SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Yi Gu,Yang Jiao,Ya Ruan,Jing Yang,Yaling Yang
Herein, a nanocomposite of Cu,Ce-containing phosphotungstates (Cu,Ce-PTs) with outstanding laccase-like activity was fabricated via a one-pot microwave-assisted hydrothermal method. Notably, it was discovered that both Fe 3+ and Cr 6+ could significantly enhance the electron transfer rates of Ce 3+ and Ce 4+ , along with generous Cu 2+ with high catalytic activity, thereby promoting the laccase-like activity of Cu,Ce-PTs. The proposed system can be used for the detection of Fe 3+ and Cr 6+ in a range of 0.667–333.33 μg/mL and 0.033–33.33 μg/mL with a low detection limit of 0.135 μg/mL and 0.0288 μg/mL, respectively. The proposed assay exhibits excellent reusability and selectivity and can be used in traditional Chinese medicine samples analysis.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Sheng Zhong,Bin He,Shuang Wei,Ruirui Wang,Ruirui Zhang,Ruixia Liu
Electrocatalytic glycerol oxidation reaction to produce high-value organic chemicals has research significance for managing the overproduction of glycerol and handling the energy crisis. Herein, a copper-based self-supporting catalytic electrode with a dynamic Fe-O-Cu optimized coordination (Fe-CuO x /CF) was prepared. The oxygen-bridged asymmetric coordination structure (Fe-O-Cu) optimized the electronic configuration and promoted the formation of the crucial intermediate species. After Fe was embedded in the lattice of copper oxides, a remarkable enhancement in the adsorption capacity of OH - and glycerol was confirmed. As a result, Fe-CuO x /CF exhibited an excellent production capacity of formate, with high faradaic efficiency and selectivity values of 93.65 % and 95.10 %. Concurrent production of formate and high purity hydrogen was achieved in the double-electrode flow electrolyzer. This work provides guiding significance for the optimization of the catalytic coordination and the design of high-efficiency transition metal-based catalysts for electrooxidation of biomass platform molecules.
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JOURNAL OF POROUS MATERIALS
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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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LANGMUIR
·
2024
·
IF 3.7
Jiajia Wan,Di Sun,Peng Li,Junjun Huang,Zhenming Chen
With the frequent increase and update of electromagnetic interference (EMI) shielding materials, a low-resolution material that can absorb most electromagnetic waves, thereby effectively reducing the secondary pollution, is urgently needed. However, the excellent performance, flexibility, and low cost of these methods are usually incompatible with current reports. To address the above dilemma, we reported a facile solution for fabricating a low-reflection and high-performance EMI shielding composite by means of electroless nickel plating (EP-Ni), electroless copper plating (EP-Cu), annealing, and coating with a polydimethylsiloxane (PDMS) polymer with the structure of a Ni@Cu tube encapsulated with PDMS. The results indicate that the active groups on vegetable wool can act as active sites for the absorption of the Pd catalyst, thereby catalyzing the reduction of Ni2+, Cu2+, and the subsequent deposition on the plant fiber surface. Notably, the Ni@Cu-encapsulated plant fibers decreased during annealing at 100 °C. According to the segregated network and synergistic effect of the porous structure, the as-fabricated EMI shielding material demonstrated high absorption and low reflection, in which the power coefficient of the T value was approximately 0.0001, the R value was about 0.1764 (a decrease of 27.5% compared that of EP-Ni cotton), and the A value was approximately 0.8235.
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INORGANIC CHEMISTRY
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2024
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IF 4.3
Jie Hou,Jun Chen,Cheng Luo,Juntao Li,Cheng Li,Ruiling Zhang,Jianyong Liu,Peigeng Han
Zero-dimensional (0D) metal halides have emerged as excellent luminescent materials for optical and optoelectronic applications. Especially environmentally friendly ternary zinc halides have recently drawn increasing attention. Herein, we present the codoping of Cu+ and Mn2+ ions into 0D Cs2ZnBr4 single crystals (SCs), which show bright PL emission and high stability. Adjusting the Cu+/Mn2+ ratio can make the photoluminescence quantum yield (PLQY) exceed 90%, which is much higher than that of the single-ion doped sample. The efficient PL is determined by a combination of Cu+–Mn2+ competitive interaction, Cu+–Mn2+ energy transfer, and Cu+–Mn2+ synergistic passivation. More interestingly, the codoped sample shows a better scintillation performance with a low detection limit of 52 nGyair/s and a sensitive spatial resolution of 13.2 lp/mm. We further explore the promising applications of Cu+–Mn2+-codoped Cs2ZnBr4 SCs for anticounterfeiting and X-ray imaging. These results not only help to grasp the excited-state photophysical processes of 0D codoped metal halides but also provide a new way for the design and development of environmentally friendly luminescent materials.
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Materials Today Energy
·
2025
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IF 8.6
Dandan Chen,Fengxia Yang,Mei Yang,Wenming Chai,Weidong Zhu,Chunfu Zhang,Yun Zhao,Yan Li
Perovskite and Cu(InGa)Se 2 (CIGS) tandem solar cells are emerging as an exciting prospect to achieve high-performance, cost effective, and lightweight all-thin-film photovoltaics, wherein perovskite solar cells (PSCs) fabricated using high-quality wide-bandgap perovskite films are critical to realize the high-efficiency PSC/CIGS tandem solar cells. Herein, a stepwise dimethyl sulfoxide (DMSO) solvent-annealing strategy is proposed to fabricate wide-bandgap (1.68 eV) Cs 0.15 FA 0.65 MA 0.2 PbI 2.4 Br 0.6 films via stepwise heating recipe, that is annealed at 100 °C firstly and then 80 °C. This modified solvent-annealing method makes for the Cs 0.15 FA 0.65 MA 0.2 PbI 2.4 B r0.6 films with full coverage, large grains, improved crystallinity, and free of impurities. Opaque PSCs with the desired Cs 0.15 FA 0.65 MA 0.2 PbI 2.4 B r0.6 films exhibit a champion power conversion efficiency (PCE) of 21.66 % and excellent stability. Furthermore, using an optimized IZO transparent electrode, the semitransparent PSCs with an impressive PCE of 21.26 % and a high bifaciality factor of 92.2 % are fabricated. These PSCs can further enable the four-terminal (4-T) PSC/CIGS tandem solar cells with a summed PCE of 29.36 %, surpassing of most the similar tandem solar cells reported earlier.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Hong Gao,Chen Wang,Wenqi Zhang,Guowei Shan,Weixing Li
Purification of glutathione (GSH) from fermentation broth is crucial for production process. Here, we built a new nanofiltration (NF) membrane to separate glutathione from amino acids, which mainly refer to glutamate (Glu) and glycine (Gly). An alendronic acid (AA)/Cu-MOF-74 nanorods arrayed interlayer is constructed on the substrate. The designed interlayer can adsorb a significant amount of piperazine (PIP), enhancing the reaction crosslinking degree of interfacial polymerization. The Cu-MOF-74 morphology contributes a wrinkled membrane surface structure with large specific surface area. The optimal NF membrane achieved the permeability of 7.13 L·m −2 ·h −1 ·bar −1 with high selective separation factor of 20.06, 25.88, 25.46 for GSH/Glu, GSH/Gly and GSH/NaCl, respectively. This work offers a potential solution to develop high-performance NF membranes for purification of biological molecules.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
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IF 14.7
Ye Runping,Ma Lixuan,Mao Jianing,Wang Xinyao,Hong Xiaoling,Gallo Alessandro,Ma Yanfu,Luo Wenhao,Wang Baojun,Zhang Riguang,Duyar Melis Seher,Jiang Zheng,Liu Jian
CO 2 hydrogenation to chemicals and fuels is a significant approach for achieving carbon neutrality. It is essential to rationally design the chemical structure and catalytic active sites towards the development of efficient catalysts. Here we show a Ce-CuZn catalyst with enriched Cu/Zn-O V -Ce active sites fabricated through the atomic-level substitution of Cu and Zn into Ce-MOF precursor. The Ce-CuZn catalyst exhibits a high methanol selectivity of 71.1% and a space-time yield of methanol up to 400.3 g·kg cat −1 ·h −1 with excellent stability for 170 h at 260 °C, comparable to that of the state-of-the-art CuZnAl catalysts. Controlled experiments and DFT calculations confirm that the incorporation of Cu and Zn into CeO 2 with abundant oxygen vacancies can facilitate H 2 dissociation energetically and thus improve CO 2 hydrogenation over the Ce-CuZn catalyst via formate intermediates. This work offers an atomic-level design strategy for constructing efficient multi-metal catalysts for methanol synthesis through precise control of active sites.
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Sustainability
·
2024
·Vol. 16
·期 7
·3009
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IF 3.3
Jiahui Wang,Zhen Xi,Bo Niu,Ruitong Gao,Zhenming Xu
Deep and efficient debromination is a critical step in achieving environmentally friendly recycling and ensuring the sustainability of waste-printed circuit boards (WPCBs) because of their high toxicity and carcinogenicity. To this end, this study used a copper–iron (Cu/Fe) bimetal as a debromination agent to remove bromides from WPCBs using in situ catalytic pyrolysis technology. The results show that the maximum debromination efficiency was 97.14% under the following conditions: a Cu mole ratio of 0.20 (Cu/Fe-0.20), a Cu/Fe-0.20 dosage of 0.4, a pyrolysis temperature of 600 °C, and a retention time of 10 min. The main bromine species in pyrolysis oil and gas were bromophenol, bromomethane, HBr, and Br2. The conversion of bromine species and the debromination of the Cu/Fe-0.20 bimetal were analyzed in real time using a thermogravimetry-coupled Fourier transform infrared and mass spectrometer (TG-FTIR-MS). Using the Cu/Fe bimetal synergistic effect, we determined that the debromination mechanism could be used for bromide conversion and fixing. The Cu in the Cu/Fe-0.20 transformed the organic Br (bromophenol and bromomethane) into inorganic Br (HBr and Br2) by providing empty orbitals for lone pairs of electrons. Then, the generated HBr and Br2reacted with Fe in the Cu/Fe-0.20 and were fixed in pyrolysis residue. This study provides theoretical support and a practical method for WPCB deep debromination and recycling.
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BIOMEDICINE & PHARMACOTHERAPY
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2024
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IF 6.9
Di Meng,Shuoye Yang,Lin Ju,Jinpeng Wang,Yanan Yang,Lu Zhang,Lan Cui
Currently, traditional monotherapy for cancer often results in indiscriminate attacks on the body, leading to the emergence of new health problems. To confront these challenges, multimodal combination therapy has become necessary. However, how to develop new smart nanomaterials through green synthesis methods, delivering drugs while simultaneously synergizing multimodal combination therapies for tumor treatment, remains a topic of great significance. In this study, a biomimetic composite nanomaterial (RM-Cu/P) composed of mesoporous polydopamine (MPDA) as the core and red blood cell membranes (RBCMs) as the shell was synthesized as a drug carrier to deliver doxorubicin (DOX) while achieving synergistic chemotherapy, photothermal and chemodynamic therapy (CT/PTT/CDT). Herein, the nanoparticles were extensively characterized to examine their morphological characteristics, elemental composition, and drug-carrying capacity. Notably, the coating of RBCM reduced the toxicity of the RM-Cu/P@DOX nanoparticles, improved their targeting ability and prolonged their circulation time in vivo . The Cu-doped nanoparticles were capable of initiating a Fenton-like reaction to generate reactive oxygen species (ROS) for CDT, while the photothermal conversion efficiency (η) reached 45.20 % under NIR laser irradiation. Subsequently, the particles were examined by in vivo and in vitro experimental studies in cytotoxicity, cellular uptake, ROS levels, lysosomal escape, and mouse tumor model to evaluate their potential application in antitumor. Compared with monotherapy, the RM-Cu/P@DOX nanoparticles had multiple-stimulation response properties under redox, pH, and NIR, which exhibited the advantage of combined trimodal therapy, resulting in remarkable synergistic antitumor efficacy. In conclusion, this innovative platform exhibited promising applications in smart drug delivery and synergistic treatment of cancer.
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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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