MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Atiq Ur Rehman,Muhammad Anwar,Adil Khan,Kashif Ali Kalhoro,Chi Zhang,Yanke Zhang,Mohammadreza Shokouhimehr,Zhengchun Liu
Uric acid (UA) and dopamine (DA) are clinical biomolecules associated with various physiological and pathological processes. This study investigates the electrochemical sensing performance of UA and DA based on a dual-modified electrode with holey molybdenum disulfide (h-MoS 2 ) and electrodeposited nickel nanoparticles (NiNPs) GCE/ENi-hMoS 2 . To fabricate an electrochemical sensor, h-MoS 2 nanosheets were synthesized using a simple ultrasonic process from bulk MoS 2 for UA and DA detection. The electrochemical sensing performance of h-MoS 2 and NiNPs modified electrodes were characterized using techniques, such as cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Due to the synergetic contribution of h-MoS 2 and NiNPs, the sensor achieved remarkable sensitivity and also exhibited strong anti-inference ability. The sensor exhibited linear ranges between 100–9000 μM and 50–3600 μM, with low detection limits of 7.3 μM and 2.1 μM for UA and DA simultaneously. Additionally, the developed GCE/ENi-hMoS 2 -based electrochemical sensor exhibited high selectivity in the existence of interfering substances, including glucose and ascorbic acid with good stability. This study offers a reference for the fabrication of stable electrochemical sensors consolidated by two-dimensional materials for small-molecule detection.
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NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 36
·15870-15883
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IF 2.7
Chuhan Xing,Yaoyao Chen,Zhi Song,Boxia Liu,Xiayan Zhang,Jialu Liu,Yeqiong Huang,Dongxu Han
Norfloxacin (NOR) is a synthetic antibacterial agent that is extensively applied in the management of various infectious conditions. After entering the human body, most of it cannot be absorbed and is excreted, eventually reaching natural waters. At the same time, it promotes the generation of drug-resistant bacteria, which seriously threatens human health. In this study, a simple mechanical mixing method was employed to synthesize a Ni–MCM composite catalyst with excellent stability, which was utilized for the degradation of NOR. The effects of the mass ratio of Ni–MC to MCM-41, initial pH value, starting NOR concentration, catalyst dosage and inorganic anions on NOR degradation were studied. The findings indicate the superior degradation capability of Ni–MCM towards NOR under diverse conditions. Quenching experiment and electron paramagnetic resonance spectroscopy showed that when dissolved oxygen occupied the active site of the metal in the catalyst, more ˙O2− and 1O2 would be formed, and NOR would be degraded due to the interaction with the mixed system composed of ˙OH and SO4˙− and electron transfer, indicating that the degradation mechanism of the Ni–MCM system was dominated by non-free radicals. The utilization of the Ni–MCM nano-composite catalyst is a promising approach for the treatment of wastewater containing norfloxacin.
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CHINESE CHEMICAL LETTERS
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2024
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IF 9.4
Junyi Yu,Yin Cheng,Anhong Cai,Xianfeng Huang,Qingrui Zhang
Herein, the Cu(III) synthesized from copper plating effluent was developed for the first time to evaluate the onsite degradation performance of heavy metal complexes in the wastewater, thus achieving the purpose of “treating waste with waste”. The results indicated that synthetic Cu(III) presented the excellent decomplexation performance for Cu(II)/Ni(II)-organic complexes. The removal efficiency of Cu(II)/Ni(II)-EDTA significantly increased with increasing Cu(III) dosage, and the degradation of Cu(II)/Ni(II)-EDTA by synthetic Cu(III) system displayed highly pH-dependent reactivity. The radical quencher experiments confirmed that Cu(III) direct oxidation were mainly involved in the degradation of Cu(II)-EDTA. Additionally, the continuous decarboxylation process was proven to be the main degradation pathway of Cu(II)-EDTA in Cu(III) system. The coexisting substances (SO 4 2− , Cl − and fulvic acids) showed little impacts at low level for the removal of Cu(II)/Ni(II)-EDTA, while retarded the degradation of Cu(II)-EDTA slightly at high level, which features high selective oxidation. Encouragingly, it was also effective to remove Cu(II)/Ni(II)-EDTA from in treating actual Cu/Ni-containing wastewater through synthetic Cu(III) treatment.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Shuangxi Lin,Longchen Gong,Ning Zhao,Huibo Zhao,Feigang Zhao,Yang Bai,Zhenhua Li,Wen Liu
Modulating metal-support interactions is critical for improving catalytic activity and product selectivity for CO 2 hydrogenation. Such modulation can be achieved by modifying the metal nanoparticles as well as the supports. Here, we prepared a novel catalyst, in which Ni nanoparticles were dispersed on CeO 2 and hexagonal boron nitride (h-BN) hybrid supports. The introduction of h-BN to Ni/CeO 2 -BN effectively improves the dispersion of Ni nanoparticles. More importantly, the abundant Ni-CeO 2 interfacial sites with enriched oxygen vacancies are formed over h-BN edge sites. The dispersed Ni species are anchored on CeO 2 via a unique interfacial structure, with electron-rich Ni (Ni δ− ) species. At the interfacial sites on Ni/CeO 2 -BN, the synergy between oxygen vacancies and Ni δ− , which enhances CO 2 activation and H 2 dissociation, respectively, renders superior catalytic performance for CO 2 methanation. In situ DRIFTS suggests formate as key rate-limiting intermediates on Ni-CeO 2 sites, while the formation of B-H bonds further promotes hydrogen activation and subsequently the catalytic performance. The modulation of metal-support interactions by spatial confinement effect by BN offers a new paradigm for designing metal/oxide catalysts for chemical transformations that requires bifunctionality as CO 2 hydrogenation.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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IF 8
Rujiao Jiang,Baojun Yi,Qi Wei,Zhi He,Zhengshuai Sun,Jiayi Yang,Wenbin Hua
The use of Ni-based catalysts is a common method for eliminating tar through catalytic cracking. Carbon deposition is the main cause of deactivation in Ni/ZSM-5 catalysts, with filamentous MWCNTs being the primary form of carbon deposits. This study investigates the formation and evolution of CNTs during the catalytic process of biomass tar to explore the mechanism behind carbon deposition. The effect of the 9Ni/10MWCNTs/81ZSM-5 on toluene reforming was investigated through a vertical furnace. Gases produced by tar catalysis were evaluated through GC analysis. The physicochemical structure, properties and catalytic performance of the catalyst were also tested. TG analysis was used to assess the accumulation and oxidation reactivity of carbon on the catalyst surface. An analysis was conducted on the mechanism of carbon deposition during catalyst deactivation in tar catalysis. The results showed that the 9Ni/91ZSM-5 had a superior toluene conversion of 60.49%, but also experienced rapid and substantial carbon deposition up to 52.69%. Carbon is mainly deposited as curved filaments on both the surface and pore channels of the catalyst. In some cases, tip growth occurs where both carbon deposition and Ni coexist. Furthermore, specific surface area and micropore volume are reduced to varying degrees due to carbon deposition. With the time increased, the amount of carbon deposited on the catalyst surface increased to 62.81%, which gradually approached saturation, and the overall performance of the catalyst was stabilized. This situation causes toluene molecules to detach from the active sites within the catalyst, hindering gas release, which leads to reduced catalytic activity and further carbon deposition. It provides both a basis for the development of new catalysts and an economically feasible solution for practical tar reduction and removal.
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PubMed
高影响因子
Molecular Catalysis
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2025
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IF 4.9
Zong-Pin Fu,Qi-Jie Zhou,Yun-Peng Zhao,Yu-Fa Wu,Fang-Jing Liu,Mei Zhong,Jian Li,Jing Liang,Jing-Pei Cao
The high oxygen content and low calorific value of bio-oil make it unsuitable for direct production of high energy density fuels. To address this issue, the C-O-C, C-O-H, and C-C bonds in the oxygenated compounds of bio-oil can be modified through hydrodeoxygenation (HDO) reaction. In this study, we synthesized a series of efficient Ni-CoOx/Hβ-u catalysts by impregnating Hβ molecular sieve modified with urea under mild conditions. The catalytic HDO performance of these catalysts was evaluated using guaiacol and dealkalized lignin oil as substrates. The results indicate that the Ni-15CoOx/Hβ-u catalyst demonstrated superior activity. The suitable specific surface area and pore volume of the Ni-15CoOx/Hβ-u catalysts, as well as uniformly dispersed metal particles on their surface, increased the number of active sites available for HDO. Additionally, the presence of defective sites on the CoOx surface and acidic sites on the catalyst facilitate the breaking of intermediate C-O bonds (deoxygenation) and dehydration reactions. Utilizing the Ni-15CoOx/Hβ-u catalysts, guaiacol was completely converted to cyclohexane with 100% selectivity (at 180 °C, 1.0 MPa H 2 , 40 min). Furthermore, the phenolic compounds in bio-oil could also be transformed into cycloalkanes via the HDO process. These findings suggest that the Ni-15CoOx/Hβ-u catalyst has the potential to effectively hydrodeoxygenate bio-oil under mild reaction conditions.
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FUEL
·
2024
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IF 6.7
Xiao Chen,Rongrong Li,Zhengwen Hu,Ying Zhong,Deng Hu,Changhai Liang
The selective activation of targeted bonds within renewable biomass-derived furanic compounds for the production of high-value alkyl diols holds significant importance for biomass upgrading, necessitating well-defined catalysts and clearly defined catalytically active sites. Herein, 1,5-pentanediol is synthesized through the selective hydrogenolysis of furfural-derived tetrahydrofurfuryl alcohol utilizing Ni-Co/La(OH) x bimetallic catalysts. The La(OH) x with abundant defect sites polarizes Ni-Co alloy for heterocracking of H 2 , as well as leads to expose more interfacial NiCo-O V -La 3+ sites. By harnessing the synergistic interplay between the alloy sites and the interfacial sites, the optimized Ni 4 Co 1 /La(OH) x bimetallic catalyst markedly enhances the adsorption of –OH groups in tetrahydrofurfuryl alcohol and facilitates the selective assault of active H species on the C-O-C bonds within tetrahydrofuran rings. This approach markedly elevates the selective hydrogenolysis of tetrahydrofurfuryl alcohol to 1,5-pentanediol, attaining an exceptional selectivity of 88.6 % with a conversion of 98.1 % for tetrahydrofurfuryl alcohol. Furthermore, the Ni 4 Co 1 /La(OH) x bimetallic catalyst demonstrates exceptional performance in the one-pot hydrogenation-hydrogenolysis of furfural to 1,5-pentanediol, exhibiting a low activation energy of 17.77 kJ/mol and a high turnover frequency of 192.1 h −1 . Notably, the Ni 4 Co 1 /La(OH) x bimetallic catalyst showcases remarkable stability. This outcome provides invaluable insights for the advancement of a sustainable process to produce diol monomers from renewable resources with a low carbon footprint.
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Journal of Water Process Engineering
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2024
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IF 6.3
Junjie Su,Qi Yang,Zhihu Zhang,Ziyue Zhang
Nowadays, Ni/Fe bimetallic nanocomposites have shown great potential for removing Cr(VI). However, the action of Ni 0 in Cr(VI) removal is still controversial, which was studied in this work. In this study, Ni/Fe@Fe 3 O 4 -g-C 3 N 4 (NFFOCN) nanocomposites were applied to remove Cr(VI) from aqueous solutions and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other methods. Batch experiments were conducted to evaluate the Cr(VI) removal performance. Experimental results demonstrated that under optimal operating conditions (pH 5.5, 10 mg/L Cr(VI), 0.3 g/L NFFOCN, 30°C), a Cr(VI) removal efficiency of 90.78% was achieved within 50 min. Theoretical maximum adsorption capacity was calculated to be 36.101 mg/g. Combining experimental and characterization results, it could be concluded that Cr(VI) removal was attributed to the synergistic effect of the NFFOCN components. Ni 0 not only participated directly in the reduction of Cr(VI) as an electron donor, but also converted the corrosion product H 2 of nano-zero-valent iron (nZVI) into highly reducible atomic hydrogen (·H) to remove Cr(VI). Additionally, Ni 0 could form a primary battery with nZVI, facilitating the electron transfer between nZVI and Cr(VI). NZVI and its derivatives, Fe 2+ ions and green rust, were responsible for Cr(VI) reduction. Furthermore, the presence of Fe 3 O 4 and carbon nitride (g-C 3 N 4 ) improved the stability and reactivity of the nanocomposites.
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Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Shuxin You,Shilong Xing,Chuanhai Jiang
The synergistic mechanism of microparticles and nanoparticles on optimizing microstructures homogeneity and enhancing microhardness and corrosion resistance of mixed coatings was deeply researched by co-electrodepositing CeO 2 microparticles and CeO 2 nanoparticles into nickel matrix. Microparticles contribute to enhancing the microhardness of the coating, while nanoparticles promote the homogeneity of the microstructure, thereby improving the corrosion resistance of the coating. Therefore, by co-electrodepositing microparticles and nanoparticles into the nickel matrix, microparticles and nanoparticles in the nickel matrix generate a synergistic optimization effect, combining the advantages of microparticles and nanoparticles. Microparticles are mainly responsible for enhancing the microhardness of the coating, while nanoparticles are responsible for promoting the homogeneity of the microstructure in the coating, maintaining a homogeneous distribution of microhardness, and improving the corrosion resistance of the coating. Ultimately, the mixed coating achieves both high microhardness and excellent corrosion resistance, along with homogeneous microhardness distribution.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Ziyang Xu,Liang Chen,Zeyu Liu,Jiaying Xing,Edward J. Anthony,Chunbo Wang
Methanol synthesis from CO 2 hydrogenation is a promising route for carbon–neutral fuel production, but conventional Cu-based catalysts suffer from poor activity at low pressure. Herein, we report a cost-effective and scalable dual-site Ni n /Cu 1 -A catalyst, designed by integrating Ni nanoparticles (NPs) with Cu single atoms (SAs), for CO 2 hydrogenation to methanol at ambient pressure. The obtained Ni n /Cu 1 -A catalyst achieves a remarkable methanol STY of 665.7 μmol g cat -1 h −1 at 240 °C and 0.1 MPa, significantly outperforming both monometallic Cu 1 -A (199.7 μmol g cat -1 h −1 ) and Ni n -A (38.4 μmol g cat -1 h −1 ) catalysts. Further investigations reveal that Ni NPs facilitate hydrogen activation and spillover, while Cu SAs serve as the primary active sites for CO 2 reduction to methanol, effectively promoting the formate-mediated reaction pathway. This synergistic interaction leads to a substantial enhancement in CO 2 -to-methanol conversion. This work develops an efficient catalyst for CO 2 hydrogenation under mild conditions and provides a promising strategy for distributed green methanol synthesis in small-scale systems, enabling sustainable CO 2 utilization through renewable energy integration.
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Surfaces and Interfaces
·
2024
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IF 5.7
Xuanqi Hao,Wenbin Shi,Ping Yang
To address the issues of low photoluminescence quantum yields (PLQYs), broad PL spectra, and poor stability, multicolor carbon dots (CDs) were synthesized by using different precursors. Blue-emitting CDs were created via a solvothermal synthesis by using citric acid and ethylenediamine while green-emitting CDs were fabricated using O-phenylenediamine. Ni doping further increased the PLQYs and stability of CDs. Ni-doped CDs (Ni-CDs) with blue- and green-emitting were synthesized through a one-step solvothermal method. The PL peak wavelengths of Ni-doped blue CDs (Ni-BCDs) and Ni-doped green CDs (Ni-GCDs) were located at 450 and 540 nm, respectively. After Ni-doping, the average particle size of green-emitting CDs was increased from 2.35 to 2.65 nm. Compared with undoped CDs, Ni-CDs exhibited narrow PL spectra, high PLQYs, and long fluorescent lifetime. The PLQYs of Ni-BCDs and Ni-GCDs were increased to 83.92 and 35.60 %, respectively. Interestingly, the PL peak wavelengths of Ni-doped CDs revealed a red-shift with increasing the solvent polarity (e.g. acetone, acetonitrile , N, N-dimethylformamide, tetrahydrofuran, dimethyl sulfoxide , ethanol, methanol, and H 2 O). In addition, the PL peaks of green-emitting Ni-CDs generated a large red-shift with increase the ratio of water in organic solvents compared with blue one. Namely, solid Ni-GCDs powders also revealed water dependent PL. After incorporating the CDs in flexible films, Ni-GCDs still revealed high brightness and stability. These results supplied important possibility for the application of multicolor CDs.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
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IF 7.7
Lingnan Kong,Quanhua Xie,Yuanyuan He,Shiyu Dong,Yang Liu,Wenliang Fan,Haiyan Yao,Mingfu Zhao,Nianbing Zhong
This paper proposes a polyvinyl alcohol/AlFFIVE-1-Ni (PVA/KAUST-8)-coated long-period fiber grating (LPFG) SO 2 concentration sensor to accurately monitor SO 2 concentrations online. To enhance the adhesion strength between the fiber and a SO 2 -sensitive film, the etched LPFG surface was silanized using 3-aminopropyltriethoxysilane, and then coated with a PVA/KAUST-8 SO 2 -sensitive sol using the doctor blading method. A fluorosilane hydrophobic coating was deposited on the SO 2 -sensitive membrane surface and integrated with a LPFG temperature sensor, thereby effectively eliminating measurement interference caused by ambient temperature and humidity fluctuations during SO 2 concentration detection. The morphology and composition of the SO 2 -sensitive films were characterized using optical microscopy, field-emission scanning electron microscopy, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. Furthermore, the working principle of the sensors for the detection of SO 2 was established. Under optimized parameters (LPFG diameter: 60 μm; PVA doping in PVA/KAUST-8: 12 wt%; SO 2 -sensitive film: 45 μm; fluorosilane composite layers: 12) within a humidity range of 0–60 % RH and a temperature range of 25–45 °C, the sensor demonstrated a good selective SO 2 detection with 2.79 pm/ppm sensitivity, 1.07 ppm detection limit, 390 s response time, and 8.89 % maximum relative error.
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