CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 7
·11298-11303
·
IF 5.1
Senkui Qu,Huan Liu,Yu Jiang,Zhihua Qian,Bing Liu,Minmin Mao,Zhilun Lu,Hadi Barzegar Bafrooei,Yingjie Ren,Ehsan Taheri-Nassa,Feng Shi,Ge Wang,Kaixin Song
Y 3-x Mn x Al 5-x Si x O 12 (x = 0.1–0.5) ceramics were fabricated through the high-temperature reaction method. The effects of Mn 2+ -Si 4+ co-doping on lattice occupancy, ligand distortion and microwave dielectric properties of Y 3 Al 5 O 12 garnet were inquired. Mn 2+ ions successively occupy the lattice sites of Y 3+ dodecahedron and Al 3+ octahedron along with the increase of distortion degree of [AlO 6 ] octahedron. In Y 3-x Mn x Al 5-x Si x O 12 , ε r predominantly correlates with ionic polarizability , average bond ionicity (△ f i ) and Mn 2+ ionic lattice occupation. The Q × f is primarily influenced by factors like relative density, lattice energy (U) and atomic packing fraction. Meanwhile, τ f is associated with the distortion of octahedra, bond energy (E), and the bond valence between Y/Mn and O. Ultimately, the microwave and millimeter-wave dielectric properties of the Y 2.8 Mn 0.2 Al 4.8 Si 0.2 O 12 ceramics excel with values of ε r = 10.89, Q × f = 56,135 GHz@11 GHz (Q × f = 88200 GHz@25 GHz), and τ f = -39.35 ppm/°C.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhuoyao Fang,Siyuan Pan,Xiaolin Zhang,Lu Lv,Bingcai Pan
Efficient removal of As(III) from groundwater remains an urgent but still challenging task. The X-Mn (X = Fe, Zr, Al…) binary oxide nanoparticles enable simultaneous oxidation and sequestration of As(III), yet facing the challenges in facile synthesis of the ultra-small nanoparticles with extraordinary decontamination reactivity, and in effective regeneration of oxidation capability. Herein, we prepared a novel nanocomposite Zr-Mn@N201 by conducting stepwise precipitation of hydrated oxides of zirconium (HZO) and manganese (HMO) inside the commercial gel-type anion exchanger N201, i.e. , the quaternary ammoniated poly(styrene-co-divinylbenzene) bead. Owing to restriction of nanopores, the HZO/HMO inside N201 possessed an ultra-small size around 4.78 nm. The kinetics and spectroscopic results suggested that As(III) was transformed into As(V) by HMO prior to adsorption onto HZO, and the negatively charged HMO captured most of the produced Mn 2+ ions. Alkaline treatment could regenerate Zr-Mn@N201 through simultaneously desorbing As(V) and transforming Mn 2+ into HMO again. During a 10-cyclic adsorption-regeneration assay, Zr-Mn@N201 could steadily reduce As(III) from 500 μg/L to < 10 μg/L with negligible HMO loss (<0.3%) in each run. In fixed-bed assays, the integration of HMO increased the effective treatment amounts of the Zr-Mn@N201 column toward the realistic groundwater by ∼ 11.5 times over the single nano-HZO ( i.e. , HZO@N201) column, reaching to ∼ 4600 bed volume with < 1% HMO loss.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Ming-Kun Ke,Gui-Xiang Huang,Shu-Chuan Mei,Zhao-Hua Wang,Ying-Jie Zhang,Tian-Wei Hua,Li-Rong Zheng,Han-Qing Yu
As one of the extensively used feed additives in livestock and poultry breeding, p-arsanilic acid (p-ASA) has become an organoarsenic pollutant with great concern. For the efficient removal of p-ASA from water, the combination of chemical oxidation and adsorption is recognized as a promising process. Herein, hollow/porous Mn–Fe-mixed oxide (MnFeO) nanocubes were synthesized and used in coupling with peroxymonosulfate (PMS) to oxidize p-ASA and remove the total arsenic (As). Under acidic conditions, both p-ASA and total As could be completely removed in the PMS/MnFeO process and the overall performance was substantially better than that of the Mn/Fe monometallic system. More importantly, an interface-promoted direct oxidation mechanism was found in the p-ASA-involved PMS/MnFeO system. Rather than activate PMS to generate reactive oxygen species (i.e., SO4·–, ·OH, and 1O2), the MnFeO nanocubes first adsorbed p-ASA to form a ligand–oxide interface, which improved the oxidation of the adsorbed p-ASA by PMS and ultimately enhanced the removal of the total As. Such a direct oxidation process achieved selective oxidation of p-ASA and avoidance of severe interference from the commonly present constituents in real water samples. After facile elution with dilute alkali solution, the used MnFeO nanocubes exhibited superior recyclability in the repeated p-ASA removal experiments. Therefore, this work provides a promising approach for efficient abatement of phenylarsenical-caused water pollution based on the PMS/MnFeO oxidation process.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Lin Fan,Xuemei Wang,Zhen Zhang,Rao Peng,Weibo Li,Dong Xu,Xinzhen Du,Xiaoquan Lu
Methyl parathion (MP) is a highly toxic organophosphorus pesticide and poses a serious threat to food safety and public health. Herein, an integrated sensing platform combining hollow Mn-doped ZIF-67 with carboxylated carbon nanotubes to form a heterojunction (H-Mn/ZIF-67@COOH-CNTs) was successfully fabricated for sensitive recognition and ultrafast removal of MP. The constructed sensing platform demonstrated excellent analytical performance for MP under optimized conditions, featuring a broad linear range of 0.3–100 μM and a low detection limit of 0.024 μM. Furthermore, H-Mn/ZIF-67@COOH-CNTs achieved rapid removal of MP. The Langmuir fitting yielded a theoretical maximum adsorption capacity of 584.8 mg·g −1 , while a removal efficiency of 92.52% was achieved within 5 min. This research provides a reliable platform for the sensitive detection of MP in fruits and vegetables and its rapid removal from aqueous solutions, while offering novel insights for designing high-performance electrocatalysts in environmental monitoring and food safety testing.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·487-492
·
IF 1.798
Zhang Xinxiu,Liu Jinsong,Zhu Kongjun,Wang Jing,Li Ziquan,Qiu Jinhao
High-quality lead-free piezoelectric x Mn-doped (K 0.48 Na 0.52 ) 0.985 Li 0.015 NbO 3 films (KNLN; x = 0, 0.01, 0.02, 0.03) were successfully deposited onto Pt(111)/Ti/SiO 2 /Si(100) substrates by sol–gel method. Effects of Mn substitution on the microstructure, dielectric properties, ferroelectric properties, and leakage current of the KNLN films were investigated in detail. Mn-doping can significantly improve the ferroelectric properties and decrease the leakage current of KNLN films. Optimal dielectric properties were obtained in films doped with 2 mol% Mn, whose dielectric constant and dielectric loss at 1 kHz were 875 and 0.030, respectively. In addition, well-saturated ferroelectric P - E hysteresis loop with large remanent polarization (2 P
r ) and coercive field ( E
c ) of 22.5 μC/cm 2 and 65 kV/cm were obtained in 2 mol% Mn-doped KNLN film at an applied electric field of 200 kV/cm.
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MATERIALS SCIENCE & ENGINEERING R-REPORTS
·
2024
·
IF 31.6
Peilin Cao,Cong Wang,Shichao Niu,Zhiwu Han,Linpeng Liu,Ji’an Duan
Highly sensitive flexible force sensors enable precise detection of underwater signals for monitoring biological activity, environmental conditions, and vehicle movement. Multilayer stack assembly and micro/nano structure array are often seen in most force/pressure sensors which are toughly hard to control the interlayer spacing and micro/nano structures alignment precisely, resulting in poor consistency and stability. Herein, we first reported a new force sensor with a nature-inspired minimalistic architecture, addressing such issues in an elegant and surprising approach by using a single-layer arched functional membrane with one microgroove. Inspired by the scorpions’ slit sensilla and mantis’ campaniform sensilla, a highly sensitive and waterproof flexible force sensor was fabricated. It is demonstrated that the force sensor has a sensitivity of 27.6 N −1 , a high force resolution (1 mN), a fast response time of 70 ms, excellent stability over 5000 cycles and linearity (0.996), and a small force detection limit (≤ 1 mN), showing great potential in underwater environment sensing and motion monitoring of vehicles. This novel but minimalistic architecture provides a new direction in the development of sensors with advanced performance.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 8
·1-11
·
IF 2.8
Yang Zhengyu,Jin Wan
The great attention of rechargeable Zn-air battery has motivated extensive research on the development of inexpensive, highly efficient, and robust noble-metal-free bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this work, Mn-N-C-950 single-atom catalyst with biomass aerogel as precursor was successfully synthesized. The resulting Mn-N-C-950 exhibited excellent bifunctional catalytic performance for ORR ( E 1/2 = 0.843 V) and OER ( E j=10 = 1.56 V) in alkaline electrolytes, which can compete with previously reported bifunctional electrocatalysts. In addition, compared to the Pt/C + RuO 2 mixed catalyst, this bifunctional catalyst can endow the self-made zinc-air battery with better power density (114.1 mW/cm 2 ) and cycle stability (105.5 h), demonstrating its potential feasibility in practical applications of rechargeable metal air batteries.
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DESALINATION
·
2026
·
IF 9.9
Hongru Zhou,Zeying Ji,Yuxuan Xie,Shaoxian Song,QingMiao Wang,Jianbo Li,Feifei Jia
Surface spinel reconstruction on Li-rich Mn oxide mitigates Jahn-Teller distortion and Mn dissolution, 87% after 80 cycles. • S-LMCN enables rapid Li extraction with 42.25 mg g−1 capacity in 40 min, which demonstrates exceptional kinetics. • The heterostructure reduces the activation energy barrier for Li + charge transfer by 23.98% and it significantly decreases the charge-transfer resistance and facilitating interfacial Li + transport. • The S-LMCN in HCDI enabled highly selective lithium extraction, with an energy consumption as low as 2.07 kWh per Manganese-based electrodes for electrochemical lithium extraction from salt-lake brines are plagued by structural instability induced by the Jahn–Teller effect and poor electronic conductivity. These challenges result in significant capacity degradation and high energy costs for extracting Li + selectively. To tackle these issues, this work investigates a lithium-rich manganese-based layered-spinel heterostructure combined with a low-energy hybrid capacitive deionization system. The heterostructure establishes effective pathways for Li + transport to improve selectivity even in low-quality brines, while also reducing manganese dissolution caused by the Jahn–Teller effect and ensuring long-term cycling stability. Specifically, with these dedicated Li + transport channels in place, the energy barrier for electrochemical lithium extraction, as reflected by the activation energy (Ea) for Li + charge transfer, is reduced by 27.34% (from 29.70 to 21.58 kJ mol −1 ). This reduction facilitates a rapid, high-capacity uptake of 42.25 mg g −1 within 40 min. Furthermore, in comparison to the layered parent material, manganese dissolution is suppressed from 35.72% to 11.74%, resulting in an absolute reduction of 23.98 percentage points, even after undergoing 80 cycles. Download: Download high-res image (405KB) Download: Download full-size image
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ACS Nano
·
2026
·
IF 17.3
Yuanyuan Liu,Wanyue Sheng,Rui Cao,Hanxiao Chang,Jintao Liu,Mingqi Li,Sridhar Komarneni,Qiwen Ran
High-voltage (>4.3 V) P2-type Mn-based layered oxides have emerged as promising cathode materials for sodium-ion batteries (SIBs), yet its practical application is impeded by irreversible oxygen redox reaction (ORR), Jahn–Teller distortion, and microcrack formation. Herein, an innovative high configurational entropy engineered hollow microsphere of Na0.67Li0.18Co0.08Mn0.71Mg0.13Cu0.08O2 (HEHM-NMO) as cathode material is proposed to realize stress self-dissipation and sustainable cationic/anionic redox, thereby endowing wide-temperature (−10–60 °C) workability for SIBs. It is found that the high configurational entropy enhances the electronic structure disorder (ESD) for impeding undesired oxygen escape and also optimizes the orbital hybridization (O 2p–Mn 3d) to induce reversible ORR (O2–/O2n–). By coupling high configurational entropy with hollow microspheres, spontaneous stress dissipation in HEHM-NMO is achieved during the cycling process. As a result, the HEHM-NMO cathode can provide an ultrahigh initial charge capacity of 171.7 mA h g–1 with an initial Coulombic efficiency of 92.9% at 1.5–4.5 V and still enable a retention of 85.8% after 300 cycles at 2C. Notably, it also shows a wide-temperature (−10–60 °C) workability, delivering a capacity of 152.0 mA h g–1 at −10 °C and 192.7 mA h g–1 at 60 °C (average decay: 0.12% per cycle). This work provides atomic-level insights into entropy-dominant structural and electronic regulation for activating reversible oxygen redox.
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DESALINATION
·
2025
·
IF 9.8
Xifan Li,Xin Li,Mingmei Zheng,Jialin Shi,Lu Yang,Yushun Yang,Guijing Chen,Shengchi Bai,Xiao Lin,Wen Liu,Baicang Liu
The transition in the global energy structure has significantly increased the demand for new energy resources, particularly lithium. To efficiently recover lithium from shale gas wastewater, this study developed an innovative blended adsorbent granule combining crown ether (CE) polymer backbones integrated with Mn-based lithium-ion sieve to maximize lithium adsorption sites. The CE-based adsorbent featured a porous, honeycomb-like interior structure and a high specific surface area of 15.20 m 2 /g, with Mn-based adsorbent uniformly dispersed within the CE polymer matrix. Lithium adsorption performance was systematically evaluated through adsorption isotherms, kinetics, selectivity and reusability tests. The CE-based adsorbent exhibited a lithium adsorption capacity of 17.04 mg/g, recovering over 82.7 % of lithium, with a partition coefficient reaching 1686.75 mL/g, outperforming the PVC-based counterpart. Moreover, the adsorbent showed excellent selectivity for lithium, with a Li/Na separation factor of 421.80. In fixed-bed adsorption-desorption experiments, the CE-based adsorbent processed shale gas wastewater volume up to 100 times its own bed volume, concentrating lithium ions by a factor of 5. To better understand the extraction mechanisms and selectivity, density functional theory calculations were conducted, including optimized structures, molecular orbitals, charge transfer and stabilization energy. Compared to Na + , the CE polymer preferential adsorbed Li + ion, which occupied the crown ether ring core, exhibited shorter O Li bond lengths, greater charge transfer and stabilization energy. This study provides a novel strategy for advancing lithium adsorption materials and presents promising potential for efficient lithium recovery from complex wastewater sources.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Cuirong Yan,Xiunan Cai,Zhongqiu Luo,Qingxia Ouyang,Xintao Zhou
Heterogeneous Fenton-like catalytic oxidation is a promising technology for eliminating refractory organic pollutants, yet precise regulation of its intrinsic pathways (radical or non-radical) remains challenging. In this study, copper smelting slag was employed as a sustainable precursor to synthesize a nitrogen/manganese co-doped iron-based transition metal silicate (N/Mn-Fe-TMSs) catalyst for peroxymonosulfate (PMS) activation. The study demonstrates that Mn doping at Fe sites induces local lattice distortion and charge enrichment in the two-dimensional nanosheet architecture, and increases the d-band electron density of Fe sites, thereby enhancing PMS adsorption. The adsorbed PMS undergoes peroxy bond polarization and cleavage at these electron-enriched sites, with subsequent electron transfer to the metal centers, efficiently promoting singlet oxygen ( 1 O 2 ) generation. Additionally, nitrogen introduction transforms Me–O into unsaturated Me–N coordination, optimizing the d-band center of Fe sites. This modification significantly lowers the activation energy for PMS deprotonation and facilitates the formation of high-valent metal-oxo species. Consequently, the degradation pathway shifts from being predominantly radical-driven (74.5%) to a non-radical-dominated process (64.2%). Owing to these synergistic effects, the N/Mn-Fe-TMSs/PMS system achieves 99.3% removal of butyl xanthate within 15 min, exhibiting a degradation rate 56.4 times faster than that of the undoped system. Furthermore, the system exhibited remarkable resistance to interference from co-existing ions, exceptional structural stability, and excellent reusability. This study presents a sustainable and cost-effective approach for valorizing copper slag while advancing the design of non-radical-driven PMS activation systems for efficient and durable wastewater treatment.
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PubMed
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xiao Zhou,Yabo Wang,Xuqian Wang,Yongkui Zhang
Peroxymonosulfate (PMS) activation technology represents an efficient approach to generate reactive oxygen species for treating pharmaceutical pollutants, and the fabrication of effective catalysts is of great significance for PMS activation technology. In this study, iron-manganese (Fe-Mn) layered double oxides (LDO) with flaky structure formed by metal oxide nanoparticles were synthesized by coprecipitation-calcination method and used to activate oxidant PMS to generate reactive oxygen species so as to realize the degradation of sulfathiazole (STZ). Benefiting from the well-dispersed structure and synergistic effect between bimetallic oxides, about 90% of STZ (20 mg L −1 ) could be removed with the dosage of catalyst (LDO-400, 0.4 g L −1 ) and PMS (0.4 g L −1 ) in 40 min catalysis process. Quenching experiments and in-situ electron paramagnetic resonance (EPR) analysis revealed that radical pathways dominated by surface-bound SO 4 − • and •OH were involved in the removal of STZ in LDO-400/PMS system. Besides, EPR and linear sweep voltammetry (LSV) analysis indicated the non-radical pathways containing 1 O 2 and electron transfer also contributed to STZ degradation. Five consecutive cycles were conducted to prove the stability and reusability of LDO-400. The intermediates in the STZ degradation process were identified to propose the STZ degradation pathways. Particularly, ecological structure-activity relationship (ECOSAR) predicted the relatively low ecological risk of LDO-400/PMS system for STZ degradation. This study not only proves the advantages of synergistic effect between bimetallic oxides, but also enriches the design strategy of environmental remediation.
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