NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 37
·17576-17583
·
IF 3.591
Lijun Xu,Lu Yang,Aihua Liu
One-pot synthesis of Mn3O4 nanorods is reported for the first time by the oxidation of manganese metal resulting from reducing Mn2+ by NaBH4 at room temperature. The resultant Mn3O4 nanorods were 10–70 nm in width and up to hundreds of nanometers in length, and were very stable in aqueous solution. The Mn3O4 nanorods can oxidize H2O2 under acidic conditions quickly accompanying their decomposition. Using 3,3′,5,5′-tetramethylbenzidine (TMB) as a competitive chromogenic substance, colorimetric methods were developed for the sensitive detection of H2O2 and glucose. The methods exhibited a linear range of 2–100 μM with a limit of detection (LOD) of 1.7 μM for detecting H2O2, and a linear range of 5–200 μM with a LOD of 4.4 μM for detecting glucose. The application in analyzing glucose in human serum samples demonstrates its practicability.
研究领域:
分析化学
·
纳米材料科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2022
·
IF 0
Zhe Yuan Liu,Ling Fang Qiu,Shu Wang Duo,Jin Yong Lu,Ying Ying Hou
In this work, CdS nanosheets were synthesized by microwave hydrothermal method. We used a simple synthesis method to prepare Mn3O4/CdS composites. The crystal phase, surface chemical component and optical properties of Mn3O4/CdS, Mn3O4 and CdS were analyzed based on the characterizations such as XRD, FT-IR, DRS and PL. Mn3O4/Cd composites showed obvious broadened visible-light adsorption at wavelength over 460 nm. When the mass ratio of Mn3O4 and CdS was 1.0%, Mn3O4/CdS displayed the best RhB degradation efficiency which was 22.39% higher than the pure CdS. The improved photocatalytic efficiency should be attributed to the lower photo-induced electron–hole pair recombination rate and accelerated transfer rate of photogenerated electrons based on heterojunction structure. The achievements provided new way to exploring novel CdS-based heterojunctions for decomposing organic pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Zhibin Geng,Yanxiang Wang,Jinghai Liu,Guangshe Li,Liping Li,Keke Huang,Long Yuan,Shouhua Feng
Pure phase manganese oxides have been widely studied as water oxidation catalysts, but further improvement of their activities is much challenging. Herein, we report an effective method to improve the water oxidation activity by fabricating a nanocomposite of Mn3O4 and δ-MnO2 with an active interface. The nanocomposite was achieved by a partial reduction approach which induced an in situ growth of Mn3O4 nanoparticles from the surface of δ-MnO2 nanosheets. The optimum composition was determined to be 38% Mn3O4 and 62% δ-MnO2 as confirmed by X-ray photoelectron spectra (XPS) and X-ray absorption spectra (XAS). The δ-MnO2–Mn3O4 nanocomposite is a highly active water oxidation catalyst with a turnover frequency (TOF) of 0.93 s–1, which is much higher than the individual components of δ-MnO2 and Mn3O4. We consider that the enhanced water oxidation activity could be explained by the active interface between two components. At the phase interface, weak Mn–O bonds are introduced by lattice disorder in the transition of hausmannite phase to birnessite phase, which provides active sites for water oxidation catalysis. Our study illustrates a new view to improve water oxidation activity of manganese oxides.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Li Chen,Tahir Maqbool,Congyu Hou,Wanyi Fu,Xihui Zhang
In recent years, activation of persulfate via Mn-based composites has gained interest due to extraordinary kinetics and performance for the degradation of organic contaminants. However, the potential of pristine manganese oxides (Mn 3 O 4 ) in removing organic compounds and its mechanism has not been comprehensively explored yet. This study systemically investigated the Mn 3 O 4 based peroxymonsulfate (PMS) activation to effectively mitigate bisphenol A (BPA) in different real water matrixes. Substantial mineralization (75.9%) with efficient removal of BPA (96.7%) has been achieved at optimum conditions in 60 min. A long-term performance, eight cycles of reusability, has shown merely an 11% reduction in BPA removal, highlighted the higher stability of Mn 3 O 4 . The oxidizing contributions of reactive oxygen species (ROS) were in the order of 1 O 2 > O 2 •- > SO 4 •- > • OH. The different water matrixes have influenced BPA degradation by<10%. Linear changes in BPA aromatic contents were recorded using log-transformed ultraviolet (UV) spectra and fluorescence excitation-emission matrix (EEM). Total 17 transformation products (TPs) were detected in Mn 3 O 4 /PMS/BPA system, with 13 decreasing concentrations and 4 TPs in increasing concentration with the β-scission reaction as the main pathway for the degradation of BPA. The toxicity of BPA after degradation was also significantly suppressed measured by the activated sludge inhibition method.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Jiajia Chen,Baobao Bai,Juan Lei,Peng Wang,Shuang Wang,Jinping Li
Mn 3 O 4 catalysts have shown great potentials for toluene catalytic oxidation for the spinel structure and weak metal oxygen bonds. In this work, Mn 3 O 4 and Mn 2 O 3 catalysts were obtained by using Mn-MOFs with different ligands as precursors. It was found that the reduction of hydroxyl groups in 2,5-dihydroxyterephthalic acid was favorable for the preparation of Mn 3 O 4 under the proper temperature range. The Mn 3 O 4 -MOF-74–300 catalyst exposed the highest Mn 3+ , O ads /O latt and reducing capacity. Herein, the Mn 3 O 4 -MOFs-74–300 catalyst exhibited excellent performance for toluene oxidation, which could achieve 90% toluene conversion at 218 ℃ (toluene concentration = 1000 ppm and SV = 20000 mL·g −1 ·h −1 ). Moreover, the Mn 3 O 4 -MOFs-74–300 catalyst exhibited high stability, circulation performance and water resistance in the catalytic test.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Zihao Hu,Xiaoying Zhou,Tiantian Zhang,Zuliang Wu,Jing Li,Wei Wang,Erhao Gao,Jiali Zhu,Shuiliang Yao
Catalytic combustion has been considered the effective way to oxidize carbon monoxide (CO). It is both crucial and challenging to develop highly-active monolithic catalysts at lower temperatures for industrial applications. This study synthesized a monolithic Co 3 O 4 /Mn 3 O 4 -NF catalyst by the generation of in-situ metal–organic framework (MOF-74)-derived Co 3 O 4 /Mn 3 O 4 on nickel foam (NF). The resulting Co 3 O 4 /Mn 3 O 4 -NF catalyst demonstrated superior low-temperature CO oxidation performance, and the T 90 temperature was 20 °C. The enhanced activity is associated with the increased oxygen vacancy concentration, abundant Co 3+ , Mn 2+ + Mn 3+ , and surface-adsorbed oxygen species (O ads ), as well as low-temperature reducibility. In addition, operando DRIFTS analysis revealed that the surface of this as-prepared catalyst possessed abundant terminal-type oxygen (M O), facilitating CO adsorption and catalytic oxidation. This pioneering study introduces a paradigm-shifting insight: the effectiveness of non-noble metal oxide catalysts can now compete with, and in some cases, outperform their noble metal counterparts. This breakthrough is set to transform the industry, presenting a compelling alternative to conventional noble metal catalysts and propelling the evolution of state-of-the-art environmental conservation technologies.
研究领域:
催化材料
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Kai Guo,Gan Qu,Jin Li,Huicong Xia,Wenfu Yan,Jianwei Fu,Pengfei Yuan,Jianan Zhang
Lithium-sulfur batteries (Li-S batteries) have attracted considerable attentions for the low cost and high theoretical energy density of sulfur. However, the Li-S batteries often undergo rapid degradation due to the severe “shuttle effect”, sluggish redox kinetics, and the insulator nature of sulfur. Herein, the Mn 3 O 4 -MnP x heterostructure was constructed via the in-situ crystallization of Mn 3 O 4 -MnP x on amorphous phosphrus (P) NPs-modified carbon nanosheets. According to the experimental test and density functional theory calculation, Mn 3 O 4 exhibits strong adsorption ability towards polysulfides. Meanwhile, MnP x dramatically catalyzes the conversion reactions between sulfur and polysulfides. The synergistic effect of Mn 3 O 4 and MnP x facilitates the facile redox kinetics and effective entrapment of polysulfides. As a result, the improved specific capacities of 1410 and 804 mA h g - 1 are obtained at 0.1 and 2 C, respectively. The capacity decay is only 0.041% per cycle over 1000 cycles at 0.5 C. This work indicuates that the interface regulation and design play an important role in advancing the electrochemical performance in Li-S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xueqing Li,Yulong Yan,Nannan Zhang,Xueling Liu,Xubo Zhao
Polydopamine (PDA) has demonstrated remarkable potential in the biomedical field due to its excellent biocompatibility. Exploring functional PDA can further enhance its application in drug delivery systems (DDS). In this study, we present a facile one-pot fabrication method for GSH- responsive PDA nanoparticles (NPs) through in situ formation of Mn3O4. Following PEGylation, the resultant functional DDS ((Mn3O4/PDA)-PEG) was used to encapsulate the chemotherapy drug doxorubicin (DOX), yielding DOX-loaded (Mn3O4/PDA)-PEG NPs. The findings indicate that the incorporation of Mn3O4 significantly enhances the responsiveness of PDA to tumor microenvironment stimuli, enabling GSH-triggered controlled drug release at specific sites. Moreover, Mn3O4 effectively prevents premature drug release under normal physiological conditions. Consequently, leveraging the GSH-responsiveness of the DDS facilitates the disassembly of PDA NPs, thereby markedly improving the bioavailability and therapeutic efficacy of chemotherapy drugs. This work encourages us to continue to prepare polydopamine materials with multiple functions through rational additive substances to improve the bioavailability of chemotherapy drugs.
研究领域:
生物医学工程
·
材料科学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yi Ding,Lixin Dai,Rui Wang,Haixiao Wang,Hengbin Zhang,Wei Jiang,Jun Tang,Shuang-Quan Zang
Optimizing the performance of electrode materials is crucial for improving the energy density of aqueous supercapacitors. Herein, a novel strategy inspired by biomimetic mineralization is developed to acquire a hierarchical flower-like Mn 3 O 4 @N, P-doped carbon (NPC) composite, which consists of multi-intercalated Mn 3 O 4 nanosheets and NPC cores. The Mn 3 O 4 nanosheets offer abundant active regions, and their C-O-Mn bonds with NPC ensure the fast electron transfer kinetics. It is noteworthy that the intercalation pseudocapacitance mechanism of Mn 3+ /Mn 4+ transformation in Mn 3 O 4 @NPC not only extends the potential window to 0–1.3 V (vs Ag/AgCl) but also significantly increased pseudocapacitance. Benefits from the advantages of structure and energy storage mechanism, the Mn 3 O 4 @NPC electrode delivers a high specific capacitance of 370.8 F g −1 and superior rate performance. A 2.6 V flexible aqueous asymmetric supercapacitor (FAAS) is fabricated by integrating Mn 3 O 4 @NPC cathode with an electrochemically reduced porous carbon anode and a PVA-Na 2 SO 4 hydrogel electrolyte. Notably, the FAAS delivers a high energy density of 76.96 Wh kg −1 as well as excellent rate capability. The device exhibited an excellent stability during 10,000 cycles and additional 240 h floating test. The strategy will pave the way for the development of electrode materials for FAASs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yongjian Zhu,Zhipeng Quan,Bolun Zhang,Junhui Zheng,Jie Wang,Xinxin Zhang,Chi Zhang,Tao Yang,Xin He,Songnan Qu,Yeqing Chen,Ping Liang
A composite of nitrogen-doped carbon dots and Mn 3 O 4 (CMO) was synthesized using a facile hydrothermal and precipitation method for peroxymonosulfate (PMS) activation. Surprisingly, high concentrations of H 2 PO 4 − (DP, above 20 mM) significantly enhanced the degradation efficiency of bisphenol A (BPA). The improvement was not attributed to the accelerated cleavage of PMS or pH variation. Instead, DP could directly form a complex with CMO, generating Mn(III)-DP with a high potential (0.64 V vs. SCE, 100 mM of DP). Simultaneously, it decreased the oxidative potential of BPA from 0.69 to 0.38 V vs. SCE. The degradation pathways of BPA differed in the CMO/PMS and CMO/DP systems. These findings inspire further exploration of carbon dots-based catalysts in persulfate activation and unveil the origin of enhanced performances by phosphate.
研究领域:
环境科学
·
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·Vol. 110
·期 3
·678-689
·
IF 2.3
Hou Ruiting,Wang Shaozheng,Wang Haishan,Tian Lanlan,Zhu Xiangxiang,Li Yule,Chen Qingming,Zhang Hui
La 1- x Ca x MnO 3 , as a candidate for thermal radiation detectors, has received more attention due to the quest for a higher temperature coefficient of resistance (TCR), however, the narrow high-TCR temperature range greatly limits its application in uncooled bolometer. In this paper, Mn 3 O 4 - La 1- x Ca x MnO 3 ( x = 0–0.33) composite ceramics were prepared using the sol-gel method. A suitable TCR was achieved over a wide temperature range, including room temperature, by adjusting the Ca content. As the Ca content decreased, the resistivity ( ρ ) of the composite gradually increased at 300 K, and the positive TCR (PTC) peak shifted to a lower temperature. However, the negative TCR (NTC) was enhanced over a wider temperature range. When x = 0.05, the maximal NTC was −3.2%·K −1 within the range of 172 K–350 K and |TCR| > 2%·K −1 , spanning a large temperature range around 180 K, including room temperature. These results strongly indicate that the composite, such as Mn 3 O 4 - La 1- x Ca x MnO 3 , provides a new idea for uncooled bolometer/night vision. Graphical Abstract
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 191
·期 1
·1-11
·
IF 5.7
Lu Yuyang,Shen Nuotong,Xi Yachao,Zhu Tao,Peng Hao,Zhong Lihao,Li Fang
Mn 3 O 4 nanozyme with good oxidase-like activity was successfully synthesized. The prepared Mn 3 O 4 nanozyme can directly and effectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to generate green–blue-colored ox-TMB. Creatinine exhibits distinct inhibition effect on Mn 3 O 4 nanozyme-catalyzed TMB colorimetric reaction system, leading to obvious color fading and absorbance intensity decrease of the reaction system. Furthermore, interference from uric acid can be effectively eliminated by regulating the pH of TMB-Mn 3 O 4 colorimetric reaction system to pH 2.0. Then, a simple and bioenzyme-free colorimetric assay for the determination of creatinine was developed based on TMB-Mn 3 O 4 colorimetric reaction. The linear detection range is from 100 to 800 μM and from 1 to 20 mM. The lowest limit of detection is 35.3 μM. Satisfied results are obtained for the determination of creatinine in real urine and sweat samples. This work provides the synthesis of a good oxidase-like nanozyme Mn 3 O 4 and presents the fabrication of an effective nanozyme-based bioenzyme-free colorimetric assay for the determination of creatinine. Graphical Abstract
研究领域:
生物化学
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）