JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Fang Jia,Xu Xilong,Yang Yi,Han Zhiqiang,Zuo Zinong,Han Weiqiang,Lin Bin
Effective removal of soot deposited in diesel particulate filter by catalysts has attracted great attention in the aftertreatment field to achieve environment protection, but the problem is short by incomplete and poor soot combustion. Herein, an integrated ZnO–SnO 2 semiconductor n–n heterostructure strategy of catalysts and ash is proposed for promoting diesel soot combustion. The integrated effects of different catalysts and ZnO ash on soot oxidation are studied with thermogravimetric analysis and gas emission analysis. The diesel soot is simulated by Printex U (PU) particles, and the catalysts include SnO 2 , ZrO 2 , TiO 2 , CeO 2 and Pt/Al 2 O 3 nanoparticles. Compared with other catalysts, the best catalytic effect on soot oxidation is achieved when SnO 2 catalyst is mixed with PU/ZnO at 1:1:1 mass ratio in tight contact method. The S and R w indexes reach the largest values of 9.33 × 10 –8 % 2 min −2 ℃ −3 and 38.64 × 10 5 , and the CO 2 amount reaches the maximum value at 3462 ppm, which is correspondingly with the XRD and XPS spectrum results of PU/ZnO/SnO 2 with ZnO–SnO 2 heterojunction structure having more adsorbed oxygen. The excessive catalyst is negative to the heat and oxygen transfer among the nanoparticles. When the mass ratio of PU/ZnO/SnO 2 is 1:1:1, the soot combustion presents the comparatively superior state. The results of this study innovate the soot oxidation influenced by catalyst and ash, which benefits the optimization of passive regeneration strategy in DPF application.
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JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Lei Xu,Hao Sun,Xuefeng Tan,Dong Li,Gen-Qiang Chen,Xumu Zhang
A series of ferrocene-based chiral multidentate P,P,N,N-ligands were successfully designed and synthesized. They can be directly prepared via a one-step nucleophilic substitution reaction from (S)-1-[(R)-2-(diphenylphosphino)ferrocenyl] ethyl acetate [(SC,RFC)-BPPFOAc]. Their ruthenium complexes were used in the asymmetric hydrogenation of 2-pyridyl ketones under mild conditions, the target chiral 1-aryl- or 1-alkyl-(pyridine-2-yl)methanols were obtained with high yields and excellent enantioselectivities. The synthetic utility of this reaction was demonstrated through its utilization in the preparation of key intermediates for a RAS inhibitor and the antihistamine drug Carbinoxamine.
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CELL BIOCHEMISTRY AND FUNCTION
·
2016
·Vol. 34
·期 8
·588-596
·
IF 2.016
Yu Xiong,Hong-pei Ji,Wei-tao Song,Ye-Wei Yin,Chao-hua Xia,Bei Xu,Yi Xu,Xiao-bo Xia
Retinitis pigmentosa (RP) is a group of inherited neurodegenerative diseases characterized by the loss of photoreceptor cells through apoptosis. N -methyl- N -nitrosourea (MNU) is an alkylating toxicant that induces photoreceptor cell death resembling hereditary RP. This study aimed to investigate the role of nuclear factor κB (NF-κB) in MNU-induced photoreceptor degeneration. Adult rats received a single intraperitoneal injection of MNU (60 mg/kg bodyweight). Hematoxylin and eosin staining demonstrated progressive outer nuclear layer (ONL) loss after MNU treatment. Transmission electron microscopy revealed nuclear pyknosis, chromatin margination in the photoreceptors, increased secondary lysosomes, and lobulated retinal-pigmented epithelial cells in MNU-treated rats. Numerous photoreceptor cells in the ONL showed positive TUNEL staining and apoptosis rate peaked at 24 hours. Enhanced depth imaging spectral-domain optical coherence tomography showed ONL thinning and decreased choroid thickness. Electroretinograms showed decreased A wave amplitude that predominated in scotopic conditions. Western blot analysis showed that nuclear IκBα level increased, whereas nuclear NF-κB p65 decreased significantly in the retinas of MNU-treated rats. These findings indicate that MNU leads to selective photoreceptor degradation, and this is associated with the inhibition of NF-κB activation.
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ChemCatChem
·
2021
·Vol. 13
·期 19
·4159-4163
·
IF 5.686
Dongxia Jiao,Yehong Wang,Zhixin Zhang,Jian Zhang,Lijun Lei,Feng Wang
Graphical Synthetic methods : We designed a hydroxyapatite (HAP)-stabilized, positively charged Ru-based catalyst which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The combination of characterization results and control experiments showed that positively charged Ru species, particularly the hydrated RuO x particles on the surface were essential to the high catalytic activity of Ru-HAP in the formylation reaction. Formamide is an important solvent and synthetic intermediate. Herein, we designed a hydroxyapatite (HAP)-stabilized, positively charged Ru-based catalysts which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The Ru-HAP showed excellent catalytic performance in N,N-Dimethylformamide (DMF) synthesis, with about 75 % dimethylamine conversion and >99 % DMF selectivity at 300 h of continuous reaction. The combination of characterization results and control experiments showed that positively charged Ru species, including hydrated RuO x and Ru 3+ species, were catalytically active. In particular, the surface RuO x species were more active than the Ru 3+ species located within the HAP framework.
研究领域:
催化
·
材料科学
·
化学工程
·
无机化学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Danlian Huang,Hai Huang,Guangfu Wang,Ruijin Li,Ruihao Xiao,Li Du,Wei Zhou,Wenbo Xu
The coexistence of antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria (ARB) in the environment poses a potential threat to public health. In our study, we have developed a novel advanced oxidation process for simultaneously removing ARGs and ARB by two types of iron and nitrogen-doped biochar derived from rice straw (FeN-RBC) and sludge (FeN-SBC). All viable ARB (approximately 10 8 CFU mL −1 ) was inactivated in the FeN-RBC/ peroxymonosulfate (PMS) system within 40 min and did not regrow after 48 h even in real water samples. Flow cytometry identified 96.7 % of dead cells in the FeN-RBC/PMS system, which verified the complete inactivation of ARB. Thorough disinfection of ARB was associated with the disruption of cell membranes and intracellular enzymes related to the antioxidant system. Whereas live bacteria (approximately 200 CFU mL −1 ) remained after FeN-SBC/PMS treatment. Intracellular and extracellular ARGs ( tetA and tetB) were efficiently degraded in the FeN-RBC/PMS system. The production of active species, primarily •OH, SO 4 •- and Fe (IV), as well as electron transfer, were essential to the effective disinfection of FeN-RBC/PMS. In comparison with FeN-SBC, the better catalytic performance of FeN-RBC was mainly ascribed to its higher amount of pyridine-N and Fe 0 , and more reactive active sites (such as C O group and Fe-N sites). Density functional theory calculations indicated the greater adsorption energy and Bader charge, more stable Fe-O bond, more easily broken O O bond in FeN-RBC/PMS, which demonstrated the stronger electron transfer capacity between FeN-RBC and PMS. To encapsulate, our study provided an efficient and dependable method for the simultaneous elimination of ARGs and ARB in water.
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IEEE ELECTRON DEVICE LETTERS
·
2023
·Vol. 44
·期 7
·1152-1155
·
IF 4.9
Weishuai Duan,Zhe Liu,Xinfa Zhu,Biao He,Chao Fan,Yonghui Zhang,Mengjun Wang,Hongxing Zheng,Erping Li
Near-ultraviolet (NUV) detectors based on two-dimensional (2D) materials have garnered considerable attention owing to their atomic-scale thickness, varied bandgap, and strong interaction with incident light. In this work, homostructures composed of tin disulfide/chromium–doped tin disulfide (SnS
2
/Cr–SnS
2
) were proposed for 405 nm near-ultraviolet detectors. Afterward, superlative detectors were fabricated through the employment of micro-mechanical exfoliation and polydimethylsiloxane-assisted dry-transfer methods, anchored by the SnS
2
Cr–SnS
2
homostructures. The detectors demonstrated exceptional detection performance for 405 nm NUV radiation with a significant responsivity of
$2.04\times 10^{{3}}\,\,\text {A}\cdot \text {W}^{-{1}}$
and a short response time of 8 ms, exceeding that of detectors based on most 2D materials and even commercial light detectors (Thorlabs FD11A–Si). The work presents an effective homostructure for high-performance SnS
2
-based detectors, thereby opening an opportunity for the utilization of SnS
2
in NUV detectors.
研究领域:
材料科学
·
光电子学
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 30
·17378-17391
·
IF 4.6
Wang Ying,Ma Yuyang,Cai Yimin,Yuan Lihua,Feng Wen,Cui Shuxun
N,O-Hybrid ligands featuring N-heterocyclic backbones
are promising
extractants for lanthanide separation, yet the governing role of N-donor
basicity in their complexation and extraction behavior toward trivalent
lanthanides remains less understood. This work investigates the effect
of N-donor basicity of two bipyridine- and bipyrimidine-based tetradentate
diamides, i.e., Et-Tol-BPDA and Et-Tol-BPymDA, on the coordination
and extraction of lanthanides. Results from solvent extraction experiments
indicate that both ligands extract light lanthanides via a cation-exchange
mechanism, while Et-Tol-BPymDA exhibits markedly higher selectivity
and efficiency with 1–6 M HNO 3 , achieving a La/Sm
separation factor of 90 at 3 M HNO 3 . The superior extraction
performance of Et-Tol-BPymDA over Et-Tol-BPDA stems from its enhanced
protonation resistance under acidic conditions, where the electron-withdrawing
effect of the extra bipyrimidine nitrogen atoms lowers the N-donor
basicity, allowing the ligand to retain its metal-binding capacity
even in highly acidic media, as validated by combined spectroscopic,
crystallographic, and theoretical analyses. The bonding analysis of
crystallographic and optimized complex structures confirms that amide
oxygen atoms serve as the primary coordination sites and produce shorter
metal–ligand bonds and stronger coordination interactions for
Et-Tol-BPDA. These findings unravel how the subtle variations in the
basicity of N-heterocycle modulate the coordination and extraction
properties of N,O-hybrid ligands toward trivalent lanthanides.
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Surfaces and Interfaces
·
2026
·
IF 6
Shiyang Fu,Yuqing Shi,Guowei Yu,Xiao Liang,Nan Gao,Jing Zhang
Co 3 O 4 /Fe 2 O 3 p–n heterojunctions were prepared hydrothermally. • CF-5 shows a 5.6-fold response at a lower optimal temperature. • DFT reveals charge redistribution enhancing n-butanol adsorption. To selectively detect volatile organic compounds at low operating temperatures are highly desirable for industrial safety and environmental monitoring. Herein, we report the high-performance n-butanol gas sensors via interfacial engineering of Co 3 O 4 /Fe 2 O 3 p–n heterojunction composites. Hierarchical architectures composed of Fe 2 O 3 nanoparticles uniformly anchored on Co 3 O 4 nanorods were synthesized through a facile hydrothermal calcination strategy. Among the prepared samples, the optimized composite delivers a markedly enhanced sensing response of 23.08 toward 100 ppm n-butanol, representing a 5.6-fold improvement compared with pristine Co 3 O 4 , and simultaneously reducing the optimal operating temperature to 110°C. The mechanism analyses reveal pronounced interfacial charge transfer from Fe 2 O 3 to Co 3 O 4 , which induces band bending and built-in potential barriers that sensitively regulate carrier transport. The formation of heterointerfaces also significantly enriches chemisorbed oxygen species, thereby accelerating surface oxidation reactions with n-butanol molecules. As a result, the sensor exhibits outstanding selectivity against common interfering gases, fast response/recovery dynamics (42/36 s). Density functional theory calculations further elucidate that the heterojunction facilitates stronger adsorption of n-butanol and its oxidation intermediates, enhanced charge transfer, and favorable electronic-state redistribution near the Fermi level. This work highlights interfacial electronic engineering as an effective strategy for developing energy-efficient and highly reliable metal-oxide gas sensors. Download: Download high-res image (237KB) Download: Download full-size image
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HYDROMETALLURGY
·
2026
·
IF 6.3
Zehui Dong,Runhan Yan,Jinsong Shi,Nanfu Yan,Yaqing Weng,Guisheng Zeng,Hongmin Cui
Novel N,N-dialkylamide carboxylic acids extractants (DOOBA and DOMOPA) were prepared. • The Al(III) impurity was effectively removed from Gd(III) by DOOBA and DOMOPA. • The stability and recycling performance of DOOBA and DOMOPA were proved well. • A high purity Gd 2 O 3 (99.97%) was obtained after a three-stage extraction with DOOBA. The separation of rare earths (REs) and aluminum (Al) is a critical challenging step in REs metallurgy due to their similar chemical properties. This study developed two novel N,N-dialkylamide carboxylic acid extractants-(4-(dioctylamino)-4-oxobutanoic acid (DOOBA), 5-(dioctylamino)-3-methyl-5-oxopentanoic acid (DOMOPA), to separate Al(III) from GdCl 3 solution. Using n-heptane as the diluent, the extraction performances of the DOOBA and DOMOPA systems for separation of Al(III) and Gd(III) were systemically investigated. The results indicated that DOOBA and DOMOPA exhibited effective extraction for Al(III) and low competitive behavior with Gd(III). A further understanding on the thermodynamics extraction mechanism of DOOBA and DOMOPA for Al(III) was discussed. Stripping and recycling performance of the DOOBA and DOMOPA systems were proved well. A three-stage counter-current extraction simulation was carried out to remove Al(III) from industrial GdCl 3 feed. The simulated solutions were employed in this study to elucidate fundamental separation behavior; the research ultimately targets the removal of aluminum impurities from industrial GdCl₃ feeds, which commonly contain impurities such as Al, Fe, and other metal ions. Gd(III) was purified and recovered by oxalic acid precipitation and a subsequent calcination step. Gd 2 O 3 with a purity of 99.97% was obtained. This work provides a new strategy for selective removal of aluminum from GdCl 3 solution to obtain high-purity gadolinium. Download: Download high-res image (119KB) Download: Download full-size image
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2026
·
IF 2.5
Kaijian Li,Yuqi Su,Maogang He,Ying Zhang
Reliable diffusion data for alcohol–alkane mixtures are still limited, particularly for systems exhibiting strong non-ideal behavior. In this work, mutual diffusion coefficients for ethanol + n-hexane and n-butanol + n-hexane were measured over the entire composition range at 298.15–308.15 K using digital holographic interferometry. The relative standard uncertainty associated with the optical measurement subsystem was estimated to be 0.0118. After propagation of the identified instrumental uncertainty sources, including temperature control, phase-parameter determination, composition preparation, and material purity, the instrumental relative standard uncertainty of the diffusion coefficients was evaluated to be 0.0121, corresponding to an expanded uncertainty of approximately 2.42% (k = 2). Considering the additional variability among independent experimental realizations, the overall expanded relative uncertainty was estimated to be approximately 4.8% (k = 2). For both systems, the mutual diffusion coefficient shows a pronounced U-shaped dependence on composition, with a minimum at intermediate alcohol mass fractions. In the limit of ω 1 → 0, the mutual diffusion coefficient approaches the tracer diffusion coefficient of alcohol in n-hexane, corresponding to diffusion under infinite dilution conditions. The observed behavior reflects strong non-ideal interactions, primarily associated with hydrogen bonding and composition-dependent molecular interactions. Compared with ethanol, the n-butanol + n-hexane system exhibits stronger non-ideality, consistent with the longer alkyl chain of n-butanol. The experimental data were evaluated using the Darken, Vignes, and UNIDIF models. Among them, the UNIDIF model provided the best overall agreement, although deviations remain significant over the full composition range. For ethanol + n-hexane at 298.15 K, the present results show good agreement with available literature data in terms of the overall composition-dependent trend, supporting the reliability of the measurement methodology. The new diffusion data reported here extend the available database for alcohol–alkane systems and provide a consistent basis for improving transport modeling.
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Polymer Chemistry
·
2026
·
IF 3.9
Kun Liu,Xupeng Han,Jiahao Zhou,Yao Long,Min Zhang,Yayan Wang,Jiaping Tan,Meilin Liu,Lijun Li,Yali Li
The synthesis of well-defined, functionalized polystyrene with controlled molecular weight and narrow molecular weight distribution by anionic polymerization under mild conditions poses certain challenges. In this study, a novel functionalized monomer, vinylbenzyl N,N-allylmethylamine (VBAMA, ortho/meta/para=7/23/70), carrying both tertiary amine functional groups and crosslinkable vinyl pendant groups was designed and synthesized via the substitution reaction between chloromethyl styrene (VBC) and allyl methylamine. Furthermore, a series of bifunctionalized polystyrene products were prepared through in-situ anionic copolymerization with styrene with n BuLi as initiator in cyclohexane at 303K. The kinetics of the binary copolymerization process and the comonomer sequence distribution of the copolymer were analyzed in depth. The copolymer products were comprehensively characterized by FTIR, 1 HNMR, GPC and DSC for both qualitative and quantitative analysis. By using the classical F-R and K-T methods to calculate the binary reactivity ratios (rVBAMA = 1.54-1.59 and rST = 0.28-0.32), the reactivity ratios data indicated that VBAMA has a higher anionic reactivity and tends to form a random copolymer sequence with styrene. This research provides a simple and effective synthetic route for the preparation of controllably crosslinkable, amine-difunctionalized polystyrene.
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Nature Communications
·
2026
·
IF 18.1
Zhai Mengde,Wu Tianhao,Du Kaihuai,Chen Cheng,Shibayama Naoyuki,Narmandakh Khongorzul,Khan Abdul Haseeb Hassan,Wang Ying-Chiao,Shang Juan,Staykov Aleksandar,Song Jun Tae,Ida Shintaro,Wang Pangpang,Yamada Sunao,Tamada Kaoru,Zhao Shuai,Wang Aili,Guo Zhanglin,Matsushima Toshinori,Miyasaka Tsutomu,Cheng Ming
Self-assembled molecules are widely used as bottom interfacial layers in inverted perovskite solar cells, yet their application to perovskite top surfaces remains poorly understood. Here, we develop two self-assembled molecules for perovskite surface modification and interfacial optimization with the hole transport layer. Through solvent engineering, ordered and uniform molecular packing is achieved on the perovskite surface. These molecules optimize surface energetics and promote efficient hole transfer when coupled with a homologous hole transport layer. Their large molecular dipoles tune interfacial energy alignment and reduce energetic offsets, thereby accelerating charge extraction from the perovskite layer. This dipole-driven interfacial modulation is effective in both normal and inverted device architectures. As a result, a power conversion efficiency of 26.18% (certified 26.23%) is achieved in normal-structure devices, together with improved operational stability under maximum power point tracking. This work establishes a viable strategy for perovskite surface engineering using self-assembled molecules.
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