Small
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2024
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IF 13
Lian-Hua Xu,Qichang Wang,Liangdong Hu,Dekui Shen,Sheng Chu,Huiyan Zhang
The electrochemical reduction of oxygen is pivotal for advancing emerging energy technologies. Precise control over morphology and electronic structure is essential for enhancing catalytic activity and stability in the oxygen reduction reaction (ORR). In this study, a freestanding carbon electrode is developed by in-situ growth of carbon nanotube (CNT)-encapsulated bimetallic CoM (M = Ni, Fe, Mn, Cu) nanoparticles (NPs) within a hierarchical carbonized wood matrix (CoM@NWCC). The hierarchically porous architecture of the electrode promotes efficient mass transfer during the ORR. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) analyses revealed that incorporating metals such as Ni, Fe, Mn, and Cu modulates the electronic structure of Co, specifically adjusting the distance between the d-band center (E d ) and the Fermi level (E F ), thus optimizing ORR kinetics. Among these, CoNi@NWCC, with its asymmetric electronic configuration, achieves an optimal balance between OH * and OOH * adsorption, significantly enhancing catalytic performance. This study demonstrates the potential of band structure engineering to precisely tailor catalyst properties, offering a cost-effective and high-performance solution for zinc-air batteries (ZABs) suitable for large-scale deployment.
研究领域:
材料科学
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能源技术
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Zijian Song,Ben Wang,Wu Yang,Tao Chen,Chuan Ma,Lushi Sun
Fe 2.5 M 0.5 O 4 (M = Mn, Ti and Cu) were investigated for the first time as the catalyst for simultaneous removal of NO and SO 2 through catalytic oxidation-absorption with vaporized H 2 O 2 . The physicochemical properties of as-prepared catalysts were comprehensively characterized by XRD, SEM, TEM, BET, XPS, TPR, VSM, TG and PL analyses. Activity test results showed that SO 2 can be completely removed under most conditions. However, NO removal was affected by catalyst, H 2 O 2 consumption, reaction temperature, GHSV and coexistence gases (i.e., H 2 O, O 2 , NO and SO 2 ). Mn, Ti and Cu doping in the magnetite can remarkably enhance NO removal. Redox pairs and oxygen vacancy of catalysts were considered as vital factors affecting OH generation. Base on the catalyst characterization and DFT calculation results, the main mechanism of Mn, Ti and Cu doping on the catalytic activity improvement was explained as follows: (a) Mn, Ti and Cu doping can increase the catalyst surface area; (b) Ti on the surface can directly promote the catalytic decomposition of H 2 O 2 ; and (c) Mn and Cu doping can promote the generation of oxygen vacancy and indirectly increase the activity. Moreover, two arrangement forms of an industrial simultaneous removal system for NO, SO 2 and Hg 0 were proposed.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
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IF 4.3
Ruxin Liu,Tao Yu,Xingwang Niu,Jinsheng Li,Xuefei Lei,Zhaobo Wang,Rui Guo
Antibiotic pollution from compounds such as tetracycline hydrochloride (TC-HCl) is a growing concern due to its persistence in the environment and potential to promote antimicrobial resistance. Conventional treatment methods for such wastewater often suffer from low efficiency and high operational costs. In this study, a bimetallic FeMn-BTC material with a two-dimensional sheet-like morphology was synthesized via a facile one-pot ultrasonic method for the efficient degradation of TC-HCl. By precisely selecting the Fe/Mn molar ratio to 7:3, a high density of accessible Fe(II) active sites was achieved. Under visible-light irradiation, FeMn-BTC degraded 92% of high-concentration TC-HCl (100 mg/L) with a reaction rate constant of 0.06703 min −1 , which is 10.5 times higher than that of the monometallic Fe-BTC. This remarkable enhancement is attributed to the incorporation of manganese, which facilitates the Fe(III)/Fe(II) redox cycle and extends the visible-light absorption range. Density functional theory (DFT) calculations further verify that manganese doping lowers both the adsorption and O-O bond cleavage energy barriers of H 2 O 2 . Mechanistic studies identify hydroxyl radicals (·OH) as the primary reactive species, with the synergistic interaction between iron and manganese promoting H 2 O 2 activation and charge-carrier separation. The catalyst also exhibits excellent stability over a wide pH range (3–9) and shows universal degradation activity toward various pollutants (methylene blue, rhodamine B, and malachite green) as well as in real water matrices containing common anions such as Cl − and SO 4 2− . After four consecutive recycling runs, the material retains over 75% of its initial degradation efficiency, outperforming most reported metal–organic framework-based catalysts. This work offers theoretical insights and a practical strategy for designing highly efficient photocatalysts for Fenton-like reactions.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Xing Yuan,Lingquan Meng,Chaohe Zheng,Haibo Zhao
Perovskites have been recognized as affordable substitutes for noble-metal catalysts for their tunable catalytic activity and thermal stability. Nevertheless, the highly demanding synthesis procedure still hinders the application of perovskites in catalytic combustion. In this work, a series of nanostructured SiTiO3 perovskites with B-site partial substitution by Co, Fe, Mn, Ni, and Cu are synthesized via flame spray pyrolysis in one step. The comprehensive characterizations on textural properties of nanostructured perovskites reveal that the flame-made perovskite nanoparticles all exhibit high crystal purity and large specific surface area (∼40 m2/g). Furthermore, the highest catalytic activity is achieved by SrTi0.5Co0.5O3 due to the formation of favorable oxygen vacancies, outstanding reducibility, and oxygen desorption capability. Additionally, the presence of 10 vol % water vapor during long-term testing indicates remarkable durability and water resistance. Finally, the CO oxidation and CH4 dehydrogenation on SrTiO3 incorporating Co atoms are more thermodynamically and kinetically favorable than those on other doped surfaces.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2019
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IF 3.465
Jishen Li,Xiyun Yang,Yuyao Fu,Haiqiang Huang,Zhijie Zhong,Yuanyuan Wang
A comprehensive utilization process of Fe, Mn, Ni and Co in the acid leaching liquor of spent lithium ion batteries was put forward. Fe and part of Mn were extracted to synthesize Fe-doped lithium ion-sieve. Ni, Co and the rest of Mn were coprecipitated to prepare ternary lithium ion battery cathode material precursor Ni x Co y Mn 1-x-y (OH) 2 . After removing Cu 2+ ions in acid leaching liquor by adding MnS, two-stage counter current extraction and one-stage stripping were used to extract all Fe 3+ and 40.3% of Mn 2+ ions in sulfuric acid leaching solution to obtain a MnSO 4 stripping solution containing Fe 3+ ions. Iron-doped lithium ion-sieve was synthesized by oxidation of the resulting MnSO 4 solution with KMnO 4 followed by roasting and acid leaching. Fe incorporates into the lattice of lithium ion-sieve and improves the structure stability. Fe-doped lithium ion-sieve shows Li adsorption capacity of 35.29 mg.g −1 and Mn dissolution loss of 1.66%. The Li + adsorption in salt lake brine with the Fe-doped ion-sieve follows a pseudo-second-order kinetic model . Ni x Co y Mn 1-x-y (OH) 2 is regular spherical particles with β-Ni(OH) 2 -like structure. This process provides a simple method for recovery and utilization of Mn, Fe, Ni and Co in spent lithium ion batteries .
研究领域:
材料科学
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资源回收利用
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电化学
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环境工程
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能源存储
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
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2024
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IF 6.3
S. Jafari,A.R. Faraji,A. Gil,F. Ashouri
Valorizing single-use plastic waste as an effective activator in environmental protection has gained great interest from policymakers, legislators, and scientific research communities. Herein, low-cost and highly porous alkali Fe/Mn-doped carbon nanomaterials derived from polyethylene terephthalate (PET) waste (MF/ c PET- x ) were fabricated via facile pyrolysis and alkali-metal impregnation methods. Detailed characterizations of MF- c PET- x demonstrated that the ratio of alkaline impregnation and pyrolysis temperature affects the porous characteristics, content, and size of active sites, specific surface area, and yield of carbon residue/nanocomposite. The main aim of this study was to evaluate and optimize the MF/ c PET- x applied for the detoxification of various kinds of pharmaceutical drugs ( tetracycline , naproxen , paracetamol , and levofloxacin ) and various dyestuff in their single, binary, ternary, and quaternary solutions. The magnetic porous MF/ c PET-1 was found to show a most effective PMS activation for single/multiple toxic pollutants removal attaining levels >91.0 % in a wide range of temperatures (5–35 °C) and pH (3.0–9.0), without significant detectable metal leaching (>0.16 mg L −1 ). The outstanding catalytic performance in complex water environments was mainly attributed to the deposition of Mn/Fe nanoparticles with small grain size on a polymeric scaffold, bimetal synergistic effect, high specific surface area, high stability, and excellent anti-interference capability against coexisting substances. Physicochemical properties of the recycled composite, masking, and EPR analyses confirmed that the dominant reactive species in the following order: 1 O 2 > OH > SO 4 − > O 2 − . This work offers a new and straightforward approach for preparing porous alloy composite from plastic waste for pollutant degradation in various water matrices.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Jun Lu,Zhipan Wen,Yalei Zhang,Gang Cheng,Rui Xu,Xiaohu Gong,Xin Wang,Rong Chen
A series of ordered mesoporous Fe Mn bimetal oxides (OMFMs) were fabricated by using a novel inverse micelle method, and the texture, nanostructure and interface chemistry properties of OMFMs were closely correlated to the calcination temperature. Due to the amorphous regular inner-connected nanostructure and bimetallic synergistic effect, the obtained OMFMs exhibited superior arsenic sequestration performance than pure mesoporous Fe oxides (PMF) and Mn oxides (PMM). The optimum ratio of Fe/Mn and calcination temperature for arsenic removal was 3/1 and 350 °C (OMFM-3), and the maximum As(III) and As(V) adsorption capacities of OMFM-3 were 174.59 and 134.58 mg/g, respectively. Solution pH value negligibly affected the uptake of arsenic (ranged from 3.0 to 7.0), while SiO 3 2− /PO 4 3− ions and humic acid (HA) displayed significant inhibitory effect on arsenic removal by OMFM-3. According to the mechanism of arsenic removal, which simultaneously analyzed the arsenic redox transformation in aqueous phase and on solid phase interface, it was concluded that manganese oxides in OMFM-3 mainly played the role as a remarkable As(III) oxidant in water, whereas iron oxides dominantly acted as an excellent arsenic species adsorbent. Finally, the prominent arsenic sequestration behavior and performance in surface water suggested that OMFM-3 could be a promising and hopeful candidate for arsenic-contaminated (especially As(III)) surface water and groundwater remediation and treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Today
·
2022
·
IF 18.962
Di Liu,Hongliang He,Fei Kong,Yixiang Cao,Fengchao Zang,Ming Ma,Ning Gu,Yu Zhang
Currently, multimodal synergistic nanoplatform emerges as an important cancer therapy paradigm, however, multimodal synergistic theranostic nanoplatform remains to be developed. Herein, using the mouse model of breast cancer, a versatile multimodal synergistic theranostic nanoplatform is rationally designed and synthesized for enhancing chemodynamic therapy (CDT), overcoming immunosuppression within tumor microenvironment , and inhibiting metastasis as well as tracking tumor. To fulfill our design, a composite Fe/Mn magnetic nanoparticle is first synthesized by loading with Fe 3 O 4 and BMS-202 (PD-L1 inhibitor) within a poly(lactide-co-glycolide)-based nanoparticle core, which are further modified with in situ synthesis of MnO 2 layer. Then, the composite metal-organic nanoparticle is coated with two targeting moieties hyaluronic acid (HA) and AMD3100 (CXCR4 antagonist), respectively, to achieve the multimodal synergistic theranostic nanoplatform ( [email protected] +AMD). With surface targeting modification, [email protected] +AMD exhibits enhanced tumor accumulation, where it effectively consumes endogenous glutathione to generate Mn 2+ allowing for the enhanced CDT effect, alleviates tumor hypoxia by O 2 generation and reverses the tumor immunosuppression. [email protected] +AMD blocks CXCR4 receptor on cancer cells, thus suppressing the CXCR4-mediated cancer metastasis and invasion. Additionally, [email protected] +AMD would synchronously be achieving tumor tracking by T 1 -T 2 dual-mode magnetic resonance imaging. Collectively, this strategy holds a novel multimodal synergistic theranostics for effective cancer management.
研究领域:
纳米技术
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癌症治疗
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医学成像
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免疫疗法
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药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Li Xinyu,Li Jingqi,Li Na
This study investigated the effects of sequential acid treatment and phosphorus incorporation on the performance of Fe–Mn-Ce composite metal oxide catalysts. The FeMnCeO x catalyst was prepared using the sol–gel method and modified through two methods: treatment with phosphoric acid alone and a sequential treatment with phosphoric acid followed by sulfuric acid. The results show that the sequentially acid-treated catalyst exhibited over 90% NO x conversion and N 2 selectivity in the temperature range of 200–350 °C, outperforming other catalysts. Characterization analyses such as XRD and NH 3 -TPD revealed that acid modification enhanced the surface acidity and redox properties of catalysts. XPS analysis showed that sequential acid treatment increased the surface chemisorbed oxygen content of the catalyst and optimized its surface structure. In-situ DRIFTS spectroscopy further elucidated that the catalytic reaction follows both Langmuir–Hinshelwood and Eley–Rideal mechanisms concurrently.
研究领域:
环境科学
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催化化学
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材料科学
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化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2024
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IF 7.2
Qinqin Xu,Xiaohua Ban,Lingjie Yang,Yanrong Chen,Fang Zhang,Yu Wang,Peng Cao,Meng Yu,Xiaohui Duan
Chemodynamic therapy (CDT), which uses metal ions to covert endogenous hydrogen peroxide into highly reactive hydroxyl radicals, is an newly-developing strategy for cancer therapy. However, poor drug delivery efficiency and restricted catalytic performance hinder the therapeutic potential of CDT. Herein, we constructed an in situ injectable hydrogel incorporating Fe/Mn-polydopamine nanoparticles and the ferroptosis inducer piperazine erastin (PE) (FMPEG) for mediating tumor-specific magnetic resonance imaging-visualized photothermal therapy (PTT)/CDT. Upon exposure to near-infrared light irradiation, FMPEG treatment exerted a PTT effect, which further accelerated the drug release behavior from FMP nanoparticles in response to the acidic tumor microenvironment. The released metal ions and PE enhanced the CDT effect at the tumor site. Furthermore, a long-term antitumor effect was obtained via the immunostimulatory effect of CDT/PTT by producing tumor-associated antigens. These findings, along with the unique advantages of injectable hydrogels in immune activation, prove the great potential of FMPEG administration as an efficient strategy for the clinical prevention of distant tumor metastasis of breast cancer.
研究领域:
肿瘤学
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医学影像
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纳米技术
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癌症治疗
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免疫疗法
✓ 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）