APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Xin Liu,Liping Yang,Li Chen,Shuxia Li,Peng Li,Yongrong Sun,Ning Kang,Chenglong Wang
It is still challenged to propose a straightforward and in-situ growth method of fabricating perovskite-type metal oxide films with dense and uniform surface coverage. This paper presents a simple strategy to prepare LaBO 3 (where B = Ni, Co, Fe, Mn) films by metal oleate (MO) route, in which metal oleates (La(OA) 3 and (B(OA) x , x = 2 or 3) serve as effective ligands to inhibit the self-aggregation among crystal grains. The as-prepared LaNiO 3 film with uniform and dense surface shows a reduced contact angle (31.5° vs 51.2°) and surface roughness (Ra = 14.2 vs 23.9 nm) compared with film prepared by Sol-gel (SG) method. Finally, the LaNiO 3 film by MO route is successfully employed as hole transport layer (HTL) in perovskite solar cells (PSCs) to obtain a power conversion efficiency (PCE) up to 15.62 %, which is 1.54 times that of PSCs by SG method. This work opens an avenue for fabricating LaBO 3 films with dense and uniform surface coverage by MO route.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chen-Yan Hu,Zi-Yi Dong,Zheng-Yu Dong,Yi-Hui Wu,Sheng-Jie Ji,Li-Li Hu,Xin-Yu Yang,Hao Liu,Bin Xu
The present study investigated the mechanism of manganese ion (Mn(II))-activated periodate (PI) for rapid removal of sulfadiazine (SDZ). The Mn(II)/PI system showed excellent SDZ degradation results with 99.8 % degradation efficiency within 2 min at pH = 5.5. Mechanism study reveals that the degradation of SDZ in the Mn(II)/PI system takes place mainly through an electron transfer process. Mn(II) can be oxidized by PI to formed the in-situ MnO 2 , followed by the generation of MnO 2 -PI complex. Electrochemical methods have confirmed that the generated MnO 2 -PI complex significantly contributes to the degradation of pollutants. MnO 2 -PI mediates the transfer of electrons from SDZ to PI surface through surface vacancies, thereby achieving efficient degradation of pollutants. p -methoxyphenyl sulfone (PMSO) is used as a probe compound, and almost 90 % of PMSO is converted into PMSO 2 in the Mn(II)/PI/SDZ system, manifesting that excessive PI may oxidize active Mn(IV) to Mn(V). And the generated Mn(V) also contributes to the SDZ degradation. The SDZ degradation pathway is proposed and the transformation of iodine species is detected. The final iodine species in the system are iodate. The chloride culture experiment has confirmed that the production of organic iodine is very low, indicating no significant health risks. This study reveals mechanism of periodate-based process, providing theoretical and technical implementation guidelines of periodate in water treatment.
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Catalysts
·
2024
·Vol. 14
·期 7
·397
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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.
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Asian Journal of Pharmaceutical Sciences
·
2024
·
IF 10.7
Shengnan Huang,Chenyang Zhou,Chengzhi Song,Xiali Zhu,Mingsan Miao,Chunming Li,Shaofeng Duan,Yurong Hu
Postoperative tumor recurrence remains a predominant cause of treatment failure. In this study, we developed an in situ injectable hydrogel, termed MPB-NO@DOX + ATRA gel, which was locally formed within the tumor resection cavity. The MPB-NO@DOX + ATRA gel was fabricated by mixing a thrombin solution, a fibrinogen solution containing all-trans retinoic acid (ATRA), and a Mn/NO-based immune nano-activator termed MPB-NO@DOX. ATRA promoted the differentiation of cancer stem cells, inhibited cancer cell migration, and affected the polarization of tumor-associated macrophages. The outer MnO 2 shell disintegrated due to its reaction with glutathione and hydrogen peroxide in the cytoplasm to release Mn 2+ and produce O 2 , resulting in the release of doxorubicin (DOX). The released DOX entered the nucleus and destroyed DNA, and the fragmented DNA cooperated with Mn 2+ to activate the cGAS-STING pathway and stimulate an anti-tumor immune response. In addition, when MPB-NO@DOX was exposed to 808 nm laser irradiation, the Fe-NO bond was broken to release NO, which downregulated the expression of PD-L1 on the surface of tumor cells and reversed the immunosuppressive tumor microenvironment. In conclusion, the MPB-NO@DOX + ATRA gel exhibited excellent anti-tumor efficacy. The results of this study demonstrated the great potential of in situ injectable hydrogels in preventing postoperative tumor recurrence.
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JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Zhang Wenhui,Wu Xinbo,Wang Dazhi,Cai Weijie
As the frequency range of electronic devices gradually expands, exploring frequency insensitive electromagnetic wave adsorption (EWA) materials that can achieve effective absorption in all bands has aroused great interest. A series of Fe 1 − x S@C composite materials with three-dimensional conductive networks were successfully prepared in this work. In the preparation process, poly (aryl ether sulfone) with branched carboxylic (PAES-C) was selected as the skeleton and Fe 3+ ions were introduced via chemical adsorption. The main purpose of this work was to develop array porous composite materials with good EWA property. The work proposed a novel controllable method for preparing metal sulfides to explore the electromagnetic wave absorption. This routine was also developed to prepare other M x S@C composites (M = Fe, Cu, Mn). Compared to Mn x S@C and Cu x S@C composites, the RL min value of Fe 1 − x S@C-4 was − 40.6 dB at 13.52 GHz, and at a thickness of 1.5 mm the effective bandwidth reached 3.12 GHz. Furthermore, its effective absorption band covered Ku, X, and C radar bands at different thicknesses.
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Advanced Sustainable Systems
·
2025
·
IF 6.1
Wei Lin,Yulu Wu,Xinyu Hu,Peng Yang,Hong Wen,Tianfu Zhao,Lianbang Wang,Chaoqi Shen
A well-designed solvothermal approach has been employed to synthesize olivine LiMn 0.5 Fe 0.5 PO 4 (LMFP) cathode material with a nanoplate configuration. This method precisely controls crystal growth to achieve a high proportion of (010) facets while minimizing intrinsic defects. These modifications significantly enhance lithium-ion diffusion kinetics and optimize the electrochemical performance of LMFP. The nanoscale of the (010) facets and the reduced anti-site defect concentration in the MP-PRO sample functionalize jointly to promote lithium-ion transport during the long-cycle. Furthermore, the superior electrochemical performance is closely linked with significantly reduced impedance and enhanced Mn redox kinetics. Both theoretical calculations and experimental results indicate that the confinement effect induced by 1,3-propanediol directs facet orientation and confines nanoplate growth. Compared to the product synthesized using water (MP-H 2 O), the 1,3-propanediol-based sample (MP-PRO) delivers a high specific capacity of 130.7 mAh g −1 at 5C and demonstrates excellent cycling stability, with an 84.6% capacity retention after 1000 cycles. This study provides new insights into the kinetics of Mn redox in LMFP electrodes and reveals an effective electrode structure design to realize long-life high rate batteries.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Xingping Deng,Hua Yang,Dongye Zhao,Jingchun Guan,Zhengxuan Gu,Liang Zhang
Graphitic carbon nitride (g-C 3 N 4 ), a nitrogen-rich polymeric semiconductor, has gained significant attention as a photocatalyst . However, its potential to activate permonosulfate (PMS) has been somewhat limited. Prior research has demonstrated that manganese-doped g-C 3 N 4 can effectively activate PMS to degrade pollutants, with Mn 3+ playing a pivotal role. Consequently, enhancing the Mn 3+ content within the system is of paramount importance. In this study, we developed a novel class of manganese‑copper doped g-C 3 N 4 materials using a hydrothermal-calcination process. The optimized material, denoted as Mn 5 Cu 5 -CN, was synthesized at a Mn/Cu molar ratio of 1:1. When applied to degrade a model contaminant, acetaminophen (ACP), the Mn 5 Cu 5 -CN/PMS system demonstrated remarkable efficiency, degrading nearly 20 mg/L of ACP within 30 min (material dosage = 0.4 g/L, PMS concentration = 2.0 mM). The Mn 5 Cu 5 -CN exhibited favourable performance across a broad pH range. Singlet oxygen ( 1 O 2 ) was identified as a major player in the degradation of ACP. X-ray photoelectron spectroscopy (XPS) analyses revealed that the cyclic redox reactions of Mn 3+ /Mn 4+ and Cu + /Cu 2+ led to the abundant generation of 1 O 2 . Superoxide (O 2 •- ) was identified as an important intermediate product in these processes. Additionally, the g-C 3 N 4 present in the material also facilitated the generation of reactive oxygen species (ROS). This study provides a fresh perspective on the utilization of g-C 3 N 4 for pollutant degradation, highlighting the potential of Mn Cu doped g-C 3 N 4 materials in environmental remediation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuang Wu,Yangli Cui,Lan Liang,Wenjie Gao,Zhen Yu,Zhanjun Cheng,Beibei Yan,Guanyi Chen,Ning Li
Heterogeneous catalyst reuse and the effectiveness of hydrogen peroxide (H 2 O 2 )-based advanced oxidation processes under near-neutral conditions remain an obstacle in wastewater remediation. Herein, we put forward a versatile catalytic membrane with Cu-doped MnO active layer anchoring on the polydopamine-modified electrospinning polyvinylidene fluoride (PDA@PVDF) base. The Cu-MnO@PDA@PVDF membrane was conferred admirable sulfamethoxazole (SMX) reduction (over 90% within 90 min) and clogging alleviation (relative flux recovery to 0.98) capabilities via in situ H 2 O 2 activation at pH 8, which was slightly affected by actual water background. Electron paramagnetic resonance (EPR) and trapping tests unveiled the joint contribution of • OH, O 2 •− and 1 O 2 , with • OH exerting the supreme role in SMX oxidation. The inherent characteristics of dual Mn-Cu centers on the membrane surface for facilitation of electron transfer, H 2 O 2 adsorption and barrierless dissociation to • OH were further elucidated by electrochemical measurements and density functional theory (DFT) computation. Comprehensively, this study proposes a facile procedure and insights into engineering catalytic membrane coupled H 2 O 2 strategy for refractory organic treatment at ambient conditions.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Donghui You,Kailei Li,Yuanyuan Chang,Ruiqin Wang,Rongxing He,Lei Zhou,Ming Li
Eco-friendly organic–inorganic hybrid metal halides (OIMHs) are widely recognized as promising candidates for next-generation semiconductor materials. However, achieving inherent moisture stability in OIMHs remains a significant challenge due to the highly hygroscopic nature of the halide structures. In response, a strategy to precisely modify the organic cation (18-ACE: 4,13-diaza-18-crown 6-ether) was developed by introducing hydrophobic benzyl groups into 18-ACE, forming a protective layer that enhances the moisture stability of the OIMHs. Specifically, benzyl groups were incorporated into 18-ACE to create 18-ACE-Bn, which was then used as an organic component to construct zero-dimensional Mn-based (18-ACE)MnBr4 and (18-ACE-Bn)MnBr4·H2O, exhibiting photoluminescence quantum yields (PLQYs) of 68.18% and 97.17%, respectively. Notably, (18-ACE-Bn)MnBr4·H2O demonstrates exceptional moisture stability compared to (18-ACE)MnBr4, retaining 97% of its initial PLQY even after 180 days of exposure to 70% relative humidity. Molecular dynamics and density functional theory calculations indicate that this superior stability is attributed to the terminal benzyl groups embedded within the inorganic framework, forming a compact structure with abundant weak interactions. Leveraging the unique spectral characteristics of (18-ACE-Bn)MnBr4·H2O, a high-performance WLED with a wide color gamut of 125.2% NTSC (National Television Standard Committee) was developed, highlighting its potential for backlight display applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hongdian Chen,Chuanlan Xu,Lingtao Sun,Chaozhong Guo,Haifeng Chen,Chenyang Shu,Yujun Si,Yao Liu,Rong Jin
Applications of zinc-air batteries are partially limited by the slow kinetics of oxygen reduction reaction (ORR); Thus, developing effective strategies to address the compatibility issue between performance and stability is crucial, yet it remains a significant challenge. Here, we propose an in situ gas etching-thermal assembly strategy with an in situ -grown graphene-like shell that will favor Mn anchoring. Gas etching allows for the simultaneous creation of mesopore-dominated carbon cores and ultrathin carbon layer shells adorned entirely with highly dispersed Mn-N 4 single-atom sites. This approach effectively resolves the compatibility issue between activity and stability in a single step. The unique core–shell structure allows for the full exposure of active sites and effectively prevents the agglomerations and dissolution of Mn-N 4 sites in cores. The corresponding half-wave potential for ORR is up to 0.875 V (vs. reversible hydrogen electrode (RHE)) in 0.1 M KOH. The gained catalyst (Mn-N@Gra-L)-assembled zinc-air battery has a high peak power density (242 mW cm −2 ) and a durability of ∼ 115 h. Furthermore, replacing the zinc anode achieved a stable cyclic discharge platform of ∼ 20 h at varying current densities. Forming more fully exposed and stable existing Mn-N 4 sites is a governing factor for improving the electrocatalytic ORR activity, significantly cycling durability, and reversibility of zinc-air batteries.
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Advanced Science
·
2024
·Vol. 11
·期 25
·2401515
·
IF 14.3
Ziyan Yang,Qingzhou Wang,Huixin Yu,Qing Xu,Yuanyue Li,Minghui Cao,Rajendra Dhakal,Yang Li,Zhao Yao
Self-powered pressure detection using smart wearable devices is the subject of intense research attention, which is intended to address the critical need for prolonged and uninterrupted operations. Current piezoelectric and triboelectric sensors well respond to dynamic stimuli while overlooking static stimuli. This study proposes a dual-response potentiometric pressure sensor that responds to both dynamic and static stimuli. The proposed sensor utilizes interdigital electrodes with MnO 2 /carbon/polyvinyl alcohol (PVA) as the cathode and conductive silver paste as the anode. The electrolyte layer incorporates a mixed hydrogel of PVA and phosphoric acid. The optimized interdigital electrodes and sandpaper-like microstructured surface of the hydrogel electrolyte contribute to enhanced performance by facilitating an increased contact area between the electrolyte and electrodes. The sensor features an open-circuit voltage of 0.927 V, a short-circuit current of 6 µA, a higher sensitivity of 14 mV/kPa, and outstanding cycling performance (>5000 cycles). It can accurately recognize letter writing and enable capacitor charging and LED lighting. Additionally, a data acquisition and display system employing the proposed sensor, which facilitates the monitoring of athletes’ rehabilitation training, and machine learning algorithms that effectively guide rehabilitation actions are presented. This study offers novel solutions for the future development of smart wearable devices.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ling-ou Yang,Dongjie Tian,Xuelian Liu,Fangyuan Lin,Min Ye,Yiru Wang,Xi Chen
Copper iodide (CuI) clusters have continued been to arouse increasing attention in many fields due to their high cost-performance, abundant reserves, hypotoxicity and structural diversity. Despite the oxygen sensing capability of coordinate CuI clusters has been demonstrated, the ionic counterparts with better structural stability hold potential to construct more durable sensing platform. However, the optical applications of the ionic CuI clusters have been hindered largely by their prominently weak emission. With the progress of ion assembly in recent years, ionic CuI clusters with specific emission properties can be attainable. Herein, two ionic dinuclear CuI clusters with Mn(Ⅱ) crystal field are introduced through fabricating sensing films to exhibit their oxygen sensing performance for the first time. The results reveal that both sensing films presented good reversibility, fast response associated with wide linear responses in the range from 0 % to 90 % gaseous O 2 . When the sensing behaviors of the two clusters were compared, different I 0 /I 100 ratios of 6.6 and 2.1 are observed. Through investigating EPR spectra and time-resolved luminescence spectra , we highlight that different Mn(Ⅱ) crystal field intensity in corresponding clusters lead to distinct oxygen sensing behaviors. In our perception, the possible mechanism could offer new performance modulation strategy based on CuI clusters with multi-emission centers. Owing to the good structural stability of such materials, one of the clusters is used to demonstrate the dissolved oxygen sensing capability of the platform. The study constructs a stable sensing system and will pave the new way for optical application of the family of ionic CuI clusters.
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