Journal of Cleaner Production
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2021
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IF 9.297
Kai-Qiang He,Chun-Gang Yuan,Yang-Hong Jiang,Yan Li,Xue-Lei Duan,Qi Guo
Some sorbents have been developed for arsenic (As) compounds capture from flue gas . However, most of the conventional sorbents have cost constraints and can cause secondary pollution due to the leaching of arsenic after use. To solve this problem, a new and highly efficient adsorbent for gaseous arsenic was successfully developed in this paper with excellent immobilization performance and low-cost. A series of Mn-supported attapulgite (ATP) composites were fabricated, characterized, and investigated for arsenic capture. The modification of ATP with Mn not only considerably enhanced the adsorption efficiency but also stabilized the adsorbed As in the spent sorbents. SO 2 in flue gas promoted the adsorption performance through As-sulfate binding, whereas NO was beneficial for the oxidation of As(III) to As(V) on the surface of Mn-modified ATP. The incorporation of Mn with ATP generated abundant hydroxylate (OH − ) from hydration and accelerated the formation of As-sulfate compounds, which was beneficial for physical encapsulation. The results of the toxicity characteristic leaching procedure and sequential extraction test revealed that adsorbed As could be considerably immobilized by the sorbent with low leaching ability. Mn modification changed more As into inert fractions and consequently inhibited release from spent sorbents, which considerably reduced the risks of secondary pollution. The developed composite can be potentially used as a new efficient sorbent for gaseous arsenic capture in flue gas.
研究领域:
环境科学
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材料科学
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高影响因子
Small
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2016
·Vol. 12
·期 40
·5564-5571
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IF 8.315
Ming Zhong,Donghui Yang,Chenchao Xie,Zhang Zhang,Zhen Zhou,Xian-He Bu
Manganese oxides (MnO x ) are promising anode materials for lithium ion batteries, but they generally exhibit mediocre performances due to intrinsic low ionic conductivity, high polarization, and poor stability. Herein, yolk–shell nanorods comprising of nitrogen-doped carbon (N–C) coating on manganese monoxide (MnO) coupled with zinc manganate (ZnMn 2 O 4 ) nanoparticles are manufactured via one-step carbonization of α -MnO 2 /ZIF-8 precursors. When evaluated as anodes for lithium ion batteries, MnO@ZnMn 2 O 4 /N–C exhibits an reversible capacity of 803 mAh g −1 at 50 mA g −1 after 100 cycles, excellent cyclability with a capacity of 595 mAh g −1 at 1000 mAg −1 after 200 cycles, as well as better rate capability compared with those non-N–C shelled manganese oxides (MnO x ). The outstanding electrochemical performance is attributed to the unique yolk–shell nanorod structure, the coating effect of N–C and nanoscale size.
研究领域:
材料科学
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能源存储与转换
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PubMed
高影响因子
ELECTROCHIMICA ACTA
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2020
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IF 6.215
Meng Chen,Qian Cheng,Yong Qian,Jinxin He,Xia Dong
Aqueous supercapacitor with the character of cost-effective and environmental-friendly has been regarded as the promising energy storage device. However, the operating voltage of aqueous supercapacitor is usually limited by the electrochemical stability of water, which greatly hinders their application and development. Such a limitation may be surpassed by increasing the over-potential of oxygen evolution reaction and hydrogen evolution reaction. Herein, metal cation inserted MnO 2 nanosheets supported on carbon cloth substrate were prepared via electrochemical activation, which can stably work as cathode in an expended positive potential window of 0–1.3 V (vs SCE). To complement this wide potential positive electrode, K + was adsorbed onto an activated carbon cloth via electrochemical reduction method. As anode, K + adsorbed activated carbon cloth displayed extended negative potential window of −1.2-0 V (vs SCE) due to the adsorption of K + effectively prevented the hydrogen evolution reaction. A 2.5 V aqueous asymmetric supercapacitor was assemble based on Na–MnO 2 @CC cathode and KACC anode, delivering the maximum energy density of 475.7 μWh/cm 2 and power density 5 mW/cm 2 as well as exceptional cycling performance and excellent flexibility.
研究领域:
材料科学
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电化学
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储能设备
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纳米材料
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超级电容器
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Journal of Analysis and Testing
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2026
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IF 9.4
Huang Shan,Liu Xinqi,Huang Aoxiang,Zhuo Yongxiu,Huang Tiantian,Fang Yi,Wei Fuxiang,Xiao Qi
As one of the most extensively applied herbicides globally, glyphosate (GLY) is frequently detected in food and water matrices, raising substantial concerns regarding its potential harm to human health. Addressing this challenge calls for analytical platforms that offer both reliable performance and operational convenience. In this work, a GLY-responsive nanoenzyme was developed by hybridizing Zr-based metal–organic frameworks (Zr-MOF) with manganese dioxide (MnO 2 ). The system capitalizes on the strong chelation between GLY and metal centers, which destabilizes the nanozyme structure and consequently modulates its catalytic activity toward colorimetric readout. The resulting composite enables precise quantification of GLY in solution and can be readily incorporated into paper substrates to support visual, user-friendly sensing. In solution format, the assay achieves a linear response over 0.001–10 mg/mL with a limit of detection (LOD) of 0.9 μg/mL, whereas the paper-based counterpart operates within 0.05–20 mg/mL and affords an LOD of 0.03 mg/mL, making it well-suited for cost-effective field applications. Both detection formats were validated using GLY-spiked fruit and water samples. Recovery rates fell between 90.5% and 110% for the solution-based method, and between 95.3% and 105% for the paper-based strips, with relative standard deviations (RSDs) of less than 15% and 7%, respectively, indicating satisfactory accuracy and reproducibility. Overall, this work presents a versatile strategy that bridges high analytical precision with straightforward operation, meeting the demands of both routine monitoring and point-of-use testing by non-professionals.
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ACS Applied Bio Materials
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2023
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IF 4.7
Wen-Xing Zhang,Ze-Lei Zhou,Qi-Yan Lv,Xiejie Song,Junyang Chen,Chang-Bin Niu,Hui-Fang Cui
Cancer starvation/photothermal combined tumor therapy (CST/PTT) has attracted great interest attributed to their mutual compensation and synergistically enhanced effect. However, the very low O2 supply in the tumor microenvironment (TME) greatly limits the CST efficiency of glucose oxidase (GOx). Additionally, the easy degradation in blood circulation and significant off-target effects are big challenges for clinical applications of the GOx-based CST. In this study, a drug delivery system (DDS) with specific tumor-targeted GOx delivery, near-infrared (NIR) light and TME responsive O2 generation, NIR-responsive glucose consumption, high GOx loading, and efficient NIR photothermia was developed. Positively charged AuNRs@MnO2@SiO2 nanoparticles (named AMS+ NPs) were synthesized. GOx was covalently loaded with a high loading ratio of 36.0%. Finally, a thermosensitive biomimetic hybrid membrane composed of a thermosensitive lipid (TSL) membrane, red blood cell membrane (RBCM), and 4T1 cancer cell membrane (CCM) was coated on the NPs through a double-layer strategy. The AMS+-G@TSL@[RBC-CC-TSL]M NPs consumed 32.7 times glucose at 50 °C as that at 37 °C and generated 4.9 times O2 upon NIR laser irradiation. The thermosensitive biomimetic NPs showed an efficient targeting capability to the homotypic 4T1 cancer cells/tumors accompanied by good biocompatibility, macrophage evading capability, high cancer cell cytotoxicity, and excellent antitumor efficacy. The tumor growth inhibition ratio with NIR laser irradiation reached 92.8%. The AMS+-GOx@TSL@[RBC-CC-TSL]M NPs provide a smart, efficient, safe, PTT/CST combined DDS for highly efficient tumor therapy.
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高影响因子
Progress in Natural Science-Materials International
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2023
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IF 4.7
Siyi Wang,Yuxuan Bai,Zhixiong Zhang,Chengde Xie,Wenhui Song,Chen Wang,Zhuoyu Ji,Jianjun Wang
In this study, the one-dimensional nanomaterial α-MnO 2 @ZIF-8 was satisfactorily fabricated using a simple hydrothermal method by modifying ZIF-8 on α-MnO 2 nanowires for high-performance extraction of U(VI) out of water solution. The experimental data indicated that the adsorption of U(VI) on α-MnO 2 @ZIF-8 was intensely dependent on solution pH but not on ionic strength . The maximum adsorption of U(VI) on α-MnO 2 @ZIF-8 at pH = 5.0 and T = 298 K was 802.36 mg/g, substantially higher than the adsorption on α-MnO 2 (22.32 mg/g) or ZIF-8(551.31 mg/g) under the same conditions, indicating that the performance of the modified α-MnO 2 was greatly enhanced. Attaining adsorption equilibrium within 45 min, the analytical kinetic process of α-MnO 2 @ZIF-8 indicated that its adsorption on U(VI) was monolayer chemisorption . The adsorption experiments and XPS analyzed the possible adsorption mechanism of U(VI) in the reaction with α-MnO 2 @ZIF-8 during the adsorption process , namely intra-sphere surface complexation, chemisorption and electrostatic interaction . The simple preparation and high removal efficiency of α-MnO 2 @ZIF-8 indicated that this adsorbent had good prospects for application in wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Qun Yu,Yuhang Yang,Yan Xu,Yuqiao Wang,Qingdong Qin
The application of metal doping has emerged as a prominent approach for modifying transition-metal-based heterogeneous catalysts in activating peroxymonosulfate (PMS). Herein, silver-doped α-MnO 2 (Ag-α-MnO 2 ) was synthesized via a one-step hydrothermal approach and utilized for activating PMS to degrade sulfamethoxazole (SMX). The catalyst was systematically characterized and examined to determine that the efficient dispersion of Ag increased the specific surface area and pore volume of α-MnO 2 . The degradation experiments demonstrated that SMX could be efficiently degraded by a combination of PMS and Ag-α-MnO 2 within 60 min. The apparent kinetic rate constant was 0.039 min −1 , which was approximately ten times higher than that of α-MnO 2 . The impacts of external water conditions on catalytic performance and the stability of Ag-α-MnO 2 were subsequently investigated. Density functional theory calculations revealed that Ag as a crucial active center reduced the PMS adsorption energy, promoted electron transfer, and orchestrated electron distribution. EPR spectra, quenching experiments, electrochemical tests, and XPS analysis were performed to validate the radical and non-radical mechanisms, including SO 4 − , OH, O 2 − and 1 O 2 . The two redox cycles of Ag + /Ag 0 and Mn 4+ /Mn 3+ on the surface of Ag-α-MnO 2 contributed to the activation of PMS. Additionally, probable degradation pathways for SMX were presented. This study provides an initially valuable insight into the cooperative mechanism of PMS activation for SMX degradation employing Mn-based catalysts doped with precious metal silver.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yujia Yang,Huiyi Shen,Lejin Xu
This work is dedicated to achieving the high mineralization efficiency of oxytetracycline (OTC) in a dissolved oxygen (DO) activated Fenton-like system by constructing a catalyst with unique catalytic performance. Three-dimensional graphene anchored nZVI hybrid MnO 2 (3D-rGO@nZVI/MnO 2 ) with layered and porous structures was synthesized and characterized by field emission scanning electron microscopy coupled with an energy dispersive spectrometer (SEM-EDS), Brunner-Emmet-Teller (BET) analysis, X-ray diffraction (XRD) measurement and Raman spectroscopy. The experimental results showed that the removal efficiency of OTC could reach 100.0% with outstanding TOC decrease of 84.0% at natural pH in the 3D-rGO@nZVI/MnO 2 -DO system. Moreover, negligible harmful intermediates were detected by ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) after the reaction in the 3D-rGO@nZVI/MnO 2 -DO system. Reactive oxygen species (ROSs) detection, electrochemical measurements and X-ray photoelectron spectroscopy (XPS) analysis confirmed that the elimination mechanism of OTC was the unique catalytic degradation caused by the synergism of •OH and 1 O 2 . The unprecedented synchronous generation of •OH and 1 O 2 by DO activation provides an innovative strategy for further exploration of Fenton-like system toward more effective degradation of organic pollutants.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Jinhua Feng,Junxia Qi
Herein, we presented a facile synthesis of graphene oxide coated 3D bimetallic oxide MnO 2 /Bi 2 O 3 microspheres (MnO 2 /Bi 2 O 3 /GO) for voltammetric detection of cadmium ion (Cd 2+ ) in water samples. The surface morphology and crystal structure of the MnO 2 /Bi 2 O 3 /GO was measured by scanning electron microscopy and powder X-ray diffraction, respectively. The electrochemical properties of the MnO 2 /Bi 2 O 3 /GO were also measured by both cyclic voltammetry and electrochemical impedance spectroscopy . The analytical parameters such as deposition time, deposition potential and buffer pH were optimized. The MnO 2 /Bi 2 O 3 /GO composites increased the electrochemically active surface area and reduced the charge transfer resistance significantly. As a result, the MnO 2 /Bi 2 O 3 /GO decorated glassy carbon electrode (MnO 2 /Bi 2 O 3 /GO/GCE) significantly enhanced the voltammetric response for Cd 2+ detection. The optimal deposition time, deposition potential and buffer pH were set at 180 s, −1.5 V, and 6.5, respectively. Using the optimal analytical parameters, the MnO 2 /Bi 2 O 3 /GO demonstrated excellent stripping voltammetric characteristic for Cd 2+ with a wide linear response range (1.12–1120 μg L −1 ) and a quite low limit of detection (LOD, 0.22 μg L −1 ), mainly due to the synergistic effect between the bimetallic oxide MnO 2 /Bi 2 O 3 and GO nanosheets . Moreover, the MnO 2 /Bi 2 O 3 /GO/GCE exhibited extraordinary selectivity even in presence of potential interfering substances as well as good repeatability, reproducibility, and stability. The proposed MnO 2 /Bi 2 O 3 /GO/GCE was successfully used for the Cd 2+ detection in actual water samples with satisfactory recoveries (99.4% − 106%).
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高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yanli He,Shuguang Shen,Ying Wang,Chenyuan Guo,Yaping Yuan,Yaru Fan,Lili Zhang,Yuyan Song
A simple and low-cost method for the synthesis of α -MnO 2 /C catalyst was proposed, in which KMnO 4 was reduced in-situ by cellulose in urea solution. The heterogeneous catalytic degradation of urea wastewater were carried out over α -MnO 2 /C. The effect of KMnO 4 -urea solution concentration on the structure and performance of the catalysts was investigated. The results indicate that δ -MnO 2 tends to curl and collapse into tunnel structure of α -MnO 2 as the concentration of KMnO 4 -urea solution increases, leading to α -MnO 2 is evenly distributed on carbon carrier. When the concentration of KMnO 4 -urea solution is appropriate, the catalyst has not only a large specific surface area but also high oxygen vacancy density, which is the key to be able to completely degrade the urea process wastewater. The reaction kinetics show that the catalytic hydrolysis of urea behaves as a pseudo-first-order reaction. A possible catalytic mechanism of urea hydrolysis over α -MnO 2 /C was proposed. In addition, the reusability experiments show that the α -MnO 2 /C catalyst has a good recycling ability.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Simiao Zhang,Ning Zhang,Shishuang Wang,Zhenshun Li,Weiqing Sun,Mei Zhou,Yurong Zhang,Long Wu,Jing Ma
Biogenic amines (BAs) in fish or fish products may render the food toxic, which allow to be used as an indication for microbial spoilage. Thus, it is crucial to construct a rapid and sensitive analytical method for detection of BAs. In this work, based on rhodamine 6G-loaded and MnO 2 nanosheets-coated mesoporous silica nanospheres (MSNs), a highly sensitive fluorescence probe was designed and developed. Wherein, a “signal on” fluorescence was achieved by using R6G (λ emi : 553 nm) as an energy donor and MnO 2 nanosheets as the energy acceptor. As BAs exist, diamine oxidase will catalyze BAs to generate hydrogen peroxide (H 2 O 2 ), which can reduce MnO 2 to Mn 2+ , resulting with the dissociation of MnO 2 nanosheets and the signal recovery of R6G. Under optimal conditions, the analytical method obtained a wide linear detection range of 10 ∼ 400 nM with a detection limit of 5.97 nM (S/N = 3, n = 3). As a proof-of-application study, the analytical method was verified by spiked fish samples with recoveries of 93.97 to 101.57 % and was accurate at 95 % confidence level, indicating its good performance in detection of BAs and promising applications in food safety.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Miao Sun,Guochen Ji,Junping Zheng
Aqueous zinc ion batteries (AZIBs) have been regarded as promising energy storage devices owing to high safety and abundant resources. However, it still remains a great challenge to solve the issue of Zn dendrites. So far, some efforts have been made to inhibit dendrites using hydrogels as electrolytes. Nevertheless, it’s more challenging to improve ionic conductivity of hydrogel electrolyte to ensure it’s high enough to provide an environment for rapid transmission of Zn 2+ . Therefore, new strategies that can simultaneously solve above problems must be explored. Herein, a semi -interpenetrating network P(PEGMEA-AM)/PAM hydrogel electrolyte ( s -PPMHE) with molecular chain designability was innovatively constructed. Abundant functional C-O-C groups in linear polymer chain of s -PPMHE can reduce the electrostatic potential of hydrated Zn 2+ and release trapped Zn 2+ , thus significantly accelerating Zn 2+ migration with an ultrahigh transference number ( t Zn 2 + = 0.82). Thanks to the unique structural design, s -PPMHE has good mechanical stability and coordination ability with Zn 2+ , which is conducive to constructing ion migration channels and immobilizing water molecules, thus alleviating water-related parasitic reactions. The theoretical calculation results reveal that s -PPMHE can regulate Zn 2+ electric field distribution and boost desolvation kinetics. Therefore, the Zn|| s -PPMHE||MnO 2 cells exhibit excellent electrochemical performance involving high average coulombic efficiency of 98.9% and ultrahigh specific capacity of ∼ 300 mAh/g at 0.05C (97% of theoretical capacity). Furthermore, s -PPMHE delivers excellent ionic conductivity of 82.65 mS/cm and over 350 h zinc stripping/plating cycling properties. Moreover, the flexible pouch AZIBs based on s -PPMHE show stable voltage under different conditions. This work provides a novel and exploratory strategy for design of hydrogel electrolyte at molecular chain level, and opens up a new avenue to design functional hydrogel matrix for high-performance electrochemical devices.
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危险品化学品经营许可证（带存储）