APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Bin Zhang,Shuangqing Xia,Zhenyi Wang,Wenqian Li,Boda Li,Haochen Zhang,Yanjun Xin,Kai Wu,Jun Ma,Xu He
Permanganate [Mn(VII)] needs to be activated to improve its reactivity towards refractory organic contaminants in practice. Herein, visible light (VL) and graphitic carbon nitride (g-C 3 N 4 ) were introduced to enhance the activation of Mn(VII) for the first time. Sulfamethoxazole (SMX) can be degraded effectively by VL/Mn(VII)/g-C 3 N 4 system in neutral and alkaline environments. Different from conventional Mn(VII) activation and photocatalytic processes, the performance of VL/Mn(VII)/g-C 3 N 4 system in various real water samples was superior than Milli-Q water. Mn(V) was found to be the dominant active species responsible for SMX degradation. Photo-induced electron (e cb – ) of g-C 3 N 4 under VL irradiation was proved to be the initiator of Mn(VII) activation. Density functional theory calculations revealed the strong affinity of g-C 3 N 4 for Mn(VII), which can resist the interference of water substrates on the Mn(VII) activation process by photo-induced e cb – . This work deepens the understanding of reactive manganese intermediates in the Mn(VII) activation system.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shuangjun Li,Xiangping Xiao,Luyang Zuo,Rui Li,Lijun Liu,Huitao Fan,Bo Li,Liya Wang
Designing semiconductor photocatalysts with unique structures can improve the transfer efficiency of solar energy to hydrogen (H 2 ). In this study, a dual modification method of element doping and morphological control was used. The Mn-doped hollow octahedron ZnIn 2 S 4 (ZHO-Mn) was synthesized by a simple one-pot solvothermal method using the octahedral Mn-based metal–organic framework (Mn-MOF) as a template. Experiments and theoretical calculations show that the ZHO-Mn has additional active sites, strong light absorption ability and good photoelectric performance. The H 2 production performance of optimized ZHO-Mn10 was the best (11.9 mmol h −1 g −1 ), which was 7.4 times that of monomer ZnIn 2 S 4 (1.6 mmol h −1 g −1 ). This study provides a new one-step method for the dual control of doping and morphology of ZnIn 2 S 4 photocatalyst
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
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Yingbing Zou,Kui Niu,Fubin Luo,Hongzhou Li
The development of metal oxide flame retardants that are easy to synthesize, efficient, and recyclable would be more beneficial to circular economy. In this work, a porous core-shell Mn 3 CoO x was developed to efficiently reduce heat, smoke as well as hazardous gas during the combustion of epoxy resin (EP). Compared with pure EP, the peak heat release rate (pHRR), total heat release (THR), peak smoke production rate (pSPR), total smoke production (TSP), peak CO production rate (pCOPR), and peak CO 2 production rate (pCO 2 PR) of EP/Mn 3 CoO x are reduced by 47.5 %, 21.5 %, 34.6 %, 17.6 %, 58.6 %, and 55.4 %, respectively. It has been shown that Mn 3 CoO x not only catalyzes the formation of high-quality char layer but also effectively catalyzes the conversion of hazardous gas products into CO 2 . Recovery experiments of Mn 3 CoO x filler in EP composites show that the recovery of Mn 3 CoO x can reach 90.0 %. This work provides insights into the design of efficient metal oxide flame retardants and ideas for the development of recycled flame retardants.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Yifang Wu,Jianwang Wu,Mei Lin,Zuliang Chen
The Fenton oxidation system is a widely employed advanced oxidation processes (AOPs) in wastewater treatment. However, the traditional Fenton oxidation system suffers from low oxidant utilization efficiency, leading to significant resource wastage. This study presents a novel self-Fenton Cu-Mn bimetallic catalyst (with a Cu:Mn ratio of 10:1), which is capable of simultaneously activating O 2 to generate H 2 O 2 in situ and further catalyzing the decomposition of H 2 O 2 to produce reactive oxygen species (ROS). Notably, this self-Fenton system demonstrate high removal efficiency for ciprofloxacin (CIP) across a broad pH range (2−9), achieving up to 92.55 % removal in water. Quenching experiments, electron paramagnetic resonance (EPR) analysis, steady-state concentration measurements, and Galvanic oxidation reactor (GOR) experiments collectively confirmed the generation of multiple ROS species (·OH, ·O 2 − , and 1 O 2 ) and indicated that electron transfer plays a significant role in pollutant degradation. X-ray photoelectron spectroscopy (XPS) analysis revealed that Cu 0 exhibited high catalytic activity, enabling simultaneous generation and activation of H 2 O 2 . Liquid chromatography-mass spectrometry (LC-MS) and toxicity assessments demonstrated a significant reduction in the toxicity of CIP degradation products. This work elucidates a novel Cu-Mn synergistic mechanism wherein Mn facilitates the generation of H 2 O 2 , while Cu effectively activates it into ROS. This synergism effect enables the removal of pollutants through both radical and non-radical pathways, thereby offering an innovative strategy for environmental remediation and AOPs.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Yan Tan,Xiao Liu,Yujia Zhang,Yiyang Rong,Xueying Wu,Ting Liu,Zizhen Ma,Huawei Zhang
In the current study, catalytic oxidation technology is among the most widely used methods for removing chlorinated volatile organic compounds (CVOCs). This article details the preparation of the Ag-Mn@ZSM-5 catalyst, which was prepared via the hydrothermal approach, followed by the incorporation of nano-Ag. The focus of the study is the catalytic oxidation of chlorobenzene (CB). Experimental results indicate that the hydrothermally synthesized nano-silver modified Ag-Mn@ZSM-5 catalyst, exhibiting a T90 of 290 °C, demonstrates superior performance compared to the Ag-Mn/ZSM-5 catalyst prepared via the traditional impregnation method, which has a T90 of 365 °C. As the operating airspeed increased from 7000 h −1 to 42000 h −1 , the removal efficiency of CB consistently remained above 90%, with stability maintained over a duration of 30 h. Furthermore, the catalyst exhibited excellent water resistance during a 12 h switching water test. Based on the characterization results, after loading Ag, the ratio of Mn 4+ and Mn 3+ on the surface of the Ag-Mn@ZSM-5 catalyst increases, the reducibility is enhanced, and the surface adsorbed oxygen species is increased, which is conducive to improving the catalytic activity. In addition, the Ag-Mn@ZSM-5 catalyst possesses an optimal pore structure, the proportion of mesoporous is 79.06%, suitable redox capacity, abundant acidic sites, and features a compact crystal stacking structure, which results in remarkable stability, catalytic activity, and space velocity resistance of the catalyst. These advantageous properties facilitate the adsorption and deep oxidation of CB. This study presents promising prospects for industrial applications and aims to offer innovative strategies for the treatment of chlorine-containing waste gases.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 13
·2106863
·
IF 15.153
Jie Huang,Yeqing Chen,Pengpeng Rao,Zongming Ni,Xueying Chen,Jie Zhu,Chen Li,Gaoyang Xiong,Ping Liang,Xin He,Songnan Qu,Jun Lin
Carbonized polymer dots (CPDs) have received tremendous attention during the last decade due to their excellent fluorescent properties and catalytic performance. Doping CPDs with transition metal atoms accelerates the local electron flow in CPDs and improves the fluorescent properties and catalytic performance of the CPDs. However, the binding sites and the formation mechanisms of the transition-metal-atom-doped CPDs remain inconclusive. In this work, Mn 2+ -ion–doped CPDs (Mn-CPDs) are synthesized by the hydrothermal method. The Mn 2+ ions form Mn O bonds that bridge the sp 2 domains of carbon cores and increases the effective sp 2 domains in the Mn-CPDs, which redshifts the fluorescence emission peak of the Mn-CPDs slightly. The Mn 2+ ions form covalent bonds in the CPDs and remedy the oxygen vacancies of the CPDs, which cuts off the non-radiative–recombination process of the Mn-CPDs and increases the quantum yield of the Mn-CPDs to 70%. Furthermore, the Mn O bonds accelerate the electron flow between adjacent sp 2 domains and enhances the electron transport in the Mn-CPDs. Thus, the Mn-CPDs demonstrate excellent catalytic performance to activate hydrogen peroxide (H 2 O 2 ) and produce hydroxyl radicals (•OH) to degrade methylene blue (MB) and rhodamine B (RhB).
研究领域:
材料科学
·
纳米技术
·
催化
·
光化学
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2018
·Vol. 4
·期 5
·487-495
·
IF 3.173
Zhinian Li,Shenliang Wang,Wei Hong,Shihui Zou,Liping Xiao,Jie Fan
Graphical Smart screens : An intelligent approach was developed to screen Na−Mn−W/SiO 2 catalysts for the oxidative coupling of methane (OCM). Effective composition regions other than the standard composition were successfully excavated. The wide range of the optimal composition allowed a fluctuation of composition during the reaction, which secured its excellent stability in the OCM reaction. Optimizing the performance and understanding the mechanism of metal oxide catalysts in the oxidative coupling of methane (OCM) is one of the most important projects in industrial catalysis. Here, we report an intelligent approach to screen Na−Mn−W/SiO 2 catalysts for the OCM reaction via ink-jet printing and multidimensional group testing. The ink-jet-printing-assisted (IJP-A) synthetic methodology ensured a fast synthesis of 1536 catalysts that were evaluated in 24 tests via a multidimensional group testing strategy (m-GT). After two-round synthesis-and-screening processes, several excellent groups with different composition space were screened out. Among the excellent catalysts, the OCM performance of Na−Mn−W/SiO 2 catalyst with higher Na, Mn and W content (G3 and G7) was less sensitive to its constituent than that of Na−Mn−W/SiO 2 catalyst with lower Na, Mn and W content (G1). These results indicated the sensitivity of performance to its Na, Mn and W content decreased in larger Na, Mn and W spaces, consistent with the complex homogeneous/heterogeneous reaction mechanism and multi-active sites. A series of Na−Mn−W/SiO 2 formulas with good performance also provide a reasonable explanation to its excellent stability for the OCM reaction. In addition, this intelligent optimization in total space offers a pathway to study the multicomponent metal oxide catalyst in the OCM reaction.
研究领域:
化学工程
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 8
·1384-1392
·
IF 3.849
S. Ding,X. F. Yang,T. T. Deng,E. H. Song,Z. J. Ma,S. Ye,M. M. Wu,Q. Y. Zhang
Solid-solution phase K(Mn,Zn)F3 mesoporous microspheres have been successfully prepared via a simple one-pot hydrothermal method by using citrate ions as a chelating agent. Effects of the reaction time on the phase transformation and morphological evolution of the K(Mn,Zn)F3 microspheres have been carefully investigated. The results revealed that the hierarchical mesoporous spherical structures with a solid-solution phase were formed from a core–shell structure with mixed phases via the nanoscale Kirkendall effect. It is noted that Yb3+/Er3+-codoped K(Mn,Zn)F3 microspheres exhibit intense single-band red up-conversion emission with environmental responsivity upon excitation using a 980 nm laser diode, indicating a promising potential biomedical application for drug delivery.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 14
·14350-14361
·
IF 2.914
Wu Kang,Si Xiongyuan,Jiang Jin,Si Youbin,Sun Kai,Yousaf Amina
In this study, a novel Fe–Mn binary oxide (FMBO), which combined the oxidation capability of iron and manganese oxides, was constructed to remove sulfamethoxazole (SMX) effectively using the simultaneous co-precipitation and oxidation methods, and the reaction products were probed by liquid chromatography-mass spectrometry (LC/MS). Particularly, FMBO-mediated transformation mechanisms of SMX were explored using radical scavengers and electron paramagnetic resonance (EPR). Results indicated that the best removal efficiency was obtained at a pH of 4.0, with the H 2 O 2 of 6.0 mmol/L and the FMBO dosage of 2.0 g/L, giving 97.6% removal of 10 mg/L SMX within 60 min. More importantly, we found that the hydroxyl (•OH) radicals generated by FMBO through Fenton-like reaction were responsible for the SMX oxidation. EPR studies were confirmed that the peak intensities of hydroxyl adduct decreased remarkably with increasing pH values. Moreover, the four SMX degradation intermediate products were detected by LC/MS and a reaction pathway for the possible mineralization of SMX, with •OH radicals as the main oxidant, was proposed. These findings provide a novel insight into the removal of SMX by FMBO-mediated radical reactions in aquatic environments. Moreover, this research suggested that FMBO can act as an efficient catalyst to remove SMX in hospital wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2024
·Vol. 14
·期 7
·397
·
IF 3.8
Yuxuan Zhang,Ruibo Wei,Lin Yang,Jinming Ge,Feiyang Hu,Tingting Zhang,Fangyin Lu,Haiwang Wang,Jian Qi
The low-temperature oxidation of methane gas in coal mine exhaust gas is important for reducing the greenhouse effect and protecting the environment. Unfortunately, the carbon–hydrogen bonds in methane molecules are highly stable, requiring higher reaction temperatures to achieve effective catalytic oxidation. However, metal oxide-based catalysts face the problem of easy sintering and the deactivation of active components at high temperatures, which is an important challenge that catalysts need to overcome in practical applications. In this work, a series of Mn-Co3O4active components were grown in situ on ZSM-5 zeolite with mesoporous pore structures treated with an alkaline solution via a hydrothermal synthesis method. Due to the presence of polyethylene glycol as a structure-directing agent, manganese can be uniformly doped into the Co3O4lattice. The large specific surface area of ZSM-5 zeolite allows the active component Mn-Co3O4to be uniformly dispersed, effectively preventing the sintering and growth of active component particles during the catalytic reaction process. It is worth mentioning that the Mn-Co3O4/meso-ZSM-5-6.67 catalyst has a methane conversion rate of up to 90% at a space velocity of 36,000 mL·g−1·h−1and a reaction temperature of 363 °C. This is mainly due to the mesoporous ZSM-5 carrier with a high specific surface area, which is conducive to the adsorption and mass transfer of reaction molecules. The active component has an abundance of oxygen vacancies, which is conducive to the activation of reaction molecules and enhances its catalytic activity, which is even higher than that of noble metal-based catalysts. The new ideas for the preparation of metal oxide-based low-temperature methane oxidation catalysts proposed in this work are expected to provide new solutions for low-temperature methane oxidation reactions and promote technological progress in related fields.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ziyi Wang,Yuqian Zhang,Chengping Li,Liang Wang,Ting Bian,Shitan Yan,Kuzmin Anton,Liuting Zhang
Incorporating solar steam generation with the hydrovoltaic effect presents a promising approach to concurrently addressing water scarcity and energy challenges. However, realizing a high water evaporation rate while simultaneously maintaining substantial electrical output in a single device remains a formidable obstacle. Here, this study presents a novel hydrovoltaic and galvanic effects-coupled evaporation platform (HGEP) for dual-function applications in freshwater production and electricity generation from seawater. Coating urchin-like Mn-doped Co 3 O 4 on inclined nickel foam (NF), the system achieves a stable evaporation rate of 1.77 kg m −2 h −1 in 3.5 wt% brine under 1 kW m −2 irradiation with a 30° tilt angle. The inclined structure facilitates unidirectional ion transport by establishing a salinity gradient, effectively preventing salt deposition for up to 8 h. Moreover, integrating Zr-Al electrodes effectively combines the hydrovoltaic and galvanic effects, enabling the HGEP to deliver a stable open-circuit voltage of 1.0 V and a short-circuit current of 1.5 mA—over an order of magnitude higher than the pure hydrovoltaic effect (0.49 V, 0.15 mA)—and achieve a maximum power density of 0.8 W m −2 . This study presents an innovative solar-powered water treatment technology that simultaneously achieves water production and power generation
研究领域:
材料科学
·
能源技术
·
环境工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinghang Sun,Zhongmin Fang,Xianfa Zhang,Linjie Li,Xiaodan Zhao
Advanced oxidation processes (AOPs) based on sulfite activation have been demonstrated to achieve cost-effective and highly efficient abatement of organic pollutants. In this work, the manganese-doped γ-Fe 2 O 3 catalyst (Mn-γ-Fe 2 O 3 ) is constructed based on the properties of Mn(II) with surface oxygen vacancy regulation and as an active site for sulfite activation. The increase of the Mn(II) doping ratio is favorable for the generation of surface oxygen vacancy with the content being enhanced more than two times when the Mn(II) doping ratio is 0.09 compared with that of γ-Fe 2 O 3 . The iohexol (IOX) abatement efficacy by sulfite activation with Mn-γ-Fe 2 O 3 is positively correlated with the oxygen vacancy content, in which SO 4 •− is the major free radical responsible for IOX degradation and HO • plays a secondary role. The presence of surface oxygen vacancy on the Mn-γ-Fe 2 O 3 exhibits low electrochemical resistance. The theoretical calculations support the enhancement of the electron transfer between Mn-γ-Fe 2 O 3 and sulfite with more negative adsorption energy and strong interaction of iron and manganese atoms. By analyzing the valence variation before and after the reaction, both > Mn(II) and > Fe(III) can participate in the acceleration of sulfite autoxidation process to generate radicals. Application of surface oxygen vacancy enriched Mn-γ-Fe 2 O 3 for sulfite activation exhibits good adaptability to different real water matrices and thus have some potential for practical applications.
研究领域:
环境科学
·
催化化学
✓ 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）