ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xin Cao,Kaifu Yu,Yang Zhang,Nan Li,Peng Wang,Li Zhou,Xiang Gong,Hongbin Wang,Fan Yang,Wenkun Zhu,Rong He
Reduction of hexavalent uranium [U(VI)] by the photocatalytic method opens up a novel way to promote the selectivity, kinetics, and capacity during uranium removal, where organic molecules act as the sacrificial agents. However, the addition of sacrificial agents can cause a secondary environmental pollution and increase the cost. Here, a UiO-66-based photocatalyst (denoted as MnOx/NH2-UiO-66) simultaneously with efficient U(VI) confinement sites and water oxidation sites was successfully developed, achieving excellent U(VI) removal without sacrificial agents. In MnOx/NH2-UiO-66, the amino groups served as efficient U(VI) confinement sites and further decreased the U(VI) reduction potential. Besides, MnOx nanoparticles separated the photogenerated electron–hole pairs and provided water oxidation sites. The U(VI) confinement sites and water oxidation sites jointly promoted the U(VI) photoreduction performance of MnOx/NH2-UiO-66, resulting in the removal ratio of MnOx/NH2-UiO-66 for U(VI) achieving 97.8% in 2 h without hole sacrifice agents. This work not only provides an effective UiO-66-based photocatalyst but also offers a strategy for effective U(VI) photoreduction.
研究领域:
环境科学
·
材料科学
·
化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qiang Zheng,Hong Liang,Ran He,Youli Yang,Kaibin Zhang
Mesoporous MnO x -Y and LnO x /MnO x ozone decomposition catalysts were prepared by calcination of Mn-BTC (BTC = 1,3,5-benzentricarboxylate) and doping of lanthanide elements (Ln = La, Ce, Sm, Eu, Er). Compared to MnO x -Y catalysts, the LnO x /MnO x catalysts showed higher ozone catalytic activity, the mutual conversion between Ln n+ and Mn n+ was helpful to improve ozone decomposition. The CeO x /MnO x catalyst showed the highest catalytic that showed 93% conversion of 40 ppm O 3 in the relative humidity (RH) = 65% after 360 min, which was attributed to the largest specific surface area, more oxygen vacancies , Mn 3+ and O ads . In addition, the CeO x /MnO x catalyst was loaded into the non-woven fabric to obtain CeO x /MnO x -NWF catalyst, which showed a highly efficient and stable ozone conversion under the RH range from less than 5%–85%. This work will promote the practical application of Mn-BTC derived catalysts.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenjie Shao,Junpeng Wang,Meiying Niu,Jun Tang,Qiuhong Pan,Ziguo He,Ping Cui,LiFeng Chen,Zhiyong Fang,Qingping Ke
The oxidative cyanation of fructose to nitriles using ammonia and oxygen over heterogeneous catalysts is still challenging due to the insufficient activation of reactants on coordination-saturated metal oxides. In this study, we have developed an acidic manganese oxide (A-MnO x ) catalyst through an anion doping strategy to enhance the aerobic ammoxidation of 5-hydroxymethylfurfural (HMF) to hydroxymethylfurfural carbonitrile (HMFC). Compared to the commercial MnO 2 , the anion doping strategy induced more coordination-unsaturated Mn and O sites on the A-MnO x catalyst. These coordination-unsaturated Mn and O sites create abundant strong Lewis acid sites, which facilitate the activation of oxygen and HMF. Consequently, the A-MnO x catalyst demonstrated remarkable performance, achieving an 88.3% yield of HMFC with an exceptional selectivity of 96.1%. This performance surpasses that of most previously reported catalysts, underscoring the efficiency of our approach. This study was further extended to such catalytic system to the synthesis of HMFC from fructose with superior catalytic performance.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xin Guo,Zhijia Sun,Hao Ge,Qin Zhao,Tingting Shang,Yang Tian,Xi-Ming Song
Nanocomposites of manganese oxides and carbonaceous materials with strong interfacial connection hold extraordinary potential as high-performance electrode materials for energy storage devices. However, the interfacial interaction between manganese oxides and carbon has not been sufficient elucidated despite it may affect the chemical composition and morphology of the electrode materials and thus impact on the electrochemical performance. Herein, through regulating the amount of oxygen-containing functional groups on the surface of multi-walled carbon nanotubes (MWCNTs), a series of MnO x /MWCNTs nanocomposites with different compositions and morphologies are successfully synthesized. The Mn–O–C bonds, which can act as an ultrafast electron transfer path, are formed in the MnO x /MWCNTs nanocomposites. The influence of the amount and type of oxygen-containing functional groups in MWCNTs on the formation of Mn–O–C bonds, the composition and morphology of the nanocomposites is revealed clearly. The nanocomposite with the highest number of Mn–O–C bonds in the prepared MnO x /MWCNTs, which feature a structure with the binary manganese oxides (38% MnO 2 and 62% Mn 3 O 4 ) nanosheets growing vertically and uniformly on the oxidized MWCNTs, give the best electrochemical properties with high capacity (1353.2 mAh g −1 at 0.1 A g −1 ), outstanding rate capability (384.9 mAh g −1 at 20 A g −1 ), and durable long-term cyclability (1000 cycles with 70% retention at 2 A g −1 ). The quantitative kinetic analysis indicates that over 60% of the charge storage is pseudocapacitive. The distinct interfacial design strategy presents a new route to synthesis transition metal oxides/carbon hybrids with efficient energy storage and conversion.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Materials Today Bio
·
2026
·
IF 10.2
Jianan Yu,Shaosheng Jia,Rongbang Sun,Tong Zhang,Xinyuan Cai,Manli Song,Lan Chen,Han Lin,Shaokang Guan
Frequent tumor recurrence and postoperative bacterial infections after osteosarcoma surgery have increased the demand for advanced bone implants. Although magnesium and its alloys are considered promising candidates for next-generation bone implants, their clinical application remains limited due to inadequate corrosion resistance. In this work, manganese oxide (MnO x ) nano-coatings with varying Mn 3+ /Mn 2+ ratios were fabricated on the surface of ZE21C alloys via heat treatment, effectively enhancing corrosion resistance. The MnO x nano-coatings consisted of multiple semiconductors with different Mn 3+ /Mn 2+ ratios, and Mn 2 O 3 with a narrower band gap became the dominant phase with heat treatment, resulting in a significant improvement in the photothermal conversion performance. In vivo and in vitro experiments demonstrated that samples with higher Mn 3+ /Mn 2+ ratios disrupted redox homeostasis, inducing lipid peroxidation of biological membranes. Additionally, valence electrons in the semiconductors could be excited by NIR irradiation to generate photogenerated carriers, forming transmembrane electron-transfer channels with adhered tumor and bacterial cells, leading to structural membrane disruption and sustained antibacterial and tumor cell ablation. Furthermore, Mg alloys modified with MnO x nano-coatings exhibited excellent biocompatibility and did not inhibit mitochondrial function of normal cells. This work provides a broader range of options and practical solutions for developing intelligent bone tissue-engineering materials for postoperative osteosarcoma.
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 4
·252
·
IF 5.4
Shi Fan,Hu Xiaojuan,Han Xiao,Li Juntong,Li Xiaojiao,Mohan Brij,Sun Wei
A freestanding manganese oxide nanoparticle–decorated laser-induced graphene electrode (MnOx-LIGE) for sensitive electrochemical detection of the organophosphate insecticide fenitrothion (FT) is reported. The electrode is fabricated via a one-step laser-engraving process on MnCl₂-doped polyimide films, enabling the simultaneous formation of porous graphene and in situ decoration with MnOx nanoparticles. Structural characterization confirms a three-dimensional porous graphene network uniformly decorated with MnOx nanoparticles, providing abundant active sites and accelerated electron transfer. Benefiting from this architecture, the MnOx-LIGE exhibits a wide linear detection range from 100.0 nmol/L to 250.0 µmol/L with a low detection limit of 13.66 nmol/L. Integrated with a portable electrochemical workstation, the sensor demonstrates excellent selectivity and stability. It achieves reliable recoveries of 102.4–104.2% in mango samples, highlighting its potential for rapid on-site monitoring of pesticide residues.
Section
Graphical
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Li Liang,Xiao Dan,Wang Ran,Xu Zunzhu,Zhang Jiwen,Jin Xiaoxian,Zou Weiwei,Lu Zhaoyang,Liu Beibei
Coating Manganese oxide (MnO x ) onto solid substrates is one of the most effective approaches for addressing the inherent agglomeration tendency of powdered MnO x in practical applications. In this study, we deposited MnO x onto activated carbon (AC) and improved the catalytic performance for formaldehyde (HCHO) removal by introducing metal platinum (Pt). When evaluated as catalysts in the HCHO catalytic reaction at ambient temperature, the obtained 0.05 wt% Pt-MnO x /AC catalyst possessed remarkable catalytic and adsorption activity and stability. It could achieve 98%HCHO removal by degrading 1.01 ppm HCHO to 0.02 ppm (0.024 mg/m 3 ) within 2 h in static test at ambient temperature. Further structure-performance investigations revealed the crucial role of metal Pt, which not only improved the oxygen activation capacity but also increased the contents of adsorbed oxygen species and enriched oxygen vacancies; therefore, key intermediates, including performic acid, formate, and CO, can be easily converted. More importantly, the deactivated catalyst regained its full activity after 6 h of air exposure, which was attributed to the rapid regeneration of surface hydroxyl groups through atmospheric O 2 and the oxidation of accumulated intermediates. This study reveals the HCHO catalytic mechanism over Pt-MnO x /AC and provides valuable insights into the design of high-activity, relatively low-cost environmental catalysts. Graphical abstract
研究领域:
环境催化
·
材料科学
·
空气污染控制
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Xiuhui Zhai,Xiang Wang,Xinle Pang,Jun Zhang,Qiong Wu,Weidan Na,Yingmei Zhou,Lin Tian
Exploiting effective and low-cost electrocatalysts toward water oxidation is of vital significance for boosting overall water splitting. Herein, we proposed a simple method for constructing dendritic N-doped carbon/ manganese oxides (N-C/MnO x ) hybrid nanocomposites by annealing the composite of nitrogen-doped carbon quantum dots (N-CQDs) and γ-MnOOH (γ-MnOOH@N-CQDs) at different temperatures under N 2 /O 2 atmosphere. The obtained N-C/MnO x exhibited remarkable electrocatalytic activity and stability for oxygen evolution reaction (OER) owing to their unique dendritic structure, rich oxygen vacancies, optimized electronic structure, abundant Mn-C/N, and large electrochemical active area. Among of the prepared N-C/MnO x hybrid nanocomposites, N-C/Mn 2 O 3 showed the best performance toward OER with an overpotential of merely 347 mV to reach to 10 mA cm −2 , along with a small Tafel slope of 75.51 mV dec −1 . More remarkably, by combining Pt/C with N-C/Mn 2 O 3 for overall water splitting, a battery voltage of only 1.67 V is needed to reach the 10 mA cm −2 , rivaling the activity of the state-of-the-art IrO 2 ‖ Pt/C couple.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Yanwei Cao,Dilong Chen,Yaowei Wang,Huibing Shi,Baolin Feng,Chungu Xia,Yuxiao Ding,Lin He
The development of new application scenarios for the red mud, a huge by-product from the aluminum manufacture, has become urgent because of the increasingly stringent demands of environmental protection. Herein, a very simple and sustainable approach to the design of a synergistic catalytic system for the direct oxidative cross-coupling of alcohols and amines to (un)symmetric imines by physically mixing MnO x and red mud is presented. With the catalysis of active red mud, the synthesis of imines over MnO x can achieve an excellent (>98%) yield at 60 °C, air as oxidant for 8 h Without this catalysis, the imine yield reaches only 25%. The red mud clearly assists the reaction, resulting in a 4 ∼ 10-folds higher increase over reactions using only MnO x . From detailed experiments and characterizations, the synergistic effects of the extraordinary performance of this catalytic system were confirmed to be a combination of the reactivity of MnO x in the oxidation of alcohols and the enhancement by the active red mud in the condensation of aldehydes and amines. This work demonstrates a facile strategy for revival of the hazardous red mud. It could turn “waste” into wealth and greatly promote the catalytic applications of red mud.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Jiayi Wu,Rui Zhang,Yuxia Wang,Kanyu Yang,Wenwen Sun,Zhong Qi,Jie He,Huayi Li,Peng Pan,Junjun Shi,Zhengchun Yang
Aqueous Zn-ion batteries (AZIBs) are a perspective energy storage technical due to their excellent safety levels while maintaining cost-effectiveness, and large theoretical specific capacity. However, the capability mismatch between cathode and anode brings the low specific capacity and unsatisfactory cycle life, which blocks the large-scale application of AZIBs for renewable energy sources and the smart grid industry. Herein, we constructed a decahedral BiVO 4 /MnO x nanosheets cathode to boost the charge/discharge performance of AZIB by a directional drive strategy. Due to the MnO x nanosheets selectivity growth on {110} facet of decahedral BiVO 4 and the laminar structure of the BiVO 4 /MnO x composite, the channels of electron transfer are established between BiVO 4 and MnO x nanosheets, which restrain the instability of manganese oxides and accelerate the insertion/extraction of Zn 2+ , and further enhance the specific capacity and cycle life of AZIB. The BiVO 4 /MnO x cathode shows a high specific capacity of 567.5 mAh g −1 and the assembled AZIB exhibits an outstanding energy density of 365.5 Wh kg −1 , superior rate performance, stable long cycle life, and superior long-cycle capability (6600 cycles at 3 A g −1 ). The above findings provide a new way for high capacity and high life cathode materials of AZIBs.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 4
·1757-1765
·
IF 4
Zheng Zhang,Lei Han,Kai Tao
Exploring non-noble metal dual-functional electrocatalysts with high activity and stability for water splitting is highly desirable. In this study, using zeolitic imidazolate framework-L (ZIF-L) nanoarrays as the precursor, manganese oxide-decorated porous nickel–cobalt phosphide nanosheet arrays have been prepared on nickel foam (denoted as MnOx/NiCoP/NF) through cation etching, phosphorization and electrodeposition, which are utilized as an efficient dual-functional electrocatalyst for overall water splitting. The hierarchical porous nanosheet arrays provide abundant active sites for the electrochemical process, while the MnOx modification induces strong interfacial interaction, benefiting charge transfer. Thus, the MnOx/NiCoP/NF exhibits excellent electrocatalytic activity toward the hydrogen evolution reaction (HER, overpotential of 93 mV at 10 mA cm−2), oxygen evolution reaction (OER, overpotential of 240 mV at 10 mA cm−2) and overall water splitting (cell voltage of 1.59 V at 10 mA cm−2). Furthermore, it shows superior stability during continuous overall water splitting for 200 h. This work provides a simple and effective approach for developing efficient non-noble metal dual-functional catalysts for overall water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2016
·Vol. 118
·期 2
·605-619
·
IF 1.265
Wang Lei,Zhang Chuanhui,Huang He,Li Xuebing,Zhang Wei,Lu Mohong,Li Mingshi
MnO
x
catalysts were contrastively prepared by an alkali-promoted redox precipitation strategy (MnO
x
-RP) and a conventional citrate sol–gel method (MnO
x
-SG), and tested for the catalytic oxidation of toluene, where MnO
x
-RP exhibited higher catalytic activity, excellent catalytic durability under dry conditions and good regeneration ability under humid conditions. The characterizations results indicated that different crystalline phases but similar textual properties (specific surface area, porosity and morphology) were observed over MnO
x
-RP and MnO
x
-SG catalysts, while MnO
x
-RP presented significantly higher low-temperature reducibility and average oxidation state of Mn as well as higher abundance of surface adsorbed oxygen species compared with MnO
x
-SG, thus beneficially resulting in its superior catalytic activity in the reaction.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）