report that a C&S-mZVI bm material, with the Co-incorporation of C and S into Zero-Valent Iron, could significantly improve the degradation efficiency of ZVI, while simultaneously inhibiting the hydrogen evolution reaction (HER), thereby enhancing the electron selectivity in the TCE dechlorination. Comprehensive characterization techniques have demonstrated that the Co-incorporation of C and S into ZVI leads to better TCE affinity, faster electron transfer and lower charge-transfer resistances. In addition, novel FeS x and Fe 3 C species emerged as new active sites, resulting in two distinct reaction pathways. Specifically, when the C weight percentage is below 2 %, the cumulative quantity of hydrocarbon products surpasses that of DCE, indicating the dominant β-elimination pathway. Conversely, when the weight percentage of C exceeds 2 %, the overall hydrocarbon products fall short of DCE, suggesting that the TCE hydrogenolysis dechlorination reaction becomes the primary pathway. These insights can benefit not only the development of ZVI-based materials but also enhance the broad application of these materials in remediation of groundwater with chlorinated hydrocarbons.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhengjie Su,Chengning Ye,Yiyang Xu,Binghong Wu,Dong-Hau Kuo,Xinru Wu,Baoqian Yang,Pengkun Zhang,Longyan Chen,Dongfang Lu,Jinguo Lin,Zhanhui Yuan,Xiaoyun Chen
Bismuth oxyhalide (BiOI) has been used for photoelectrochemical catalysis in the field of catalytic hydrogen evolution, but it in a single-phase form has hardly been reported for photocatalytic hydrogen evolution reaction (PHER). Herein, we designed a W/S co-doped BiOI-based superhydrophilic catalyst with oxygen vacancy-rich defects and heterovalent valence states for efficient PHER under visible light. The W/S doping in BiOI not only adjusts the energy band structure and expands the visible light response range, but also transforms its hydrophobicity into superhydrophilicity, with which the gas bubble amount can be reduced and PHER activity enhanced. The introduction of sulfur regulates the content of oxygen vacancies which enhance the active surface sites for capturing water molecules and activating the H-O-H bond. The added tungsten exists in different valence states of W 6+ and W 5+ which is beneficial for electron hopping and PHER activity. The W/S-BiOI-3 with the suitable W/S doping content exhibits the highest visible-light PHER rate of 9.46 mmol·g −1 ·h −1 , with an apparent quantum efficiency (AQE) of 9.7 % at 420 nm. W/S-BiOI-3 shows excellent PHER activity, stability, and durability, which provides a feasible scheme for other bismuth-based halogen oxides to be used in PHER.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）