JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Lei Meng,Bin Yao,Yongfeng Li,Zhanhui Ding,Zhenyu Xiao,Kaisi Liu,Gang Wang
The back contact adhesion is the important factor of the microstructural performance which can determine the optoelectronic properties of the kesterite-based solar cells. Here, we present a rational and effective strategy to significantly enhance the back contact adhesion of Cu 2 (Zn,Cd)Sn(S,Se) 4 (CZCTSSe) absorber layers by insetting the appropriate thickness carbon-doping CZCTS thin films . We chose the oleylamine as the carbon-doping reagent which can generate a small amount of carbon in the annealing process . The suitable thickness carbon-doping CZCTS films can significantly change the crystal growth mechanism of CZCTSSe absorber layers, and eliminate the holes in the back contact. The efficiency of CZCTSSe solar cells fabricated by insetting the appropriate thickness carbon-doping CZCTS films is above 7%, and shows the excellent repeatability and long-term air stability compared with the control devices.
研究领域:
材料科学
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光伏技术
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半导体物理
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表面与界面工程
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无机功能材料
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yujie Fan,Jun Xu,Jing Liu,Luping Feng,Fangrong Zhou,Haoran Li,Jianghong Wang,Enjun Chen,Lixiang Zhang,Hua Wang
S-scheme In 2 O 3 /g-C 3 N 4 heterostructure was prepared for tetracycline hydrochloride (TCH) degradation through in-situ growth of In 2 O 3 nanorods (NRs) onto g-C 3 N 4 nanosheets (NSs) via high-temperature thermal polymerization method. The results show that resulted heterostructure could exhibit varying photocatalytic behaviors under simulated sunlight depending on In 2 O 3 loading ratios. The one with loading ratio of In 2 O 3 to g-C 3 N 4 at 10 wt% could display the best photocatalytic performance with efficiency up to 93.4% within 60 min, which are 2.61-fold and 1.17-fold higher than In 2 O 3 and g-C 3 N 4 . Herein, In 2 O 3 and g-C 3 N 4 components with matched band structures could individually serve as holes quencher and electrons donor to prolong carrier lifetime through in-situ formed interfacial electrostatic field due to their different Fermi levels. An S-scheme heterostructure could thus be engineered to facilitate charge carrier migration while enhancing redox capabilities, ultimately yielding superior photocatalytic performance. Moreover, the developed heterostructure could present superior structure and activity stability. Crucially, it was noticed that • O 2 – and • OH radicals played a major role in TCH degradation and the possible degradation and mineralization pathways as well as toxicity of by-products were explored based on identified intermediate products. These findings underscore that In 2 O 3 /g-C 3 N 4 heterostructure could hold substantial potential for practical environmental remediation applications.
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MOLECULES
·
2023
·Vol. 28
·期 5
·2221
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IF 4.6
Lingxue Meng,Yige Wang,Wenwei Liu,Chunlei Fan,Haoxiong Nan,Jiang Wang,Jia Yu
Playing a significant role in electrochemical energy conversion and storage systems, heteroatom-doped transition metal oxides are key materials for oxygen-involving reactions. Herein, mesoporous surface-sulfurized Fe–Co3O4nanosheets integrated with N/S co-doped graphene (Fe–Co3O4–S/NSG) were designed as composite bifunctional electrocatalysts for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR). Compared with the Co3O4–S/NSG catalyst, it exhibited superior activity in the alkaline electrolytes by delivering an OER overpotential of 289 mV at 10 mA cm−2and an ORR half-wave potential of 0.77 V vs. RHE. Additionally, Fe–Co3O4–S/NSG kept stable at 4.2 mA cm−2for 12 h without significant attenuation to render robust durability. This work not only demonstrates the satisfactory effect of the transition-metal cationic modification represented by iron doping on the electrocatalytic performance of Co3O4, but it also provides a new insight on the design of OER/ORR bifunctional electrocatalysts for efficient energy conversion.Keywords:iron-cobalt bimetallic oxides;surface vulcanisation;N/S co-doped graphene;oxygen evolution reaction;oxygen reduction reaction;bifunctional electrocatalyst
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Analytical Methods
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2023
·Vol. 15
·期 7
·884-895
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IF 3.1
Xin Wang,Xiaoqi Sun,Yueying Jin,Shengyu Cheng,Yu Han,Minghui Zhang,Lingli Zhang,Xi-Ling Li,Chun-Yan Xu,Jun Zhe Min
This study reports a novel fluorescent chiral derivatization reagent, 4-(N,N-dmethylaminosulfonyl)-2,1,3-benzoxadiazole-(2-succinimidoxy)-trans-2-methyl-L-proline (DBD-S-M-Pro), with a benzoxadiazole structure containing an N-hydroxysuccinimide activation group. DBD-S-M-Pro targets chiral amino-functional compounds under alkaline conditions without a condensation agent. Gradient elution was performed on a BEH C18 (100 × 2.1 mm, 1.7 μm) column with a mobile phase of 0.05% formic acid (FA) in 10 mM ammonium acetate (CH3COONH4) and 0.1% FA in acetonitrile or methanol. The efficiency of the chiral resolution was evaluated under excitation and emission wavelengths of 450 nm and 560 nm, respectively. The 19 chiral amino acids were separated in the range of 1.45–14.84. The resolutions of almost all DL-amino acids exceeded 1.5; the exceptions were serine (Ser) and lysine (Lys), with resolutions of 1.45 and 1.46, respectively. In addition, a new approach was devised for the simultaneous analysis of four chiral amino acids (DL-Glu, DL-Ala, DL-Val, and DL-Phe) in human hair. These amino acids were analyzed in the range of 12.5–400 pmol, with R2 ≥ 0.9990, limits of detection (S/N = 3) of 4–10 pmol, and intraday and interday precisions of 0.57–6.23%. The average spikes in the hair recoveries were 89.76–111.54%, and the matrix effects were 92.47–102.40%. Next, the contents of free chiral amino acids in the hair samples of 10 healthy volunteers (five males and five females) were analyzed with this method, and the differences were compared. The developed DBD-S-M-Pro provides a novel strategy for the sensitive determination of free chiral amino acids in living organisms.
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International Journal of Electrochemical Science
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2023
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IF 1.5
ZhiZhong Xie,Guanghui Chen,Zhien Liu,Xinxin Zhu,Dan Liu,Rong Li,Deyu Qu,Junsheng Li
Serious shuttle effect and sluggish reaction kinetics are the two major barriers that limit the cathode cycling stability in lithium-sulfur batteries. In this study, we deviate from the prevalent approach compositing sulfur with various carbonaceous materials by introducing electrocatalysis concept in lithium-sulfur chemistries. Two-dimensional graphene has been used as model system to support electrocatalyst Pt. Uniform dispersion of Pt nanoparticles on graphene layers not only demonstrate to preferential adsorption of soluble polysulfide species, but also catalyze efficiently transformation to long-chain polysulfides in the subsequent redox process. The result rGO-Pt/S composite shows a 29.5% enhancement in capacity over pristine rGO/S electrode. More impressively, rGO-Pt/S electrode exhibits good cycling stability at a high rate of 2 C corresponding to a tiny capacity fading rate of 0.01% per cycle over 300 discharge/charge cycles. Thus, this work provides a facile strategy for improving the performance of Li-S batteries toward practical application.
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DIAMOND AND RELATED MATERIALS
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2023
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IF 4.1
Baijian Feng,Zihao Chen,Na Li,Yongguang Bi,Fansheng Kong,Zhong Wang,Shaofan Tan
In this work, for the first time, biomass-derived carbon dots (AMP-CDs) with strong water solubility, antioxidant activity and good biocompatibility were synthesized by a one-step microwave method using Allium macrostemon Bunge polysaccharides (AMP) as the main carbon source, L-cysteine as the nitrogen and sulfur source, and phosphoric acid as the phosphorus source. The results showed that sphere-like AMP-CDs with an average particle size of about 2.34 ± 0.49 nm were successfully prepared, with good resistance to salt and photobleaching, and maintained high fluorescence intensity under normal pH conditions in human body. AMP-CDs were highly resistant to 2,2-diphenyl-1-pycrylhydrazyl (DPPH), 2,2′-Azinobis- (3-ethylbenzthiazoline-6-sulphonate) (ABTS) and hydroxyl radical (·OH) with significantly higher scavenging ability than AMP , with IC 50 (μg/mL) of 10.240, 7.265, and 574.730, respectively. In addition, AMP-CDs can be selectively used for the sensitive detection of Cr 6+ with the limit of detection was 5.25 μM, and satisfactory results were obtained for the Cr 6+ recovery experiments of actual environmental samples. In vitro cytotoxicity and hemolytic activity assays showed that AMP-CDs have good biocompatibility and can smoothly enter cells for clear imaging. Therefore, AMP-CDs are likely expected to be applied as a potential antioxidant and metal ion detection probe in the field of drug and food, environmental and biological scenario samples for metal ion detection analysis.
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ACS Applied Polymer Materials
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2023
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IF 5
Yumiao Su,Wenmu Li
Proton exchange membranes prepared from poly(aryl sulfone)s still need to overcome the drawbacks of chemical stability in acidic environments and low electrical conductivity due to water loss at high temperatures. Herein, we synthesized densely sulfonated poly(aryl sulfone) proton exchange membranes containing a 1H-imidazo[4,5-F][1,10]-phenanthroline moiety on the side chain with a metal ion coordination function. The coordination of 1H-imidazo[4,5-F][1,10]-phenanthroline groups to metal ions can effectively prevent the formation of •OH radicals from homolytic cleavage of H2O2 catalyzed by metal ions. Since the conditions for the continuous formation of •OH radicals are fundamentally eliminated, the antioxidant stability of the membrane material is greatly improved. Mesoscale microscopic simulations showed that 1H-imidazo[4,5-F][1,10]-phenanthroline has the effect of inducing phase separation, endowing the proton exchange membrane with a larger hydrophilic structural domain and possibly constructing a better connected channel for proton transport. Notably, these membranes can efficiently capture the Fe2+ and Fe3+ ions to form stable [Fe(phen)3]2+ and [Fe(phen)3]3+ interconnection points, respectively, which could not only enforce the water retention and the mechanical properties of the membranes but also serve as a catalyzed point to prevent H2O2 from undergoing homolytic cleavage and forming •OH radicals.
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Materials Today Physics
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2023
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IF 11.5
Wen-Fa Chen,Xiao-Ming Jiang,Bin-Wen Liu,Guo-Cong Guo
Infrared (IR) nonlinear optical (NLO) material with a concurrently wide band gap and significant NLO coefficient in a single crystal is an incompatible but addressable challenge. Hence, for the first time, the AgGaS 2 structure evolved into an Ag-based sulfide system integrating dual s -block elements, guiding the discovery of two NLO crystals named AMgAgGa 6 S 11 (A = K, 1 ; Rb, 2 ). Structurally, title phases possess a novel NLO functional motif [AgGa 6 S 17 ] assembled by two C 2 -type supertetrahedra through a shared [AgS 4 ] tetrahedron, in which the electropositive cations A + and Mg 2+ are embedded. Thus, compounds 1 and 2 display emulative band gaps (3.15 and 3.25 eV, exceeding that of 2.65 eV in AgGaS 2 ) toward optimizing the laser-induced damage thresholds (3.1 and 3.2 × AgGaS 2 @1064 nm). Remarkably, the noncentrosymmetric phases 1 and 2 exhibit moderate second-harmonic generation (SHG) responses (0.6 and 0.7 × AgGaS 2 @1910 nm), the greater-than-commercial half of the AgGaS 2 . To the best of our current knowledge, an experimental birefringence of 1 and 2 (0.029 and 0.027, @546 nm) is first observed in quinary ordered chalcogenides , indicating that samples 1 and 2 meet phase-matching conditions at the incident laser of 1910 nm. All these observations demonstrate that crystals 1 and 2 can become prospective NLO materials. This research will pave the way for discovering excellent IR NLO crystals with wide band gaps and impressive NLO coefficients by incorporating multiple strong electropositive elements into chalcogenides .
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Nanomaterials
·
2022
·Vol. 12
·期 22
·3994
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IF 5.719
Zhanwu Wang,Yingrui Sui,Meiling Ma,Tianyue Wang
Cu2ZnSn(S,Se)4(CZTSSe) films are considered to be promising materials in the advancement of thin-film solar cells. In such films, the amounts of S and Se control the bandgap. Therefore, it is crucial to control the concentration of S/Se to improve efficiency. In this study, Cu2MnxZn1−xSnS4(CMZTS) films were fabricated using the sol-gel method and treated in a Se environment. The films were post-annealed in a Se atmosphere at various temperature ranges from 300 °C to 550 °C at intervals of 200 °C for 15 min to obtain Cu2MnxZn1−xSn(S,Se)4(CMZTSSe). The elemental properties, surface morphology, and electro-optical properties of the CMZTSSe films were investigated in detail. The bandgap of the CMZTSSe films was adjustable in the scope of 1.11–1.22 eV. The structural propeties and phase purity of the CMZTSSe films were analyzed by X-ray diffraction and Raman analysis. High-quality CMZTSSe films with large grains could be acquired by suitably changing the selenization temperature. Under the optimized selenization conditions, the efficiency of the fabricated CMZTSSe device reached 3.08%.Keywords:Cu2ZnSn(S,Se)4film;Mn-doping;solar cells;properties;selenization temperature
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JOURNAL OF CATALYSIS
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2022
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IF 8.047
Leisheng Che,Jinqiu Guo,Zhiwei He,Hongbo Zhang
We report here that the reduction degree of the metal at the catalytic interface dominates the reactivity of acetylene hydrogenation, mainly in terms of turnover rates (TORs) and activation energies, which could certainly cause the switch of kinetically relevant steps (KRS) from “C 2 H 3 *+H*” over Ce(OH)SO 4 ·xH 2 O dispersed Pd catalyst to “C 2 H 4 *+H*” elementary step over Pd/CeO 2 . Besides, a compact kinetic model has been established to describe the reaction process and the dissociative mechanism was confirmed by H 2 /D 2 exchange experiment. Meanwhile, the rate-determining step (RDS) and the main adsorbed species of the reaction were confirmed by systematic kinetic studies as well as in-situ FTIR analysis. More importantly, with the aid of parity fitting and gas isothermic adsorption analysis, the energetic relationship among the steps along with the acetylene hydrogenation is quantitatively described, which provides a good support and complement for the previous research, and helps researchers build up advanced reaction systems.
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CERAMICS INTERNATIONAL
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2022
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IF 5.532
Chengjuan Wang,Yanxiang Wang,Haotian Jiang,Xiaodan Xu,Yang Yue,Bowen Cui,Mengfan Li,Zhenhao Xu
Highly efficient and multifunctional electromagnetic wave (EMW) absorbers which can be easily processed are desirably required. Herein, cupric ammonia is creatively adopted as the catalyst precursor of the in-situ growth of carbon nanotubes (CNTs) onto carbon fiber (CF) during chemical vapor deposition . Typically, when prepared at 750 °C, N/S co-doped bamboo-like amorphous CNTs/CF was successfully synthesized, while some Cu nanoparticles were remained in CNT forests. The sample obtains an excellent absorption toward EMWs, demonstrating a minimal reflection loss of −59.28 dB at 14.1 GHz with an ultrathin thickness of 1.42 mm. Concurrently, it is over a relatively broad effective absorption bandwidth (EAB) of 3.3 GHz (12.3–15.6 GHz) with 31% loading in the paraffin matrix. And the EAB value of CA-700 reaches 3.7 GHz (14.3–18 GHz) at merely 1.45 mm. The satisfying attenuation performance mainly originates from the synergistic effects of continuous three-dimensional conducting networks, abundant interfaces, sufficient defects, and the well impedance matching. Moreover, all as-prepared samples could be potentially used as reinforcements of resin matrix composites with high strength . Therefore, a facile route is provided to produce thin, lightweight, superior and high-strength EMW absorbing materials based on CF and CNTs.
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JOURNAL OF ASIA-PACIFIC ENTOMOLOGY
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2022
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IF 1.58
Shan-shan Gao,Dong-yu Li,Zhuang-kun Huo,Yong-lei Zhang,Yi-zhuo Cao,Yue-yao Tan,Xin-long Guo,Jia-hao Zhang,Kun-peng Zhang,Rui-min Li
Insect glutathione S-transferases (GSTs) play a crucial role in the detoxification of exogenous compounds, especially insecticides and plant allelochemicals. A sigma class GST gene, TcGSTS7 , mediates the response to eugenol in Tribolium castaneum . However, the mechanism underlying this effect remains largely unknown. In this study, TcGSTS7 , which exhibits a structural motif and domain organization characteristic of GSTs, was cloned from the T. castaneum genome. Spatiotemporal expression analysis revealed that TcGSTS7 was most highly expressed at the late larva stage and was mainly expressed in the fat body and epidermis of larvae and adults, suggesting that TcGSTS7 may play a potential role in the protection against toxic xenobiotics in T. castaneum . Furthermore, the expression of TcGSTS7 was significantly induced after exposure to eugenol, while RNA interference (RNAi) targeting TcGSTS7 enhanced the sensitivity of the beetle to eugenol, indicating that TcGSTS7 is involved in the tolerance of T. castaneum to this insecticide. Interestingly, the depletion of TcCncC , which encodes a transcription factor of the CncC pathway that has been associated with the regulation of detoxification-related genes in insects, led to a reduction in the TcGSTS7 transcript level following exposure to eugenol, which suggests that TcGSTS7 acts downstream of the CncC pathway. Combined, these results indicated that TcGSTS7 participates in the tolerance of T. castaneum to phytochemicals in a CncC pathway-dependent manner. These findings have implications for the development of novel drugs for use in pest control.
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