Journal of the American Chemical Society
·
2020
·
IF 14.612
Xianju Zhang,Xianxin Wu,Xiaoyu Liu,Gaoyu Chen,Yongkai Wang,Jianchun Bao,Xiangxing Xu,Xinfeng Liu,Qi Zhang,Kehan Yu,Wei Wei,Jingjing Liu,Jun Xu,Hua Jiang,Peng Wang,Xun Wang
Perovskite and chalcogenide quantum dots (QDs) are important nano semiconductors. It has been a challenge to synthesize heterostructural QDs combining perovskite and chalcogenide with tailorable photoelectronic properties. In this report, heterostructural CsPbX3-PbS (X = Cl, Br, I) QDs were successfully synthesized via a room temperature in situ transformation route. The CsPbX3-PbS QDs show a tunable dual emission feature with the visible and near-infrared (NIR) photoluminescence (PL) corresponding to CsPbX3 and PbS, respectively. Typically, the formation and evolution of the heterostructural CsPbBr3–PbS QDs with reaction time was investigated. Femtosecond transient absorption spectroscopy (TAS) was applied to illuminate the exciton dynamics in CsPbBr3–PbS QDs. The mild synthetic method and TAS proved perovskite to PbS energy transfer may pave the way toward highly efficient QD photovoltaic and optoelectronic devices.
研究领域:
材料科学
·
光电子学
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高影响因子
Crystals
·
2026
·Vol. 16
·期 6
·368
·
IF 2.9
Xiaolu Mao,Changsheng Yin,Yang Cao,Xiaodong Shen,Wenbo Xin
Carbon nanotubes (CNT) are among the strongest candidates for electromagnetic interference (EMI) shielding materials because of their excellent performance. However, when assembled into macroscale materials, their conductivity is usually limited to 104S/m, restricting further application as shielding materials. Here, we prepared a carbon nanotube composite film (Au/Cl-CNT) with high conductivity and excellent EMI properties. Characterizations confirm that Au exists in the form of uniform Au plates and particles anchored on the CNT surface, while Cl is doped into the CNT framework as halogen dopants. The optimized Au/Cl-CNT film delivers an ultra-high electrical conductivity of 3.39 × 105S/m, which is approximately 23 times higher than that of the pristine CNT film. The excellent electrical properties of the Au/Cl-CNT films endow them with excellent EMI shielding effectiveness (SE). Au/Cl-CNT films with a thickness of ~10.5 μm achieve an EMI SE of up to 67 dB across both the X-band and Ku-band. The superior EMI SE mainly results from the combined effect of various mechanisms, namely reflection inside and outside the material, as well as absorption inside the material. This work clarifies the synergistic enhancement mechanism of Au and Cl on CNT conductivity and EMI shielding, offering new insights into halogen-modified shielding materials.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Cong Niu,Qingsong Zhang,Yulian Zhang,Qianqian Huang,Jinbao Chen,Xin Wang
Lead halide perovskite single crystals have demonstrated significant potential for X-ray and gamma-ray detection. While these high-energy photons generate charge carriers within the crystal, they also induce irradiation damage, a phenomenon that has not been extensively studied in these materials. In this work, we investigate the structural and charge transport properties of MAPbBr 2.5 Cl 0.5 perovskite single crystals under 50 kV X-ray irradiation. Transmission electron microscopy reveals that irradiation induces lattice defects. Furthermore, analyses via the space-charge-limited current and time-of-flight methods confirm that these defects increase trap density and reduce charge carrier mobility. The degradation of charge transport properties is also found to be strongly dependent on both the crystal orientation and the direction of the incident radiation. This study provides critical insights into the irradiation damage mechanisms in lead halide perovskite single crystals.
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高影响因子
PETROLEUM CHEMISTRY
·
2026
·Vol. 66
·期 1
·49-56
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IF 1.1
Yu Hongyin,Zhao Rongxiang,Li Xiuping,Hou Liangpei
A deep eutectic solvents (DES) was synthesized by stirring mixture of 1-butyl-pyridinehydrochloride ([C 4 pyr]Cl) and oxalic acid (C 2 H 2 O 4 ) at 100°C. The [C 4 pyr]Cl/C 2 H 2 O 4 DES was characterized by FT-IR and 1 H NMR spectroscopy. This DES is capable of extracting thiophene-type sulfides due to the similar polarity of 1-butyl-pyridine and DBT. The –COOH groups within the [C 4 pyr]Cl/C 2 H 2 O 4 DES are readily oxidized to ‒COOOH by H 2 O 2 , which susequently catalyzes the thiophene oxidation into sulfone in the model oil. The higher polarity of sulfone compared to that of thiophone enhances their solubility in the solvent. When the V(DES)/V(model oil) = 0.2, T = 50°C, and O/S = 6, the DBT removal rate reached 98.6% within 80 min. The catalytic activity of [C 4 pyr]Cl/C 2 H 2 O 4 exhibited only a slight decrease after nine regeneration cycles. The apparent activation energy for DBT removal using [C 4 pyr]Cl/C 2 H 2 O 4 was 33.3 kJ/mol. Experimental results indicate that the low apparent activation energy contributes to the high desulfurization efficiency.
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高影响因子
Journal of Material Cycles and Waste Management
·
2023
·Vol. 25
·期 4
·2326-2337
·
IF 3.1
Dou Guolan,Zhang Liying
In the present work, mango pit was used to study the feasibility of converting ionic liquid-pretreated biomass into biofuel and activated biochar by using pyrolysis temperature as a key variable. Ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) was used as a green solvent to dissolve mango pit. The impact of [Bmim]Cl on the pyrolysis properties at peak DTG temperature was investigated. Pretreatment with [Bmim]Cl was observed to slightly enhance biochar yield, while somewhat decreasing bio-oil and biogas yields. The yield of hydrogen and methane, as well as the generation of phenolic and alcoholic bio-oils, are increased by [Bmim]Cl pretreatment. [Bmim]Cl pretreatment was determined to promote the formation of pore structure, a greater number of pores were opened, and the BET surface areas increased 24 times. The pyrolysis kinetics were calculated using the DAEM model. The results showed that [Bmim]Cl pretreatment resulted in lower activation energy and a high amount of fraction mass conversion at low temperatures. As a result, the results showed that pyrolysis of [Bmim]Cl-pretreated biomass did not require high temperatures, and that it is possible to convert ionic liquid pretreatment biomass into high-quality biofuel and active biochar by controlling the pyrolysis temperature. Graphical abstract
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Yuwen Sun,Baogui Zheng,Xiaowen Wu,Lianyi Wang,Jiacheng Jiang,Hao Ding,Xin Min,Zhaohui Huang,Minghao Fang,Ruiying Luo
Graphitized carbonitride (g-C3N4) is widely used in CO2 reduction, hydrogen production, and degradation of toxic chemical dyes and antibiotics. It is a kind of photocatalytic material with excellent performance, and it has the advantages of being safe and nontoxic, having a suitable band gap (2.7 eV), and having a simple preparation and high stability, but because of its fast optical recombination speed and low visible light overutilization, the multifunctional application of g-C3N4 is seriously hindered. Compared with pure g-C3N4, MWCNTs/g-C3N4 have a red-shift in the visible range and a strong absorption in the visible region. Melamine and carboxylated multiwalled carbon nanotubes were used as raw materials to successfully prepare CMWCNT modified g-C3N4 doped with P, Cl by a high temperature calcination method. The effect of the addition amount of P, Cl on the photocatalytic performance of modified g-C3N4 was studied. The experimental results show that the multiwalled carbon nanotubes can accelerate the electron migration, and the doping of P, Cl elements can change the energy band structure of g-C3N4 and reduce the band gap. Through fluorescence analysis and photocurrent analysis, it is known that the incorporation of P, Cl reduces the recombination efficiency of photogenerated electron–hole pairs. In order to explore the application in the degradation of chemical dyes, the photocatalytic degradation efficiency of RhB under visible light was studied. The photocatalytic performance of the samples was evaluated by photodecomposition of aquatic hydrogen. The results showed that when the amount of ammonium dihydrogen phosphate was 10 wt %, the photocatalytic degradation efficiency was the highest, which was 21.13 times higher than that of g-C3N4.
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PubMed
高影响因子
Communications Biology
·
2023
·Vol. 6
·期 1
·1-13
·
IF 5.9
Sun Weijia,Li Yuheng,Li Jianwei,Tan Yingjun,Yuan Xinxin,Meng Haoye,Ye Jianting,Zhong Guohui,Jin XiaoYan,Liu Zizhong,Du Ruikai,Xing Wenjuan,Zhao Dingsheng,Song Jinping,Li Youyou,Pan Junjie,Zhao Yunzhang,Li Qi,Wang Aiyuan,Ling Shukuan,Dai Rongji,Li Yingxian
Mechanical force loading is essential for maintaining bone homeostasis, and unloading exposure can lead to bone loss. Osteoclasts are the only bone resorbing cells and play a crucial role in bone remodeling. The molecular mechanisms underlying mechanical stimulation-induced changes in osteoclast function remain to be fully elucidated. Our previous research found Ca 2+ -activated Cl − channel Anoctamin 1 (Ano1) was an essential regulator for osteoclast function. Here, we report that Ano1 mediates osteoclast responses to mechanical stimulation. In vitro, osteoclast activities are obviously affected by mechanical stress, which is accompanied by the changes of Ano1 levels, intracellular Cl − concentration and Ca 2+ downstream signaling. Ano1 knockout or calcium binding mutants blunts the response of osteoclast to mechanical stimulation. In vivo, Ano1 knockout in osteoclast blunts loading induced osteoclast inhibition and unloading induced bone loss and. These results demonstrate that Ano1 plays an important role in mechanical stimulation induced osteoclast activity changes.
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PubMed
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2023
·Vol. 48
·期 4
·e202200154
·
IF 1.8
Chengcheng Zeng,Zongwei Yang,Jiahui Liu,Ling Ding,Shilong Hao,Feiyan Gong,Zhijian Yang
Low melting point compound MTNP was usually adopt to form co-crystal explosive with CL-20 to reduce sensitivity, and the co-crystal may have the potential of green engineering application. Improving mechanical properties of co-crystals explosive is one of the effective ways to broaden its practical application. In this work, CL-20/MTNP energetic co-crystal was selected to be coated by polydopamine (PDA) and neutral bonding agent (NBA), with enhanced mechanical properties and developed interfacial strength between crystal and binder. The TG-DSC curve showed that thermal decomposition of co-crystal explosives divided into two steps, and the melting point delayed to 210 °C compared with that of MTNP. After surface modification, the storage modulus of PBX was increased by more than 20 % at the temperature range of (25–120) °C, and creep strain was also effectively reduced. The Brazilian and compressive strength of PDA coating samples increased by 69.89 % and 210.53 % respectively, as well as improved elongation, leading to increased fracture toughness. Here, the highlighted modification on the surface of CL-20/MTNP co-crystal can be used as a reference insight to improve the mechanical properties of new explosives.
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高影响因子
JOURNAL OF INFECTION
·
2022
·
IF 38.637
Zhuo-Er Qiu,Lei Chen,Xiao-Chun Hou,Jie Sheng,Jian-Bang Xu,Jia-Wen Xu,Dong-Dong Gao,Ze-Xin Huang,Tian-Lun Lei,Zi-Yang Huang,Lei Peng,Hai-Long Yang,Qin-Hua Lin,Yun-Xin Zhu,Wei-Jie Guan,Zhao-Rong Lun,Wen-Liang Zhou,Yi-Lin Zhang
Summary Toxoplasma gondii is a widespread parasitic protozoan causing toxoplasmosis including pulmonary toxoplasmosis. As the first line of host defense, airway epithelial cells play critical roles in orchestrating pulmonary innate immunity. However, the mechanism underlying the airway inflammation induced by the T. gondii infection remains largely unclear. This study demonstrated that after infection with T. gondii , the major anion channel located in the apical membranes of airway epithelial cells, cystic fibrosis transmembrane conductance regulator (CFTR), was degraded by the parasite-secreted cysteine proteases. The intracellular Cl − concentration ([Cl − ] i ) was consequently elevated, leading to activation of nuclear factor-κB (NF-κB) signaling via serum/glucocorticoid regulated kinase 1. Furthermore, the heightened [Cl − ] i and activated NF-κB signaling could be sustained in a positive feedback regulatory manner resulting from decreased intracellular cAMP level through NF-κB-mediated up-regulation of phosphodiesterase 4. Conversely, the sulfur-containing compound allicin conferred anti-inflammatory effects on pulmonary toxoplasmosis by decreasing [Cl − ] i via activation of CFTR. These results suggest that the intracellular Cl − dynamically modulated by T. gondii mediates sustained airway inflammation, which provides a potential therapeutic target against pulmonary toxoplasmosis.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Huishuang Jiang,Yang Qu,Xianfa Zhang,Rui Gao,Xiaoli Cheng,Shan Gao,Lihua Huo,Zolt́an Major,Yingming Xu
As a poisonous and harmful gas, NO 2 , is not only harmful to the environment, but also detrimental to human health. In this work, ionic liquids (1-hexadecyl-3-methylimidazolium chloride [C 16 Mim] Cl) were selected as dopants to prepare flower-like Cl uniform doped In 2 O 3 nanomaterials. The material exhibits excellent sensing performance to NO 2 under UV light because of Cl uniform doped. Compared with the experiment in dark conditions, the response value of the sensor to 5 ppm NO 2 under UV light is approximately two times higher (S = 425.9) and presents a faster recovery rate (69 s). Chlorine doping shifts the valence band of the material upwards, facilitating the photogenerated electron leap under UV illumination. Moreover, the in-situ DRIFT under UV light were employed to verify the interaction between the materials and NO 2 gas in N 2 , air and O 2 atmospheres respectively. It was found that the presence of oxygen in the environment affects the adsorption of NO 2 on the surface of the Cl doped In 2 O 3 material. This work is of great significance to the sensing mechanism investigation of photo-activated NO 2 gas sensors.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xing Yang,Jun Guo,Zi-Yuan Wang,Wen-Hao Gu,Quan Shan,Jing Feng,Zhen-Hua Ge
Bi 2 S 3 -based materials with low thermal conductivity and high Seebeck coefficient has been regarded as promising thermoelectric materials for years. To optimize the thermoelectric properties of Bi 2 S 3 materials, (Se, Cl)-co-doped nanostructured Bi 2 S 3 bulks were prepared by hydrothermal method combined with spark plasma sintering . The doping contents of Se and Cl in Bi 2 S 3 depend on the reaction time of the hydrothermal process. A high power factor of 450 μWm −1 K −2 was achieved for Bi 2 S 3 sample with the reaction time of 24 h owing to the substitution of S by Se and Cl. Meanwhile, a low thermal conductivity of 0.35 Wm −1 K −1 is obtained for the Bi 2 S 3 sample with the reaction time of 18 h, owing to the strong phonon scattering caused by the high density of grain boundaries, pores and point defect . Therefore, benefiting from the improved electrical transport properties and reduced thermal conductivity, a peak ZT value of ~ 0.57 was obtained at 673 K for the Bi 2 S 3 sample with the reaction time of 24 h.
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高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Shuoshuo Zang,Guoqing Xu,Renci Yang,Qinyi Zhu,Hewen Liu
It is still challenging to achieve both good stability and high PLQYs for perovskite NCs because of their ionic nature and structural defects. In this work, tungstosilicic acid (TSA) is used for the surface passivation of cesium lead halide perovskite NCs. Near-unity PLQY is achieved for CsPbBr3 NCs after surface passivation with a suitable amount of TSA. XRD in conjunction with XPS analysis shows that TSA binds hydrophobic chains of OAm onto the surface of CsPbBr3 NCs. XPS results also demonstrate that TSA passivation can change the charge distribution of the cations on the surface layers, which can enhance the interaction with surface traps. PL decay analysis reveals that trap states arising from the surface defects are significantly decreased after TSA passivation. TSA-passivated CsPbBr3 NCs demonstrate long-term ambient stability and good resistances to polar solvents and maintain about 80% of their initial PL intensity after storage under ambient conditions for 50 days. It is further found that TSA passivation is able to improve the PLQYs of a broad spectrum of CsPbX3 (X = Cl, Br, I) NCs without hindering the tunability of the band gaps and PL colors of CsPbX3 NCs via anion exchange.
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