APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Shipei He,Sheng Fan,Kai Yuan,Shujia Guo,Sen Wang,Zhangfeng Qin,Mei Dong,Weibin Fan,Jianguo Wang
Herein, K + was added in the synthesis gel to regulate the distribution of acid sites in the ITQ-13 zeolite and enhance its catalytic performance in the conversion of methanol to olefins (MTO). The results indicate that a proper content of K + ions in the synthesis gel can not only expedite the crystallization of ITQ-13 zeolite, but also significantly decrease the proportion of paired Al and distribute more Al atoms in the 10-ring sinusoidal channel out from the intersection cavity. Accordingly, over the H-ITQ-13(0.3 K) zeolite prepared using the synthesis gel with a KCl/Al 2 O 3 molar ratio of 0.3, the alkene cycle of MTO keeping to the dual cycle hydrocarbon pool (HCP) mechanism is preferably enhanced, whereas the hydride transfer and aromatization reactions are substantially suppressed. As a result, H-ITQ-13(0.3 K) exhibits much longer catalytic lifetime and higher selectivity to propene and butene , in comparison with the H-ITQ-13 counterpart obtained without adding K + .
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yangqing He,Na Xu,Lucas Binnah Junior,Xing Hao,Binghua Yao,Qian Yang,Dongjie Liu,Zhanying Ma
Construction of semiconductor-assisted noble metal nanocomposites has been approved as an efficient strategy to achieve promising photocatalysts. In this paper, highly efficient AuNPs/h-BN nanocomposites have been fabricated by loading gold nanoparticles (AuNPs) as interfacial electron transfer mediators onto the hexagonal boron nitride nanosheets (h-BN). The SEM and HRTEM images, together with XPS analysis revealed that AuNPs were successfully deposited onto the surface of h-BN and the layered heterojunctions were generated between AuNPs and h-BN. The optimum 15%AuNPs/h-BN nanocomposites exhibit dramatically enhanced photocatalytic performance for degradation of levofloxacin hydrochloride with 84.4% removal rate, and hydrogen evolution of 61.15 μmol within 5 h. It is almost 4 and 61 times higher than that of pure h-BN, respectively. In addition, this is the first time using h-BN based material to evaluate the elimination efficiency of levofloxacin hydrochloride. The corresponding enhanced mechanism for 15%AuNPs/h-BN can be attributed to the effective interfacial electron-hole pairs separation and migration between h-BH and AuNPs and its surface Plasmon absorption (SPA). Moreover, the possible decomposition pathways for levofloxacin hydrochloride are proposed according to the UPLC-MS analysis. Herein, we have provided a good example for removing antibiotic residues by using h-BN-based metal nanocomposites towards environmental remediation.
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高影响因子
Science China-Chemistry
·
2022
·Vol. 66
·期 2
·548-561
·
IF 10.138
Zhao Ying-Han,Li Wenhao,Shen Tao,Zhao Yan,Liu Yunqi,Wang Yang
The development of readily accessible high-mobility n-type semiconducting polymers is in great demand for realizing high-performance p-n junction-based organic electronics. In this study, we demonstrate that with the combination of dual-acceptor strategy and C-H direct arylation polymerization (DArP), unipolar n-type semiconducting polymers can be conveniently synthesized. By tuning the monomer concentration, three dual-acceptor polymers, namely, poly(naphthalene diimide- alt -dithiophenyl pyrrolopyrrole-dione) (PNDI-DPP), poly(naphthalene diimide- alt -dithiophenyl isoindigo) (PNDI-IID), and poly (naphthalene diimide- alt -dithiophenyl bezothiadiazole) (PNDI-BT) can be obtained via C-H activation with decent number average molecular weight of ∼10 to 30 kg mol −1 and relatively narrow polydispersity index of ∼2. In addition, these polymers are defect-free in nature as evidenced by the nuclear magnetic resonance. Moreover, we attribute the different molar masses of the three copolymers under the same DArP condition to the different α-C-H acidity, which may stem from different electron-withdrawing capability of the hydrogenated acceptor units. Furthermore, the influence of the hydrogenated acceptor monomers on the optical, electrochemical and charge transporting properties is comprehensively studied. Among the three dual-acceptor polymers, PNDI-BT demonstrates the highest electron mobilities of up to 0.6 cm 2 V −1 s −1 in unipolar n-type organic transistors because of its relatively planar backbone, larger overlaps of the lowest unoccupied molecular orbital and strong H-aggregation. Note that the transistor performance of PNDI-BT synthesized via C-H activation in this study is at least comparable to the one made by conventional C(sp 2 )-C(sp 2 ) Stille or Suzuki cross-coupling polymerization. This study demonstrates the presented protocol can be a useful platform for sustainable and convenient synthesis of high-performance n-type semiconducting polymers.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 1
·647-657
·
IF 2.324
Xiao Tai,Huang Zu-Sheng,Wang Lingyun,Cao Derong
Three novel dithieno[3,2- f :2′,3′- h ]quinoxaline-based organic dyes ( IQ-C, IQ-D and IQ-F ) with three π-spacers were synthesized and developed for dye sensitized solar cells, where dithieno[3,2- f :2′,3′- h ]quinoxaline was used as electron-withdrawing π-spacers, and 2,3-diphenylquinoxaline or dibenzo[ a,c ]phenazine as auxiliary electron-withdrawing π-spacers. The dye IQ-D with 2,3-diphenylquinoxaline as auxiliary electron-withdrawing π-spacer exhibited higher photocurrent ( J sc ) and photovoltage ( V oc ) than that of the dye IQ-C with 2,3-bis(4-(octyloxy)phenyl)quinoxaline as the additional electron-withdrawing π-spacer, due to the larger adsorption amount of IQ-D . The dye IQ-F with a rigid conjugated dibenzo[ a,c ]phenazine as additional electron-withdrawing π-spacer showed the highest efficiency of 6.54% under AM 1.5 G irradiation. It was demonstrated that the π-spacers influence the photovoltaic performance of the dithieno[3,2- f :2′,3′- h ]quinoxaline-based organic dyes significantly. The results indicated that the dyes with three π-spacers are promising candidates for efficient dye-sensitized solar cells.
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JOURNAL OF FLUORESCENCE
·
2022
·Vol. 33
·期 1
·91-101
·
IF 2.525
Li Zhigang,Zhao Bing,Kan Wei,Bu Fanqiang,Qi Xin,Wang Liyan,Song Bo,Ding Limin
A reactive fluorescent “turn-on” probe ( di-PIP ) with imine-linked dual phenanthro[9,10- d ]imidazole luminophore have been conveniently prepared as an Al 3+ and H + dual functional receptor. di-PIP displayed high selectivity and sensitivity towards Al 3+ ion in DMF/HEPES accompanied by fluorescence blue-shift and a good linear relationship as well as a low detection limit of 30.5 nmol·L –1 , which can root from the synergetic functions of the decomposition reaction of di-PIP promoted by acidic Al 3+ and the coordination effect between decomposition product and Al 3+ . Intriguingly, it was found that hydrogen ion H + can be sufficient for simulating the fluorescence enhancing of di-PIP . 1 H NMR titration and MS analyses for elucidation of the intermediate structure further revealed that the acid-triggered decomposition reaction resulted in the rapid, and sensitive sensing to Al 3+ and H + . In addition, the probe di-PIP could be successfully applied to the detection of Al 3+ in real water samples, and also utilized to visualize Al 3+ and H + in the living cells.
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PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Jun-Feng Yang,Yun-Fei Liu,Lin-Lin Wei,Kai-Kai Qiao,Yan-Qiu Zhao,Lei Shi
The Minisci-type dehydrogenative coupling of N-heteroaromatic rings with inert C–H or Si–H partners via visible-light-catalyzed hydrogen atom transfer has been reported. This methodology allows the coupling reactions to be carried out in water as a solvent under air atmospheric conditions with visible-light illumination. A wide range of inert C–H and Si–H partners could be directly coupled with various N-aromatic heterocycles to deliver products in good to excellent yields.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Minghu Zhao,Jiuhu Zhao,Ran Ding,Rongshu Zhu,Haiyan Li,Zhi Li,Jingwen Zhang,Yongji Zhu,Huiying Li
The existence of sulfur dioxide and water vapor in the flue gas generated from waste-to-energy stations could lead to catalyst deactivation , which has adverse effects on NO x removal. It is thus particularly important to study the reaction mechanism of catalyst resistance to poisoning. Herein, we report the mechanism of In-Co 3 O 4 -Ga 2 O 3 /H-Beta catalyst to SO 2 and H 2 O resistance in the selective catalytic reduction (SCR) of NO x by CH 4 . The catalyst could achieve 74.6% NO x removal efficiency in the presence of 100 ppm SO 2 and 5% H 2 O. In this catalyst, Co 3 O 4 is attributed to enhancing the reversible poisoning of SO 2 and CH 4 activation and increasing the number of Brønsted acid sites by decomposing H 2 O. However, the InO + active center was still eroded by a small amount of water vapor, leading to a reduction in NO x removal efficiency. The addition of Ga 2 O 3 primarily provided an important intermediate NO 2 for CH 4 -SCR reaction and reduced the aggregates of Co 3 O 4 to increase the exposure of indium sites, and could reduce a part of SO 2 to S 2− . This study provides a good candidate for preparing catalysts with superior resistance towards SO 2 and H 2 O for CH 4 -SCR.
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高影响因子
RARE METALS
·
2025
·
IF 11
Zheng Hao-Yuan,Jin Chen,Che Hang,Lee Chia-Tse,Liu Guang,Wang Li,Zhao Yu-Yuan,Liu Hai-Zhen,Wang Xin-Hua,Yu Yi-Feng,Yan Mi
The Li–Mg–N–H (Mg(NH 2 ) 2 –2LiH) system, as a high-capacity Mg-based metal hydrogen storage material (5.6 wt%), has broad prospects for in vehicle hydrogen storage applications, but it still has high hydrogen ab/desorption barriers. To improve its hydrogen storage performance, a nanohydrogen storage alloy was innovatively combined with Mg(NH 2 ) 2 –2LiH, AB5 type nanohydrogen storage alloy LaNi 5 was prepared by co-precipitation method. Nano LaNi 5 and single-walled carbon nanotubes (SWCNTs) were co-doped into the Mg(NH 2 ) 2 –2LiH system at a ratio of 10 wt% and 2 wt%, significantly enhancing the hydrogen storage performance of Mg(NH 2 ) 2 –2LiH. The initial hydrogen ab/desorption temperatures of the co-doped system decreased from 110/130 °C to 45/85 °C. The release of by-product ammonia is significantly inhibited. 4.73 wt% H 2 can be ab/desorption in 150 min at 180/170 °C. Cycle tests show that the co-doped system can still maintain a hydrogen storage capacity of 4.75 wt% after ten hydrogen release cycles. Mechanism and density functional theory study have shown that during the hydrogen release process, partially hydrogenated LaNi 5 weakens the chemical bonding in Mg(NH 2 ) 2 , promoted the dissociation of hydrogen from the Mg(NH 2 ) 2 –2LiH system, while playing a dual role of "hydrogen overflow" and "hydrogen pump". SWCNTs act as auxiliary agents, helping to refine particle size and increase thermal conductivity. The synergistic effect of the two optimizes the comprehensive hydrogen storage performance of Mg(NH 2 ) 2 –2LiH. This study provides a new research method for improving the comprehensive hydrogen storage performance of Mg-based metal hydrogen storage materials using rare earth element catalysts. Graphical abstract
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产品关联
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高影响因子
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2024
·
IF 6.4
Junhui Fan,Dahai Zhu,Yifan Li,Changqing Liu,Huaqing Xie,Wei Yu
Thermal interface materials (TIMs) play a crucial role in addressing the heat dissipation challenges associated with high-power electrical equipment. Apart from possessing excellent thermal conductivity, and they must also exhibit low contact thermal resistance to facilitate efficient heat transfer at the interface. In this study, a novel composite with a dual-network structure was prepared by interfacial grafting to achieve superior thermal conductivity. The composite comprises polydimethylsiloxane (PDMS), functionalized boron nitride ( f -BN), and liquid metal (LM). This dual network structure effectively enhances phonon transportation and significantly improves the thermal transport performance of the composite. The thermal conductivity of the obtained composite can achieve 4.4 W/m·K, accompanied by a low contact thermal resistance of 0.32 °C·cm 2 /W. Furthermore, the dual network structure ensures the flexibility of the composite, as evidenced by the maximum elongation reaching 267.43% at a tensile strength of 0.35 MPa. This exceptional mechanical performance is expected to alleviate stress concentration issues arising from thermal expansion mismatch, thereby enhancing the practical applicability of the prepared TIMs. Overall, this study introduces a novel approach for fabricating flexible composites with high thermal conductivity and low contact thermal resistance, offering new insights into the preparation of TIMs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qihui Wang,Qianyuan Zhang,Chunli Li,Pinggui Tang,Yongjun Feng
Recycling precious metal active components and supports from spent catalysts is critical for resource utilization and environmental sustainability. Herein, we developed a hydroxyl/cyanide radicals oxidation strategy to achieve efficient recovery of Pd and Ag from spent acetylene hydrogenation catalysts while maximizing alumina support retention. Key parameters influencing Pd/Ag leaching efficiencies and support preservation were systematically investigated, and the underlying leaching mechanisms of the precious metals were elucidated. Under the synergistic action of multiple reactive species (•OH, •CN, O₂• − , and 1 O₂) from H₂O₂ and acetonitrile, Pd and Ag leaching efficiencies reached 100.00 % and 90.91 %, respectively. Kinetic analysis revealed that Pd and Ag leaching was dominated by chemical reaction control. Characterization of the recycled alumina (R-Al 2 O 3 ) confirmed that its crystal structure, surface acid-base properties, and elemental composition were largely preserved. Notably, R-Al 2 O 3 exhibited 96 % retention of crushing strength, 83.79 % retention of average pore size, and 88.24 % retention of total pore volume. This strategy not only enables effective precious metal recovery but also maintains the structural integrity of the carrier, providing a sustainable route for the industrial reuse of spent catalysts.
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高影响因子
Small Methods
·
2025
·Vol. 9
·期 12
·e01317
·
IF 9.1
De'en Guo,Yi Yang,Qingrui Cai,Bingchen He,Xingyu Gao,Heng Peng,Junhao Xue,Conghua Zhou
Carbon- electrode (CE) based, hole-conductor-free mesoscopic perovskite solar cells (meso-CPSCs) offer the merits of high stability and low cost, but they contain a large number of nanosized perovskite (PVSK) crystallites in the CE region. These crystallites contribute little to light absorption, but bring risks of charge recombination. Herein, a three-step holistic treatment is introduced to address this issue, such as treatment-1 (T1): partial CE peeling; treatment-2 (T2): octylammonium iodide modification; and treatment-3 (T3): coating of a secondary layer of CE. Low-temperature meso-CPSCs are chosen as the model platform to perform the strategy. It is observed that the strategy removes the redundant PVSK crystallites, induces the formation of tilt-stacked two-dimensional (2D) PVSK, and strengthens interfacial contact of PVSK/CE, which reduces the recombination risks and facilitates interfacial charge-extraction, and finally elevates the power conversion efficiency (PCE) of the low-temperature meso-CPSCs from 14.25(±0.69)% to 16.05(±0.40)%(optimized to 17.28%). The efficiency is further upgraded to 18.07% after additional optimization on internal resistance and substrate transparency. Such performance achieves an increment of ≈50% when comparing to the efficiency of ≈12% that was firstly reported in 2020. In more, the T 80 lifetime of ≈525 h has been obtained during the quasi-maximum power point tracking test in open air (device unsealed).
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PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2026
·
IF 7.1
Di Wang,Wenqi Wang,Bijun Zhao,Jiayun Liang,Lingzhu Song,Yixuan Chen,Wushuang Bai
A novel electrochemical–visual colorimetric AFB1 biosensing method was proposed. • The sensing method achieves spatial separation of AFB1 recognition and detection. • The electrochemical mode achieves low LOD of 4.2 × 10 −7 ng/mL and wide linear range. • The colorimetric modal achieves low LOD of 3.4 × 10 −7 ng/mL and wide linear range. • This work proposes a general dual-mode trace-level targets biosensing strategy. Aflatoxin B1 (AFB1) can be present in moldy grains, nuts, oil crops, and their processed by-products, posing a threat to food safety and human health. Therefore, sensitive and efficient detection of trace AFB1 is of great significance for early intervention in protection of food safety. In this research, an aptamer was used as the recognition agent for AFB1, a novel magnetically controlled electrochemical-visual colorimetric dual-mode AFB1 biosensing strategy was developed. H-shaped device consisting of a left cell and a right cell was designed, with the anodic aluminum oxide (AAO) membrane nanochannel in between. Under magnetic control, specific recognition of AFB1 by the aptamer in the left cell triggers DNA hybridization chain reaction (HCR) in the right cell, forming a glucose oxidase and peroxidase-like DNA G-quadruplex cascade catalytic structure, enabling the determination of AFB1 via glucose catalysis. This method incorporates dual signal amplification technology (HCR and enzyme cascade catalytic) and achieves spatial separation between AFB1 recognition and detection, thereby effectively reducing background interference and improving sensitivity. Using the electrochemical mode (Differential pulse voltammetry), the method achieved low limit of detection (LOD) of 4.2 × 10 −7 ng/mL, wide linear range of 10 −6 -10 2 ng/mL, excellent selectivity and anti-interference performance. Using the visual colorimetric mode, the LOD was as low as 3.4 × 10 −7 ng/mL and the linear range was 10 −6 -10 4 ng/mL. This work proposes a general dual-mode biosensing strategy and provides a promising approach for highly sensitive and efficient detection of trace-level targets in complex samples.
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