CHEMISTRY OF MATERIALS
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2013
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IF 8.238
Shuijin Lei,Chunying Wang,Lei Liu,Donghai Guo,Chuanning Wang,Qingliu Tang,Baochang Cheng,Yanhe Xiao,Lang Zhou
Group I–III–VI ternary chalcogenides have attracted extensive attention as important functional semiconductors. Among them, Cu–In–S compounds have seen strong research interest due to their potential applications in high-efficiency solar cells. However, the controllable synthesis of Cu–In–S nanostructures with different phases is always difficult. In this research, zinc-blende CuInS2, wurtzite CuInS2, and spinel CuIn5S8 could be selectively synthesized using spinel In3–xS4 as the precursor by a simple solvothermal method. X-ray powder diffraction was used to determine the phase and crystal structure, and transmission electron microscopy was employed to characterize the morphologies of the as-prepared samples. Experiments showed that the acidity–basicity of the reaction system and the coordination and reducibility of the capping ligands were crucial to the final phases of the products. The UV–vis–NIR spectra of the three phases all exhibited a broad-band absorption over the entire visible light and extending into the near-infrared region, and the zinc-blende, wurtzite, and spinel Cu–In–S nanocrystals showed band gaps of 1.55, 1.54, and 1.51 eV, respectively, which indicates their potential applications in thin-film solar cells.
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APPLIED SURFACE SCIENCE
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2014
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IF 2.538
Zhiyin Chao,Lan Wang,Linyong Song,Yifeng Zhou,Wangyan Nie,Pengpeng Chen
Surface hydroxyl-functionalized poly(styrene- co -hydroxyethyl acrylate) [P( S - co -HEA)] microsphere were used to prepare P( S - co -HEA)/silver composite particles. Based on the weak interaction between silver ions and hydroxyl, silver ions were adsorbed onto the polymer surface and reduced by diethanolamine (DEA). The morphology of P( S - co -HEA)/Ag was easily controlled by the molar ratio of DEA/AgNO 3 . The composite particles were characterized by SEM, XRD, and UV–vis spectroscopy. The obtained P( S - co -HEA)/Ag particles with small and denser silver nanoparticles showed a high efficient activity to catalyze reduction of methylene blue (MB). While the P( S - co -HEA)/Ag particles with big and denser silver nanoparticles showed highly sensitive Raman enhanced performance.
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ELECTROCHIMICA ACTA
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2017
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IF 4.798
Panpan Sun,Taian Huang,Ziyu Chen,Liangyu Tian,Huihui Huang,Niu Huang,Sha Zhou,Min Long,Yihua Sun,Xiaohua Sun
The design and facile fabrication of highly efficient, cost-effective and earth abundant counter electrode material on an electrode surface is highly desirable for the application of dye-sensitized solar cells (DSSCs). Herein, using a N,N-dimethylformamide based solution process, transition metal chalcogenide Ni x S y films have been obtained by spin-coating a NiCl 2 -thiourea (Ni-Tu) solution combining mild thermal treatment. XRD, SEM and TEM characterizations reveal that the current procedure allows for phase composition (Ni 3 S 2 , NiS and NiS-NiS 2 ), crystallinity , morphology (film uniformity and compactness) control of the films through simple adjusting Ni/S ratio in the precursor solution. Electrochemical analysis indicates that the FTO supported Ni 3 S 2 and NiS films exhibit excellent electrocatalytic activity toward the reduction of triiodide, resulting in higher photo-electric conversion efficiencies of 6.86% and 6.95% when used as counter electrode in DSSCs, versus 6.66% for Pt. In particular, even without the support of conductive FTO layer, Hall effect measurements and electrocatalytic analysis reveal that pristine Ni x S y films exhibit good electrical conductivity and electrocatalytic activity, yielding a highest photo-electric conversion efficiency of 4.41% when used as counter electrode in DSSCs. Our study thus provides a facile procedure which allows for composition, morphology optimization and high performance for low-cost, large-scale DSSC application.
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JOURNAL OF CHROMATOGRAPHY A
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2016
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IF 3.926
Sheng Tang,Jian-De Liu,Qin Bin,Ke-Qin Fu,Xiao-Chen Wang,Ying-Bin Luo,Shao-Hua Huang,Zheng-Wu Bai
In order to comprehensively understand the influence of coordination of the substituent at 2-position with those at 3- and 6-positions on the properties of chitosan derivatives, a series of chitosan 3,6-bis(arylcarbamate)-2-(amide)s (CACAs) and the related chiral stationary phases (CSPs) were prepared and reported in the present study. Specifically, chitosan was N -acylated with carboxylic acid anhydrides, and then further derivatized with various aryl isocyanates to afford CACAs, from which a class of coated-type CSPs were prepared. When the substituent introduced on the acyl group at 2-position and those on the phenyl group of the carbamates at 3- and 6-positions were fittingly combined, these prepared CACAs based CSPs would exhibit powerful chiral recognition ability, further resulting in a class of promising chiral separation materials with excellent enantioseparation performance. Meanwhile, these newly developed materials with suitable molecular weight also bear a high tolerability towards organic solvents, even including pure tetrahydrofuran, thus broadening their application in enantiomeric separation.
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PubMed
高影响因子
RSC Advances
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2014
·Vol. 5
·期 6
·4184-4190
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IF 3.708
Qingwen Tian,Yong Cui,Gang Wang,Daocheng Pan
The metal chalcogenides are excellent choices as absorbers and buffer-layers in thin film solar cells. Versatile chemical approaches provide endless possibilities to prepare metal sulfide precursor solutions. Recently, Cu2ZnSnS(Se)4 thin films have played an important role in fabricating low-cost and high-efficiency solar cells. Here, we present a robust and low-cost 1,2-ethanedithiol/ethanolamine/2-methoxyethanol ternary solution process to prepare Cu2ZnSnS4 precursor solution and high-quality Cu2ZnSnS4 thin films. Low-cost Cu2O, ZnO and SnO are used as the raw materials, which can be easily dissolved in the 2-methoxyethanol solution of 1,2-ethanedithiol and ethanolamine at room temperature in air. By tuning the composition of the Cu2ZnSn(S,Se)4 thin film with a selenization process, an active-area power conversion efficiency of 7.34% has been achieved for Cu2ZnSn(S,Se)4 solar cell.
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Materials Science & Engineering C-Materials for Biological Applications
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2017
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IF 4.164
Suli Hu,Wenhong Hu,Zhenguang Li,Lixia Ren,Yunhui Zhao,Xiaoyan Yuan
Biomedical applications of the synthetic polymers with amino acid side moieties have been studied in light of their biocompatibility. In this work, poly(amino acid-hydroxyethyl methacrylate)s with lysine (Lys)/leucine side moieties were synthesized via reversible addition-fragmentation chain transfer polymerization, and were verified with intrinsic chirality. For biomedical uses, their antibacterial abilities as well as hemolysis and cytotoxicity were investigated. The results indicated that there were similar inhibitions for d - and l -enantiomeric polymers against Staphylococcus aureus when the polymer concentrations were lower than ~ 300 μg/mL, while the polymer containing d -Lys moiety was more effective against Escherichia coli . The d -enantiomers at concentrations < 500 μg/mL showed relatively lower hemolysis, and all the polymers showed good in vitro cell viability with concentrations lower than 200 μg/mL. It was indicated that the antibacterial amino acid-related synthetic polymers could be potentially applied for biomedical applications.
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PubMed
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Journal of Water Process Engineering
·
2024
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IF 6.3
Huda D. Abdul kader,Saad H. Ammar,Waqar A. Abdulnabi,Zaid H. Jabbar,Haidar Taofeeq,A. Al-Farraji
The development of new and effective photocatalytic heterojunctions for green environmental remediation under visible-illumination has received great attention in recent years. Herein, we assembled BiVO 4 -decorated S-doped g-C 3 N 4 (BVO/SCN) heterojunctions with different BVO:SCN ratios (5 to 30 wt% BVO) to achieve effective photocatalytic heterojunctions for visible-light-prompted degradation of antibiotic TC in a three-phase split-plate airlift photocatalytic reactor, in which successfully reducing charge recombination rate. Obviously, BVO/SCN endorsed greater photodecomposition performance of TC under visible-light (decompose 95.7 % of TC in 60 min), which compared to SCN was approximately 5-times enhancement. The TC mineralization efficiency of BVO/SCN hybrid (84 % within only 60 min) was higher than that of the individual BVO and SCN. The efficient internal self-mixing generated in the airlift photocatalytic reactor greatly contributed to increasing the TC degradation efficiency by improving the mass transfer and the irradiation process of the mixture, in which the degradation efficiency increased from 88 % without airlift to 95.7 % in airlift reactor. On the other hand, the high degradation efficiency was credited to the extended absorbing of visible-light and great separation of photo-prompted carriers through the formation of Z-type heterojunction between BVO and SCN. As recorded by the trapping investigates, the • O 2 − and • OH radicals act as the main reactive-species in the TC photocatalytic degradation process. Moreover, High durability of the developed BVO/BCN heterojunctions was obtained, in which 89.4 % TC degradation was still recorded after five rounds.
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LANGMUIR
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2024
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IF 3.7
Jiani Xu,Zhongyi He,Liping Xiong,Yinglei Wu,Lei Guo,Lili Li,Renhui Zhang
A high yield of environmentally friendly N,S-codoped (N,S-CDs) and N-doping carbon points (N-CDs) carbon dots was achieved through a biochemical oxidation reaction at room temperature in this study. Acetaldehyde, sodium hydroxide, benzotriazole (BTA), and 2-mercaptobenzimidazole (MB) with a similar structure were used as raw materials. The microstructure and properties of the corrosion inhibitor for Q235 steel were evaluated by various experiments. The results demonstrated enhanced corrosion inhibition rates of the N,S-CDs compared to the N-CDs using electrochemical tests (93.83% vs 77.65%) and weight loss experiments (96.35% vs 91.65%) at 50 mg/L, respectively, compared to the blank material, indicating that N,S codoping can significantly improve the corrosion inhibition effect of carbon dots. The significant improvements were attributed to the formation of dense adsorption films and the hydrophobic properties of N and S-CDs nanoparticles on the steel surface, leading to an effective barrier against corrosion. The findings from this study provide important experimental data for potential industrial applications and hold important practical value in the field of pickling corrosion inhibitors.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Fenglong Chen,Lingxin Meng,Hongqi Liang,Jingmei Xu
Sulfonated poly(arylene ether ketone sulfone)s (SPAEKS) were prepared by polycondensation reaction as polymer matrix. Dopamine hydrochloride was sulfonated and then modified onto the surface of the ceria (CeO 2 ) nanoparticles. The sulfonated dopamine ceria (SPD@CeO 2 ) was added to the polymer matrix as an inorganic nanofiller to prepare a series of composite membranes. The structure and morphology of modified inorganic nanoparticles and membranes were characterized and analyzed by means of SEM, 1 H NMR, PXRD and FTIR. Among all the composite membranes obtained, S-SPD@CeO 2 -2 (the quality of the SPD@CeO 2 percentage was 2%) had the most outstanding comprehensive performance. Oxidative stability of S-SPD@CeO 2 -2 reached 95.33% due to the free radical scavenging effect of CeO 2 . At 80 °C, 100% relative humidity (RH), the proton conductivity of S-SPD@CeO 2 -2 was 218.93 mS cm −1 . Meanwhile, this membrane also had good mechanical property (Young's modulus was 1332.59 MPa) and dimensional stability (swelling ratio was 34.34% at 80 °C). Besides, the maximum power density and open circuit voltage (OCV) of S-SPD@CeO 2 -2 membranes reached 445.48 mW cm −2 and 0.917 V. Both of the above results were better than pure membranes (304.45 mW cm −2 and 0.872 V). Comprehensive the above data, S-SPD@CeO 2 -2 had considerable potential for application as fuel cell diaphragm.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Hongyi Huang,Shaoyuan Liu,Zeyu Kang,Yiwen Zhu,Chengbin Zhang,E Xiang,Zhang Lin,Weizhen Liu
Vancomycin fermentation residue (VFR) urgently needs proper treatment due to its complex and hazardous nature. Pyrolysis is a promising treatment method, while the product characteristics of VFR pyrolysis remain unclear. Therefore, the influence of different atmospheres and stepwise pyrolysis (including one-stage reaction in N 2 or CO 2 and two-stage reaction in N 2 ) on pyrolysis behavior, product characteristics, and N/S migration mechanism during VFR pyrolysis were investigated for the first time in this work. The results showed that VFR mainly decomposed at 180–600 °C, forming non-condensable gas, bio-oil, and biochar. The main released gases included CO 2 , H 2 O, NH 3 , HCN, SO 2 , and H 2 S, whereas the N-containing pollutant gas, notably NH 3 , should be focused due to its high emission (>10 %). Bio-oil was rich in N-containing compounds with a content exceeding 46 %, mainly consisting of Indolizne (9.2–11.5 %), 5H-1-Pyrindine (5.0–9.9 %), and Indole (8.4–9.0 %), and 9-Octadecenamide, (Z)- (1.8–10.1 %). Moreover, the effects of different conditions on the product characteristics were as follows: For the one-stage reaction, compared to N 2 , the CO 2 atmosphere promoted the formation of alcohols (intended product, increasing 2.2–14.6 %), whereas the two-stage reaction in N 2 inhibited alcohol production (decreasing 1.1–2.5 %). At CO 2 condition, the harmless temperature of VFR reduced from 600 °C (pyrolysis in N 2 ) to 400 °C. Both CO 2 (increasing 0.6–1.5 %) and the two-stage reaction in N 2 (increasing 0.4–1.0 %) retained more N in the solid. Kinetics showed that the pyrolysis process of VFR conformed to diffusion models and reaction order models (F2/D1/F3/D1 for N 2 and F2/D2/F3/D1 for CO 2 ). The VFR transformed to the chemicals and fuels mainly through the deamination, desulfurization, dehydration, decarboxylation, and dehydrogenation reactions. This work provides guidance for harmless disposal and resource utilization during VFR pyrolysis.
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VACUUM
·
2024
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IF 3.8
Wanli Zhang,Meigui Ou,Chunlin Yang
In this paper, sulfur and nitrogen co-doped graphene quantum dots (S, N -GQDs) were compounded with titanium dioxide (TiO 2 ) nanorods by chemical surface modification. S, N -GQDs in diameter of 5 nm are uniformly distributed on the surface of TiO 2 nanorod arrays. The presence of C S bonds in S, N -GQDs not only broaden the absorption of visible light by GQDs, but also enhanced the visible light absorption of S, N -GQDs/TiO 2 composites. The photocurrent densities of S, N -GQDs/TiO 2 were 3.66 times that of unmodified TiO 2 . The calculation results of density functional theory (DFT) showed that the band gap of S, N -GQDs is significantly reduced compared to GQDs, indicating that electrons are more likely to transit to higher energy levels and form more activation sites. Moreover, compared with TiO 2 , the DFT calculation results of band gap, density of states and charge density difference of S, N -GQDs/TiO 2 showed that S, N -GQDs/TiO 2 had a wide wavelength of visible light absorption and better electron-hole separation ability, resulting in the superior photoelectrocatalytic property. This research provides favorable analytical value for the development of photocatalysts based on heterostructures .
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55738
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IF 2.7
Liangyong He,Yuqing Yang,Bin Yang,Weiqiang Hu,Zhengzhi Zheng,Tianyu Lu,Haijia He,Jiasheng Qian,Yaoyang Chen,Weiguo Zhang,Yuchao Ke
In recent years, optical diffusion film materials with high transmittance and high haze have been widely reported, while there is relatively rare research on their functionalization and practical application especially in real scenario. In this work, optical diffusion films using polymethyl methacrylate (PMMA)@TiO 2 @SiO 2 (P@T@S) composite microspheres were fabricated, which exhibited sufficiently high light transmittance and haze. The binding mode of PMMA microspheres and nanoparticles suggested that PMMA microspheres with a positive surface potential combined with nanoparticles with a negative surface potential through electrostatic attraction to achieve mutual binding. The prepared P@T@S composite microspheres showed better heat and swelling resistance than those of PMMA microspheres. The P@T@S diffusion film, whose excellent light diffusion effect was clearly demonstrated, exhibited the best optical performance among all optical diffusion films prepared. After passing through the P@T@S diffusion film, the laser light was not only uniform but also bright. The findings from this work can provide some insight into further research on optical diffusion films applied in optoelectronic device areas.
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