CHEMOSPHERE
·
2022
·
IF 8.943
Runyu Zhou,Gaofeng Zhou,Yiqing Liu,Shenglan Liu,Shixiang Wang,Yongsheng Fu
In this study, a novel peracetic acid (PAA)-based advanced oxidation process using Mn 3 O 4 as a catalyst was proposed. A thorough sulfamethoxazole (SMX) removal could be achieved within 12 min in Mn 3 O 4 /PAA system at neutral pH. The characterization results of fresh and used Mn 3 O 4 suggested that ≡Mn(II), ≡Mn(III) and ≡Mn(IV) on Mn 3 O 4 were the Mn species for PAA activation , constituting the redox cycles of ≡Mn(II)/≡Mn(III) and ≡Mn(III)/≡Mn(IV) simultaneously. Organic radicals (i.e., CH 3 C(O)O • and CH 3 C(O)OO • ) were verified to be the dominant reactive species responsible for SMX degradation in Mn 3 O 4 /PAA system by radical scavenging experiments. The neutral condition was the most favorable pH for SMX removal in Mn 3 O 4 /PAA system and the increase of PAA or Mn 3 O 4 dosage could enhance SMX degradation. Presence of HCO 3 − and natural organic matter (NOM) could inhibit SMX degradation, while Cl − , NO 3 − and SO 4 2− had a negligible effect on SMX removal. The thorough SMX removal in successive experiments and characterization results of used Mn 3 O 4 suggested the good reusability and stability of Mn 3 O 4 for PAA activation. Based on six detected transformation products of SMX, hydroxylation, nitration, bond cleavage and coupling reaction were proposed to be its degradation pathways in Mn 3 O 4 /PAA system.
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Yiling He,Ming Gao,Yanbo Zhou,Yi Zhou
Antibiotic abuse will seriously affect the ecology and environment. Photocatalytic oxidation technology based on carbon nitride (g-C 3 N 4 ) has been widely adopted to treat wastewater containing antibiotics. Here, a novel composite photocatalyst MCNT was prepared by loading manganese oxide (Mn 3 O 4 ) on the surface of g-C 3 N 4 nanotubes (CNT). Three typical antibiotics, trimethoprim (TMP), norfloxacin (NOR), and tetracycline (TC) were used as model contaminants to evaluate the oxidative properties of prepared materials. Compared with bulk g-C 3 N 4 , the degradation rates of TMP, NOR, and TC catalyzed by MCNT-5 were increased by 2, 3, and 1.4 times, respectively, mainly due to 1) the larger specific surface area of the nanotube structure of CNT, which provides abundant active sites for antibiotic adsorption and catalytic oxidation, and 2) the loading of Mn 3 O 4 , which promotes the directional migration of photogenerated charges and improves the separation efficiency of photogenerated electrons and holes. The free radical capture and quenching experiments confirmed that MCNT degraded the target organic pollutants with hydroxyl radical (·OH) and singlet oxygen ( 1 O 2 ) as the main active oxidants. This catalyst maintained 80% photocatalytic oxidation performance after five cyclic experiments. This study provides new insights into developing efficient, stable, and environmentally-friendly photocatalysts and provides a new dimension to mitigate the antibiotic pollution problem.
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
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Weinan Sun,Qin Wang,Dehui Zhang,Lu Yin,Yuwei Chen,Xinzhou Zhang,Hao Liu,Liping Sun
A folate-targeted Mn 3 O 4 nanoplatform was developed for cisplatin-induced AKI. • The platform combined ROS scavenging with localized rapamycin delivery. • FA modification enhanced tubular cell uptake via an FR-associated mechanism. • RAP@Mn 3 O 4 -FA promoted AMPK/mTOR-associated autophagic flux. • Treatment improved renal function and showed progressive clearance within 120 h. Acute kidney injury (AKI) is a critical clinical syndrome characterized by an abrupt decline in renal function and is associated with substantial morbidity and mortality. Current therapeutic options remain predominantly supportive. Cisplatin-induced AKI, a clinically relevant subtype of AKI, is driven by oxidative stress, mitochondrial dysfunction, inflammatory activation, and tubular epithelial cell injury. Rapamycin, a potent mechanistic target of rapamycin (mTOR) inhibitor, has shown renoprotective potential in preclinical AKI models; however, its therapeutic application is limited by poor renal accumulation, low aqueous solubility, a narrow therapeutic window, and potential systemic toxicity. To address these limitations, a kidney-targeted nanotherapeutic was engineered by loading rapamycin onto ultrasmall manganese oxide (Mn 3 O 4 ) nanoparticles surface-functionalized with folic acid (RAP@Mn 3 O 4 -FA). This nanoplatform integrates the intrinsic ROS-scavenging activity of Mn 3 O 4 with folate receptor (FR)-mediated renal targeting, thereby enhancing intrarenal drug delivery while reducing off-target exposure. In a cisplatin-induced AKI mouse model, RAP@Mn 3 O 4 -FA improved renal function, attenuated histological injury, activated AMPK/mTOR-associated autophagy, and showed a favorable preliminary biosafety profile. These findings suggest that RAP@Mn 3 O 4 -FA is a promising kidney-targeted nanotherapeutic candidate for cisplatin-induced AKI treatment.
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高影响因子
ACS Omega
·
2026
·
IF 5.2
Zhao Haoyue,Wang Weixin,Zhao Yadong,Bao Di,Dong Jingxuan,Shen Shukun,Chen Jian-Gang,Hu Daodao,Parikh Atul
There is a growing interest in the design and construction
of artificial
oxygen evolution center (OEC) materials for solar energy utilization
and conversion. Inspired by the natural structure of thylakoid photosystem
II (PS II) membrane, we present herein a hybrid photocatalytic semiconductor
substrate Mn 3 O 4 /TiO 2 supported chlorophyll a -phospholipid bilayer (CPB) for light harvesting and oxygen
releasing. Our design spreads a lipid bilayer containing light-harvesting
pigments onto the surface of a semiconductor substrate via the emerging
solvent-assisted lipid bilayer (SALB) method. The Clark oxygen electrode
measured the photoelectron transfer efficiency of Mn 3 O 4 /TiO 2 @CPB. Its excellent light-harvesting and oxygen
production performance was greatly accelerated because Mn 3 O 4 /TiO 2 exported high-energy electrons in excited
states and suppressed the recombination of photogenerated electrons
and holes of chlorophyll, accelerating the photoelectron transfer
efficiency of chlorophyll in the phospholipid bilayer. Moreover, the
effect of chlorophyll content, composite semiconductor matrix, and
lateral liquidity of phospholipid bilayer on the photoelectron transfer
performance was systematically studied. Several characterization methods
were used in combination, including differential scanning calorimeter
(DSC) analysis, 1,6-diphenyl-1,3,5-hexanotriene (DPH) fluorescence
anisotropy spectra, and fluorescence quenching technique. It was observed
that the lateral liquidity of the phospholipid bilayer is distinctly
affected by the amount of chlorophyll and temperature, and the membrane
fluidity reaches its maximum when n Chla : n Lecithin is 1:20 at 30 ° C, and
low and high temperatures actually cause a decrease in the photoactivity
of the material. The combination of Mn 3 O 4 /TiO 2 and chlorophyll a -phospholipid bilayer (CPB)
not only broadens the light absorption region and prolongs their lifetime
but also effectively reduces the transmission barriers of photogenerated
electrons by constructing a tight interface contact.
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Yu Liang,Yangshuo Liu,Liang Qiao,Jiehe Sui,Wei Cai,Xiaohang Zheng
Abstract Vacancy engineering can enhance Mn-based electrocatalysts, yet in seawater, vacancies often promote Cl– adsorption, metal leaching, and stability loss. Here, we report a dynamic vacancy self-stabilization strategy for sulfur-modified Mn3O4 (S-Mn3O4-E), in which lattice-sulfur oxidation and leaching generate sulfur vacancies together with a sulfate-rich interface, while maintaining high oxygen evolution reaction (OER) activity. Theoretical calculations show that surface sulfate increases the Cl– adsorption energy and induces interfacial electron accumulation, thereby suppressing chloride adsorption, whereas sulfur vacancies regulate the electronic structure and optimize the adsorption energetics of OER intermediates. The optimized S-Mn3O4-E catalyst requires an overpotential of only 221 mV at 10 mA cm–2 in alkaline simulated seawater and sustains continuous operation for 1000 h with a low voltage decay rate of 0.033 mV h–1. This work establishes a rational defect-stabilization approach for the design of active and durable seawater OER catalysts.
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高影响因子
Toxics
·
2024
·Vol. 12
·期 1
·72
·
IF 3.9
Deyun Li,Yongtao Li,Shuran He,Tian Hu,Hanhao Li,Jinjin Wang,Zhen Zhang,Yulong Zhang
Argillaceous limestone (AL) is comprised of carbonate minerals and clay minerals and is widely distributed throughout the Earth’s crust. However, owing to its low surface area and poorly active sites, AL has been largely neglected. Herein, manganic manganous oxide (Mn3O4) was used to modify AL by an in-situ deposition strategy through manganese chloride and alkali stepwise treatment to improve the surface area of AL and enable its utilization as an efficient adsorbent for heavy metals removal. The surface area and cation exchange capacity (CEC) were enhanced from 3.49 to 24.5 m2/g and 5.87 to 31.5 cmoL(+)/kg with modification, respectively. The maximum adsorption capacities of lead (Pb2+), copper (Cu2+), and nickel (Ni2+) ions on Mn3O4-modified argillaceous limestone (Mn3O4–AL) in mono-metal systems were 148.73, 41.30, and 60.87 mg/g, respectively. In addition, the adsorption selectivity in multi-metal systems was Pb2+> Cu2+> Ni2+in order. The adsorption process conforms to the pseudo-second-order model. In the multi-metal system, the adsorption reaches equilibrium at about 360 min. The adsorption mechanisms may involve ion exchange, precipitation, electrostatic interaction, and complexation by hydroxyl groups. These results demonstrate that Mn3O4modification realized argillaceous limestone resourcization as an ideal adsorbent. Mn3O4-modified argillaceous limestone was promising for heavy metal-polluted water and soil treatment.Keywords:manganese oxides;argillaceous limestone;adsorption mechanism;heavy metal;competitive adsorption
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Ning Li,Mengting He,Xukai Lu,Lan Liang,Rui Li,Beibei Yan,Guanyi Chen
A valence-state heterojunction Mn 3 O 4 /γ-MnOOH was synthesized for norfloxacin (NOR) degradation under concurrent visible light and magnetic field. The charge carriers could transfer between the valence state components facilely, inhibiting recombination of photo-induced electron-holes significantly. Efficient NOR degradation by Mn 3 O 4 /γ-MnOOH was realized at 98.8% (rate constant of 0.0720 min −1 ) within 60 min under magnetic field assisted visible light. In neutral media, the positively charged NOR and negatively charged Mn 3 O 4 /γ-MnOOH would arrange in an oriented manner in the presence of magnetic field, providing more active sites for NOR during photocatalysis . Moreover, the opposite Lorentz forces contributed to the attractive interactions between NOR and Mn 3 O 4 /γ-MnOOH, accelerating NOR degradation with lower active energy. Quenching experiment showed that ∙O 2 − and h + played dominant roles in NOR degradation. Attractively, this study shed new lights on an innovative strategy of magnetic field assisted photocatalysis for refractory contaminants remediation from water.
研究领域:
环境科学
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材料科学
·
光催化技术
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Cuiyin Liu,Yanfeng Chen,Xian Sun,Biyu Chen,Yue Situ,Hong Huang
A phase transition from spinel Mn 3 O 4 to layered birnessite has been reported through electrochemically induced activation in aqueous electrolyte for high performance supercapacitor , battery and water splitting applications. Here, Li 2 SO 4 , MgSO 4 and K 2 SO 4 aqueous electrolytes were used for the activation of Mn 3 O 4 electrode to investigate the effect of electrolyte cation on the electrochemical activation. The Mn 3 O 4 electrode exhibited different activated results in the three electrolytes, including the efficiency of phase transition, morphology of resulting birnessite and capacitive performance of the activated electrode. The cations affect the proceeding of H + insertion or the peeling-off of birnessite nanosheets during the phase transition process, resulting in the formation of nanosheet materials with different lateral dimensions. Effect of electrolyte cation on the electrochemical behavior of nanosheets electrode is further investigated. The nanosheets electrode activated in K 2 SO 4 exhibits capable capacitive behavior with reasonable specific capacitance and cycling stability. Understanding how different cations affect the phase transition of Mn 3 O 4 together with its capacitive performance will conduce to the development of manganese oxide electrode systems with high performance.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Yu-zhi Su,Qi-zhi Xu,Qi-sui Zhong,Chan-juan Zhang,Shu-ting Shi,Chang-wei Xu
Glycerol has a very high value of onset potential on the Au/C electrode, so it is difficult to be electrochemically oxidized on the pure Au electrocatalyst. When Co 3 O 4 , NiO, Mn 3 O 4 and MgO are added to the Au/C, the values of onset potential of glycerol oxidation shift negatively 171, 191, 156 and 215 mV than that on the Au/C. Au–Co 3 O 4 (wt 4:1)/C, Au–NiO(wt 5:1)/C, Au–Mn 3 O 4 (wt 5:1)/C and Au–MgO(wt 2:1)/C show the highest activity for glycerol electrooxidation for respective oxide promoted Au/C. The addition of oxides to the Au/C obviously promotes the catalytic activity and stability for glycerol electrooxidation.
研究领域:
电化学
·
催化材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Wen Li,Aizhen Xu,Yu Zhang,Yan Yu,Zhihua Liu,Yujun Qin
Metal oxide derived from metal-organic framework (MOF) could possess unique architecture and special properties. In this work, hierarchically nanostructured Mn 3 O 4 is synthesized from the thermal annealing of manganese-1,3,5-benzenetricarboxylate (Mn-BTC) MOF with the presence of reduced graphene oxide (rGO) to yield rGO/Mn 3 O 4 composite for the high-performance supercapacitor electrode material. The porous rGO aerogel is prepared from the hydrothermal and freeze-drying processes. The effective combination of Mn-BTC and rGO aerogel is realized through a facile ball-milling method that endows Mn-BTC with a rod-like structure in the composite. Upon annealing, the Mn-BTC-derived Mn 3 O 4 presents the unique structure of porous rods comprising nanoparticles in the resulting rGO/Mn 3 O 4 composite. The optimized rGO/Mn 3 O 4 /Ni foam electrode achieves a specific capacitance of 420 F g −1 at 0.5 A g −1 and a superior cycling property. The assembled all-solid-state symmetric supercapacitor based on rGO/Mn 3 O 4 composite delivers the energy density of 22.1 Wh kg −1 and power density of 3.0 kW kg −1 . The excellent capacitive performance of the rGO/Mn 3 O 4 electrode could be ascribed to the effective integration of Mn-BTC-derived manganese oxides with hierarchical structure and the rGO matrix, facilitating the ion/electron transport in the electrochemical process.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 31
·2303815
·
IF 15.1
Junli Ma,Zhenzhen Guo,Xu Han,Heng Lu,Kaixin Guo,Jianguo Xin,Chaoyong Deng,Xianbao Wang
Water evaporation is a ubiquitous and spontaneous phase transition process. The utilization of solar-driven interface water evaporation that simultaneously obtains clean water and power generation can effectively alleviate people's concerns about fresh water and energy shortages. However, it remains a great challenge to efficiently integrate the required functions into the same device to reduce the complexity of the system and alleviate its dependence on solar energy to achieve full-time operation. In this work, a multifunctional device based on reduced graphene oxide (RGO)/Mn 3 O 4 /Al 2 O 3 composite nanomaterials is realized by an asymmetric strategy for effective solar-thermal-electro integration that can induce power generation by water evaporation in the presence/absence of light. Under one sun irradiation, the solar-driven evaporation rate and output voltage are 1.74 kg m −2 h −1 and 0.778 V, respectively. More strikingly, the nine-grid evaporation/power generation array integrated with multiple devices in series has the advantages of small volume, large evaporation area, and high power generation, and can light up light-emitting diodes (LEDs), providing the possibility for large-scale production and application. Based on the high photothermal conversion efficiency and power production capacity of the RGO/Mn 3 O 4 /Al 2 O 3 composite evaporation/generator, it will be a promising energy conversion device for future sustainable energy development and applications.
研究领域:
材料科学
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能源科学
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环境科学
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DOI
PubMed
高影响因子
Advanced Therapeutics
·
2025
·
IF 2.6
Xinwei Zhang,Ziping Wang,Yu Bai,Yulun Hu,Qing Chen,Yueping Liu,Mingming Chang
Rheumatoid arthritis (RA) is an autoimmune disease associated with chronic inflammatory processes. RA, which is typically associated with the accumulation of hyperactive immune cells (HICs), particularly M1 proinflammatory macrophages, is accompanied by elevated levels of reactive oxygen species (ROS) and decreased pH in the synovial membranes of the joints. In this work, a nano-delivery system (MTX-Mn 3 O 4 @PDA) is designed that can deliver photothermal materials, ROS scavengers, and synovial fibroblast inhibitors at the joint site for the treatment of RA. After injecting MTX-Mn 3 O 4 @PDA into the inflamed site of RA, photothermal therapy is initiated by near-infrared (NIR) laser irradiation, which resulted in the death of activated inflammatory cells at the lesion site. While polydopamine (PDA) slowly dissociates under stimulation by a low pH microenvironment. Subsequently, excess ROS interacts with the Mn 3 O 4 nanozyme and the undissociated PDA nanozyme, promoting ROS clearance, while Methotrexate (MTX) inhibits the proliferation of synovial fibroblasts. Intra-articular injection of MTX-Mn 3 O 4 @PDA (7 mg kg −1 ) into collagen-induced arthritis mice demonstrated efficacy in reducing toe swelling and significantly alleviating synovial inflammation, bone erosion, and cartilage degeneration. This nano-delivery system has potential clinical applications for treating RA.
研究领域:
医学
·
生物材料学
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DOI
高影响因子
危险品化学品经营许可证（带存储）