CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Zhixiang Meng,Meiling Wang,Xun Cao,Tian Wang,Yongchao Wang,Yike Xu,Weifeng Liu,Lin Chen,Yizhong Huang,Xuguang Liu
Li + ion-sieve (LIS) films, foams, or granules have been fabricated to immobilize LIS to overcome powder loss for Li extraction from seawater. However, the practical application is still restricted by their low swelling ability and poor flexibility to withstand harsh marine environment for a long time. Here, a highly elastic interconnected porous LIS nanocomposite hydrogel with tunable pore structure and flexibility, as well as good swelling property, is prepared by using LIS (viz. λ-MnO 2 ) as a pore self-modifier during the in-situ fabrication of polypyrrole (PPy) and polyvinyl alcohol (PVA) interpenetrating hydrogel (denoted as λ-MnO 2 @IG). In addition to physical confinement interactions, the strong coordination/chelation and electrostatic interactions between λ-MnO 2 nanoparticles and polymer chains enable well-dispersed λ-MnO 2 nanoparticles to be confined in a rich network structure. Even at a marine environment (pH 8.3), the λ-MnO 2 @IG hydrogel exhibits superior Li + adsorption performance (20.6 mg g −1 HMO), outperforming most adsorbents containing LIS. Specially, the porous hydrogel is easily recyclable and exhibits super-stable cyclic Li extraction performance, which are directly attributable to the further-improved pore structure in continuous regeneration process. This study provides a self-regulating strategy to design LIS porous hydrogels with controllable porosity, high flexibility, good swelling ability, and excellent cycle stability to address the growing Li + demanding challenges.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2018
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IF 5.123
Yushen Liu,Juan Wang,Chao Zhao,Xiaoxiao Guo,Xiuling Song,Wei Zhao,Sijie Liu,Kun Xu,Juan Li
Listeria monocytogenes ( L. monocytogenes ) is one of the most common food-borne pathogens . The authors describe a sensitive and reliable multicolorimetric assay for L. monocytogenes using a sensing system based on TMB 2+ etching of gold nanorods . Apt-MNP was used as the capture probe, and IgY-BSA-MnO 2 NPs was chosen as an oxidase-like nano-artificial enzyme to oxidize TMB to generate TMB 2+ . Under the optimized conditions, the longitudinal shift of localized surface plasmon resonances had a linear correlation with the L. m onoc ytogenes concentration in the range between 10 to 10 6 cfu mL −1 . Meanwhile, the sensing system can generate vivid color responses as colorful as a rainbow, and the limit of detection is as low as 10 cfu mL −1 at a glance. Recoveries ranging from 97.4 to 101.3% are found when analyzing spiked food samples without pre-enrichment. In our perception, it shows promise in rapid instrumental and on-site visual detection of L. monocytogenes .
研究领域:
微生物学
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纳米技术
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食品安全
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Jingwen Han,Jiamin Ye,Jiacheng Shi,Yueyue Fan,Xue Yuan,Ruiyan Li,Gaoli Niu,Muhammad Abubakar,Yong Kang,Xiaoyuan Ji
Given the unique anatomy and location of inflammatory bowel disease (IBD), oral pharmacological treatment is the mainstay for managing IBD because of its convenience and direct accessibility to the gastrointestinal tract. However, efficient delivery systems must be designed to navigate the harsh gastrointestinal environment during application. Here, an innovative oral drug delivery system was proposed using nanomotor (NM)-loaded soluble microcapsules for treating IBD. MnO 2 -Au-mSiO 2 NMs incorporate partially encapsulated MnO 2 antennas that convert reactive oxygen species into oxygen, autonomously propelling the NMs. Astaxanthin (AST), known for its anti-inflammatory properties, is loaded into the mesoporous silica (mSiO 2 ) of NMs (AST@NMs). AST effectively reduces inflammation and shifts macrophages from a proinflammatory (M1) phenotype to an anti-inflammatory (M2) phenotype. To protect the nanomotors from harsh digestive conditions and achieve intestinal-responsive release, using photocurable 3D printing, we fabricated enteric-coated oral microcapsules (MCs). Additionally, to prevent leakage of AST@NMs, a calcium alginate shell was cured in situ on the surface of the microcapsules (AST@NMs@MCs). In vitro and in vivo, AST@NMs@MCs effectively reduced inflammation, repaired the intestinal barrier, and modulated the gut microbiota. These findings underscore the protective effects of the microcapsules on AST@NM, highlighting their potential as a promising strategy for treating colitis.
研究领域:
药学
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纳米技术
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生物医学工程
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胃肠病学
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药物递送系统
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Di Wu,Yilin Wang,Zhifang Liu,Caiyu Ge,Jiejun Li,Xinyi Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
Rifampicin (RFP) is an emerging environmental pollutant that exists in natural waters due to discharged from the medical and pharmaceutical industries, posing potential risks to aquatic life and human health. Developing highly sensitive detection techniques for RFP is essential for environmental monitoring and public health protection. In this work, Mn 2 O@Zn-NC was synthesized using in-situ growth and pyrolysis methods. Rod-like MnO 2 providing dispersed sites for the growth and crystallization of dodecahedral ZIF-8,with dodecahedral ZIF-8 tightly encapsulates MnO 2 . Additionally, the Zn-NC formed after high-temperature treatment effectively addresses the issue of poor conductivity in MnO 2 , which is conducive to the accurate display of RFP current signals. Using material of Mn 2 O@Zn-NC, a high-sensitivity electrochemical sensor was developed with a detection range of 0.040–100 µM and a limit of detection of 25 nM. This highly sensitive sensor can accurately detect RFP in environmental samples, with results comparable to those obtained using UV-Vis spectroscopy. This breakthrough electrochemical detector provides valuable opportunities for creating smart, efficient, and portable monitoring solutions.
研究领域:
环境科学
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分析化学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuning Sun,Yuexin Liu,Zhongqiang Wang,Xiaoli Zhao,Kefeng Cai
The increasing demand for flexible and wearable electronic devices has led to widespread interest in flexible electrochemical energy storage devices. However, the transformation of the battery structure from conventional to flexible presents a great challenge to the battery design. Herein, we developed a facile method for the preparation of a self-supporting composite film consisting of oxygen-vacancy rich MnO 2 nanowires (NWs), few-layer graphite nanosheets (FLGs), and single-walled carbon nanotube (SWNT) bundles as the cathode of flexible zinc-ion batteries. This ternary interwoven interconnection 3D structure enhances the electrochemical performance of the battery and realizes fast charge transfer; oxygen vacancies in the MnO 2 NWs caused by heat treatment (300 °C in Ar) allow for rapid intercalation and diffusion of Zn 2+ . The interwoven FLGs and SWNT bundles improve the electrical conductivity, and the robust interactions between the two carbon nanomaterials and the MnO 2 NWs effectively make the composite film with excellent mechanical properties. This self-supporting flexible electrode exhibits a high specific capacity of 374 mAh/g at 0.4 A/g, maintains a Coulombic efficiency of ∼ 100 % after 1600 cycles at 2 A/g, and has a high energy density of 651.5 Wh kg −1 at 65.2 W kg −1 . Moreover, the flexible zinc ion batteries assembled with the electrode demonstrate good mechanical properties and a high reversible specific capacity of 343 mAh/g after 75 bending cycles. Based on these findings, we believe that this composite film holds great promise as a cathode material in flexible energy storage applications.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2026
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IF 6.9
Xilin Wang,Boxiang Zhang,Longfei Xia,Ping Dai,Yuqing Zhao,Liang Zhou,Dongyan Xu
Background Red mud is the world’s most extensively generated waste in the non-ferrous metal industry, posing significant environmental risks due to its strong alkalinity and lack of effective disposal methods. It is urgent to find a reasonable and effective strategy to transform red mud into a Heterogeneous catalyst for environmental remediation. Methods α-MnO 2 nanorods were anchored on biochar-modified red mud composite (RMBC) via the hydrothermal method and utilized as a catalyst to activate PMS for the degradation of Rhodamine B (RhB). Reactive oxygen species generated during the catalytic process was identified through EPR, XPS, and Raman spectroscopy measurements. Degradation intermediates of RhB were identified using LC-MS. Furthermore, the ecotoxicity of RhB and its transformation products was evaluated using the ecological structure-activity relationship (ECOSAR) prediction model. Significant findings The as-prepared α-MnO 2 /RMBC achieves a remarkable RhB degradation efficiency of 98.6 % within 30 min, significantly outperforming control samples including α-MnO 2 /RM, α-MnO 2 /BC, and the mixture of α-MnO 2 /RM and α-MnO 2 /BC, suggesting a pronounced synergistic interaction between α-MnO 2 and RMBC. Mechanistic analysis reveals that RhB degradation is predominantly governed by an activated surface-PMS inner-sphere complex, signified as Mn III (s) -(O)OSO– 3. Furthermore, the Fe II species inherent to RM facilitates the redox-mediated reduction of Mn IV to Mn III , thereby sustaining the catalytic activity of active Mn III sites and enabling robust recyclability and reusability of the α-MnO 2 /RMBC catalyst.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Jianghua Du,Yufei Li,Tingting Yang,Liwei Lu,Qiang Gao
CTAB-assisted synthesis and 300 ℃ calcination prepare defect-rich α-MnO 2 catalysts. • Defects efficiently boost room-temperature formaldehyde oxidation activity. • The MvK mechanism of dynamic oxygen evolution is elucidated. A cationic surfactant-assisted controlled calcination strategy was developed for the synthesis of oxygen-vacancy-rich MnO 2 catalysts for efficient room-temperature formaldehyde oxidation. By using cetyltrimethylammonium bromide (CTAB) as a structure-directing agent followed by optimized calcination at 300℃, the synthesized MnO 2 catalyst (denoted as M-C-300) exhibits efficient room-temperature activity for formaldehyde oxidation (95.93% conversion in 120 min) and excellent reusability. Comprehensive characterization and theoretical calculations indicate that the CTAB-assisted calcination strategy effectively regulates the morphology and surface chemistry of MnO 2 . CTAB induction reduces the average particle size from 64 nm to 41 nm, while controlled calcination at 300℃ enriches defect-associated surface oxygen species and promotes oxygen activation. The combined XPS and Raman results provide indirect evidence for defect-rich surface environments, including enhanced surface active oxygen species and defect-related lattice disorder. These defect-associated sites and active oxygen species facilitate oxygen activation and formaldehyde adsorption/dissociation, thereby contributing to the high catalytic efficiency. Download: Download high-res image (203KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2025
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IF 6.5
Jinying Yu,Xiunan Cai,Xintao Zhou,Zhongqiu Luo,Fuzheng Fu,Chaochao Lai,Yanjuan Zhang,Zuqiang Huang
Efficient charge separation and controlled generation of superoxide radicals (•O 2 − ) are critical for enhancing photocatalytic activity and selectivity in the oxidation of 5-hydroxymethylfurfural (HMF) to 5-formyl-2-furancarboxylic acid (FFCA). Herein, a crystalline-amorphous S-scheme heterojunction (A-MnO 2 /B-CN) was engineered through in situ hydrothermal growth of oxygen vacancy-rich amorphous manganese dioxide (A-MnO 2 ) nanoflowers on boron-doped tubular g-C 3 N 4 (B-CN). This unique crystalline-amorphous interface establishes a strong internal electric field (IEF) that drives directional charge transfer from A-MnO 2 to B-CN. Concurrently, topological disorder within the A-MnO 2 lattice promotes dynamic O 2 adsorption and generates a robust dipole field (DF), which steers photogenerated electrons toward active sites. These dual-fields synergistically promote S-scheme charge transfer, selectively enriching •O 2 − species and suppressing •OH byproducts. Crucially, atomic-scale reconstruction at crystalline-amorphous boundaries triggers Mn 3d-O 2p orbital hybridization, reducing the rate-determining step energy barrier by 41 %. Under visible light, the system achieves near-complete HMF conversion (99.04 %) with exceptional FFCA selectivity (95.67 %) and a record production rate of 157.9 µmol·g −1 ·h −1 (3.9-fold improvement over the crystalline MnO 2 /B-CN system). This work establishes a sustainable photocatalyst design paradigm that integrates amorphous-phase defect engineering with interfacial electric field control for efficient solar-driven valorization of biomass into value-added chemicals.
研究领域:
光催化
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材料科学
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环境化学
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可再生能源
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化学工程
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纳米技术
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可持续化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Ze Zhang,Jiajun Lin,Mengwei Guo,Hangrui Zhang,Mingyuan Gao,Rongrong Deng,Cunying Xu,Qibo Zhang
Lead–silver (Pb–Ag) anodes in the zinc electrowinning industry face severe challenges of electrochemical corrosion and sluggish oxygen evolution reaction (OER) kinetics. Precoating a protective MnO2 layer is an effective strategy to enhance their performance. However, conventional MnO2 precoating processes require high temperatures (≥80 °C) and suffer from drawbacks such as poor coverage, loose structure, and insufficient active sites. This study proposes a novel low-temperature MnO2 coating strategy tuned by K+ intercalation, enabling the controllable fabrication of high-performance MnO2 coatings from zinc electrowinning waste electrolytes. The results reveal that introducing an appropriate amount of K+ modulates the redox behavior of Mn2+ and the electrochemical crystallization process, leading to the formation of a uniform MnO2 film on the Pb–Ag anode. The intercalation of K+ into the MnO2 lattice promotes the generation of abundant surface vacancies, which enhance the OER performance. This work presents a scalable solution for low-temperature coating of MnO2 film on Pb–Ag anodes, enabling efficient and clean zinc electrowinning, and opens a new avenue for designing energy-efficient MnO2-based anode materials through additive intercalation tuning.
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2018
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IF 5.116
Dong Li,Tianyi Sun,Lu Wang,Na Wang
To improve the electro-catalytic degradation efficiency of the cathode in electrochemical advanced oxidation processes , MnO 2 modified Nano-graphite (MnO 2 /Nano-G) and Pd loaded Foam-Ni (Foam-Ni/Pd) composites were prepared by the chemical redox and electro-deposition methods, respectively, and a two-layer type MnO 2 /Nano-G|Foam-Ni/Pd composite cathode was prepared with the chitosan as a binder. The composites were characterized by X-ray diffraction, scanning electrons microscopy and X-ray photoelectron spectroscopy. Results showed that the mix-crystal structural MnO 2 (α-MnO 2 and γ-MnO 2 ) nanorods with length of 80–200 nm and width of 20–50 nm were uniformly loaded on the Nano-G surface, and the three-dimensional Pd° metal trees/crystals were tightly deposited on the Foam-Ni substrate. The as-prepared cathode was applied to the electro-catalytic degradation of phenol wastewater, and the reaction parameters were optimized. Compared with MnO 2 /Nano-G|Foam-Ni and Nano-G|Foam-Ni cathodes, the degradation efficiency of phenol by MnO 2 /Nano-G|Foam-Ni/Pd cathode was significantly improved. The removal efficiencies of phenol and total organic carbon (TOC) by MnO 2 /Nano-G|Foam-Ni/Pd cathode reached 98.7% and 85.3% after 120 min electrolysis under oxygen aeration condition, respectively. The optimal reaction parameters were current density of 39 mA cm −2 , electrolyte (Na 2 SO 4 ) concentration of 0.1 mol L −1 , electrode distance of 4 cm and initial pH of 7. By determining the variations of H 2 O 2 and OH content in the cathode chamber, it was found that Pd metal crystals improved the reduction of O 2 to H 2 O 2 and MnO 2 nanorods accelerated the dissociation of H 2 O 2 to OH, producing more H 2 O 2 and OH to oxidize phenol and eliminate TOC in wastewater. The results in this study provide useful information for the control of refractory organic pollutants with electrochemical advanced oxidation in wastewater treatment .
研究领域:
环境科学
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电化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Yafen Zhou,Lei Xu,Guofang Zhang
Photocatalysts UiO-66-(OH) 2 /MnO 2 -TiO 2 with intimate contact interfaces were successfully synthesized by impregnation methods and all of the composites were characterized by a variety of analytical techniques. The results indicated that MnO 2 and TiO 2 form a heterojunction and tightly attached to the surface of UiO-66-(OH) 2 , the generation of MnO 2 -TiO 2 heterojunction improved the catalyst electron-hole separation efficiency, and there was a strong electronic interaction between MnO 2 -TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , and efficient interfacial charge transfer between UiO-66-(OH) 2 and MnO 2 -TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. Meanwhile, the hydroxyl radicals (·OH) and superoxide radicals (·O 2 - ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 70UO/MnO 2 -TiO 2 (1 g 0.15 m 3 ) in self-made closed system under high pressure mercury lamp irradiation is 88.19 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 95.19 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst.
研究领域:
环境科学
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材料科学
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催化
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Yuze Zhou,Guang Yang,Yumeng Wang,Jiaying Lei,Tengling Ye,Ruipeng Huang,Shaohao Zhan,Dongyan Tang
To address oily wastewater pollution, a dual-responsive composite membrane with switchable superwettability was fabricated by in situ growth of MnO 2 microflowers on carbon fiber cloth (CFC), followed by coordination-driven self-assembly of catechol-functionalized poly(N-isopropylacrylamide) (PNIPAM). The abundant oxygen vacancies (O v ) on MnO 2 microflowers enhanced photothermal conversion efficiency (24.99% for optimal MC 4 ) and provided active sites for robust PNIPAM anchoring via C-O-Mn coordination bonds. The resulting membrane (PMC) exhibited switchable superwettability: underwater superoleophobicity (150.10°) at 25 o C and underoil superhydrophobicity (150.27°) at 45 o C under heating or NIR irradiation. This enabled efficient separation of diverse oily pollutants, including light/heavy oil-water mixtures and emulsions, with high separation efficiency (> 99.5% for mixtures, > 99.2% for emulsions) and exceptional water flux (25239.89 L m −2 h −1 ). Taking advantages of the in situ grown of MnO 2 on CFC and strong chemical anchoring of PNIPAM on MnO 2 , the photo and thermal dual-responsive PMC membrane maintained excellent stability after mechanical (rubbing, bending, soaking) and chemical (acid/alkaline/saline) challenges, demonstrating superior reusability and durability for practical water purification applications.
研究领域:
材料科学
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化学工程
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环境科学
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纳米技术
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高分子科学
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表面工程
✓ 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）