COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zhuanhong Jia,Xiaojun Dai,Bin Liu,Yan Li,Chunmiao Bo
Advanced adsorbents with high adsorption capacity and adsorption selectivity are desirable. Here, a Zr-based metal-organic framework (MOF), UiO-66-NH 2 @poly(sodium 4-styrenesulfonate, Nass), was synthesized using the high surface area of MOFs as a substrate and the high grafting density of surface initiated-atom transfer radical polymerization (SI-ATRP). UiO-66-NH 2 @poly(Nass) was used to adsorb different dyes. The maximum adsorption capacity ( Q m ) of methylene blue (MB) and basic fuchsine (BF) was 299.8 and 789.2 mg·g −1 , respectively, which were higher than those of Sudan I (SD I, 6.340 mg·g −1 ), neutral red (NR, 188.1 mg·g −1 ), methyl orange (MO, 199.5 mg·g −1 ), and acid chrome blue K (AK, 122.3 mg·g −1 ). The adsorption isotherms and kinetics were investigated, and it was confirmed that the Langmuir isotherm and the pseudosecond-order kinetic model fit our adsorbents. In the binary mixed solution, the removal rate (R) of MB reached 64.44%, while that of MO was only 3.340% for MB/MO. R was 64.29% for MB and 21.97% for AK for MB/AK and 97.45% for BF and 30.03% for MO for BF/MO, verifying the preferential selectivity to adsorb basic dyes. The superior adsorption was ascribed to multiple interactions, including electrostatic interaction , hydrogen bonding , and π–π accumulation. In addition, the effect of grafting poly(Nass) on the pore size of UiO-66-NH 2 was studied. The excellent stability showed that the R dropped by less than 15.62% after five consecutive cycles. The UiO-66-NH 2 @poly(Nass) was applied in the determination of MB and BF in water, crucian carp, and green shrimp. Good linearity was observed for MB (R 2 = 0.9971) and BF (R 2 = 0.9993) in the range of 0.2–30 and 0.5–50 μg·mL -1 , respectively, with satisfactory recoveries (in the range of 87.45–101.3% for MB and 90.34–98.86% for BF), achieving favorable practicability.
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Journal of Energy Chemistry
·
2021
·
IF 9.676
Yueqing Deng,Zhengji Zhou,Xin Zhang,Lei Cao,Wenhui Zhou,Dongxing Kou,Yafang Qi,Shengjie Yuan,Zhi Zheng,Sixin Wu
The development of kesterite photovoltaic solar cells has been hindered by large open-circuit voltage ( V oc ) deficit. Recently, Sn Zn deep point defect and associative defect cluster have been recognized as the main culprit for the V oc losses. Therefore, manipulating the deep-level donor of Sn Zn antisite defects is crucial for breaking through the bottleneck of present Cu 2 ZnSn(S,Se) 4 (CZTSSe) photovoltaic technology. In this study, the Sn Zn deep traps in CZTSSe absorber layer are suppressed by incorporation of Ge. The energy levels and concentration of Sn Zn defects measured by deep-level transient spectroscopy (DLTS) decrease significantly. In addition, the grain growth of CZTSSe films is also promoted due to Ge implantation, yielding the high quality absorber layer. Consequently, the efficiency of CZTSSe solar cells increases from 9.15% to 11.48%, largely attributed to the 41 mV V oc increment.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2020
·期 7
·626-630
·
IF 2.529
Min Li,Guan-Cheng Xu,Wen-Bo Xin,Yin-Qiang Zhang
Graphical The new organic-inorganic hybrid compound (CH 3 NH 3 ) 4 [InCl 6 ]Cl has been successfully synthesized by reaction of methylammonium with indium(III) chloride tetrahydrate. It undergoes a first-order phase transition accompanied with an obvious step-like dielectric switching. A new organic-inorganic phase transition material (CH 3 NH 3 ) 4 [InCl 6 ]Cl ( 1 ), has been successfully synthesized and characterized. The compound undergoes a reversible first-order phase transition at Curie temperature Tc=284 K, accompanied with a wide hysteresis of 12 K, which investigated by differential scanning calorimetry (DSC). The temperature dependence of the dielectric permittivity discloses an obvious step-like dielectric anomaly. Single crystal X-ray diffraction reveals that the order-disorder transition of the [InCl 6 ] 3– anion and the methylammonium cation were the main factor drove the phase transition from high temperature phase with the space group P 2/ m to low temperature phase with the space group P 2/ n . This finding indicates that In-based organic–inorganic hybrids compounds can be used to build phase transition materials, which broaden the way for exploring dielectric switching materials.
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Nano Research
·
2024
·
IF 9.5
Zhu Shengjie,Huang Danqing,Luan Qichen,Li Yang,Gan Jingjing,Zhao Yuanjin,Sun Lingyun
Macrophages play a pivotal role in systemic lupus erythematosus (SLE) therapy. Efforts have been made to develop multifunctional drug delivery systems capable of directing macrophage polarization. Here, we present a novel hyaluronic acid methacrylate (HAMA) hydrogel microparticle encapsulating multiple cytokines for SLE remission though enhancing macrophage functions. The HAMA microparticles loaded with monocyte chemotactic protein-1 (MCP-1) and interleukin-4 (IL-4) were fabricated by using a microfluidic technology. The released MCP-1 facilitates the aggregation of inflammatory macrophages, after which IL-4 induces the macrophage phenotype shift from inflammatory M1 to immune-protective M2, thus restoring immune balance. We have demonstrated in MRL/lpr mice that the hydrogel microparticles could improve their efficacy of intraperitoneal drug delivery, modulate immune function, and attenuate the disease symptoms. These results suggest that our proposed microparticles delivery platform has potential clinical value for treating autoimmune diseases.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Bin Xu,Chuanhe Ma,Xiaoshuang Lu,Yulin Liu,Qiao Zhang,Ye Chen,Pingxiong Yang,Junhao Chu,Lin Sun
Cu 2 ZnSn(S,Se) 4 (CZTSSe) has received considerable attention as the promising absorber for thin-film solar cells. For traditional selenization process, the issues of Sn-loss, lower S/(S + Se) ratio, and unsuitable back contact interface extensively exist in CZTSSe solar cells. In present work, SnSe and SnS powder is introduced during selenization process, respectively. The effects of SnSe and SnS powder on CZTSSe films and the Mo/CZTSSe interface have been comprehensively studied. We discover that SnS not only can provide the Sn-contained vapor in selenization process but also offer S-vapor. Due to the presence of Sn-contained vapor, the number of voids in the CZTSSe absorber and Mo/CZTSSe interface decreases remarkably and the Sn-loss is effectively suppressed. The thickness of Mo(S,Se) 2 layer is significantly reduced, and the S/(S + Se) ratio in CZTSSe bulk obviously increases owing to the presence of S-vapor. As a consequence, the open-circuit voltage and fill factor of the solar cell significantly increase and the CZTSSe solar cell with efficiency of 10.07% (total area) is successfully fabricated.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Shuo Song,Liwei Wang,Xinxin Guo,Hongyu Liu,Bingqiang Cao,Jinkai Li,Wenzhi Wang
The application of all inorganic halide perovskite quantum dots (PQDs) in the field of optoelectronic devices has made exciting progress. However, the preparation of CsPbX3·PQDs with high water stability is still a great challenge. In this article, the direct synthesis of CsPbCl3·PQDs in water using 4-chlorobutyric acid (CBA) and oleamine (OLA) as surface ligands was proposed for the first time. Transmission electron microscopy spectra show that the QDs synthesized in water have good crystallinity and monodispersity. At the same time, CBA-CsPbCl3·PQDs synthesized by this method continuously emitted light in water for more than 400 h. In contrast, OA-CsPbCl3·PQDs were almost completely quenched after only 20 min of mixing with water. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and hydrogen spectroscopy nuclear magnetic resonance were used to verify the passivation effect of CBA on the surface of QDs. The carboxyl ligands provided by CBA form a stable hydrophobic shell on the surface of CsPbCl3·PQDs, which makes CsPbCl3·PQDs have excellent water stability. In this study, CsPbCl3·PQDs with excellent water stability were synthesized with CBA/OLA as the surface ligand for the first time, which provides an effective way to explore perovskite light-emitting diodes with good water stability.
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JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Xianzhao Shao,Maifang Zuo,Changchun Zhao,Wei Wang,Zhizhou Li
2,4-diamino-6-(4-pyridyl)-1,3,5-triazine (DAPT) was synthesized and analyzed by nuclear magnetic resonance and Fourier transform infrared spectroscopy , thermogravimetric and elemental analysis techniques as well as by high-resolution transmission electron microscopy. DAPT solubility (in tetrahydrofuran , methanol, ethanol, n-propanol, and isopropanol) in the 288.15–318.15 K range was measured using the static analytical technique. We also performed quantum chemical calculations using Gaussian 09 and determined influence of solvent polarity and solute-solvent interactions on DAPT solubility. Experimental results were treated by modified Apelblat and Buchowski-Ksiazaczak ( λh ) equations as well as by the Wilson and nonrandom two-liquid (NRTL) models. All four models showed excellent agreement. This study provides valuable data for the purification of DAPT at the preferential crystallization procedure.
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JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Mei Hong,Bingyu Wang,Xiaoling Xu,Peng Bin,Jingyu Zhang,Qiang Zhang
The catalytic membrane reactor (CMR) is recognized as one of the most effective strategies to treat the organic wastewater system. Yet so far, inefficiency, lack of bactericidal ability, and serious membrane fouling have limited its further application. In this study, we designed a novel polyacrylonitrile (PAN) catalytic separation membrane loaded with gold nanoparticles (Au NPs) via a facile photopolymerization method. The Au NPs on the catalytic separation membrane (PAN-Au) surface can serve as a high-performance catalyst, and the ligand of the 4-vinylpyridine (4VP) acts as an efficient protecting ligand for Au NPs to avoid leakage and agglomeration. The PAN-Au membrane was applied to CMR, which can one-step catalytic separation of nitrophenols and methylene blue efficiently in a flow-through mode (up to 97.5% over multiple cycles of reuse). Even after contamination with organic dyes, the PAN-Au membrane can still recover the catalytic separation performance by self-cleaning. Moreover, a remarkable antibacterial (with an efficiency of ≈100%) activity of the PAN-Au membrane, with a strong correlation with the small-sized and well-distributed Au NPs loaded on the membrane surface . The tremendous catalytical, self-cleaning, and antibacterial performance of the PAN-Au membrane provides new insights for the rational design of flow CMR for industrial applications.
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CATALYSIS LETTERS
·
2024
·Vol. 154
·期 8
·4756-4767
·
IF 2.3
Liu Kande,Wang Sitan,Zheng Lishan,Lou Shifeng,Meng Xuan,Cao Fahai,Liu Naiwang,Shi Li
The catalytic performance of Hβ zeolite treated with different concentration of NaOH on the alkylation of tert-butanol with phenol was studied. The effect of NaOH concentration on the crystallinity, morphology, textural property and acidity of Hβ zeolite was studied by X-ray diffraction (XRD), scanning electron microscope characterization (SEM), N 2 adsorption–desorption, Fourier transform infrared spectroscopy (FT-IR) and pyridine adsorption infrared spectra (Py-IR) techniques. A certain concentration of NaOH treatment can regulate the pore structure of Hβ zeolite and remove part of framework aluminum and framework silicon, thus achieving the purpose of regulating the pore structure and acidity of the catalyst. Though lower Bronsted to Lewis acid amount ratio when treated NaOH concentrations were 0.15 mol/L, leading to the increasing of selectivity to 4-TBP. The Hβ-0.2 M showed the high selectivity of 90.21% for synthesis of 4-tert-butyl-phenol (4-TBP), compared with the unmodified parent zeolite, the selectivity of 4-TBP improved 16.7%. Graphical Abstract
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PROGRESS IN PHOTOVOLTAICS
·
2015
·Vol. 23
·期 12
·1828-1836
·
IF 7.584
Xinsheng Liu,Chao Chen,Liang Wang,Jie Zhong,Miao Luo,Jie Chen,Ding-Jiang Xue,Dengbing Li,Ying Zhou,Jiang Tang
Sb 2 Se 3 has attracted great research interest very recently as a promising absorber material for thin film photovoltaics due to its suitable bandgap, high absorption coefficient, and non-toxic, low cost, and earth abundant nature. In this work, a significant efficiency improvement to 4.8% of superstrate cadmium sulfide (CdS)/Sb 2 Se 3 solar cells is obtained by the controlled addition of oxygen during thermal evaporation of Sb 2 Se 3 films. Systematic materials and device physics characterization reveal that oxygen addition during Sb 2 Se 3 film evaporation significantly improves the CdS/Sb 2 Se 3 heterojunction quality through effective passivation of interfacial defect states, resulting in a substantial enhancement in device circuit voltage and short circuit current density. The 4.8% device is the highest efficiency thus far reported for Sb 2 Se 3 thin film solar cells. Copyright © 2015 John Wiley & Sons, Ltd.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2013
·Vol. 160
·期 11
·H787
·
IF 2.588
Mi Ouyang,Zhiyan Fu,Xiaojing Lv,Bin Hu,Pingjing Wang,Senbiao Huang,Yuyu Dai,Cheng Zhang
Copolymer based on 4-(9H-carbazol-9-yl)-N,N-diphenylaniline (CDPN) and 3,4-ethylenedioxythiophene (EDOT) was electrochemically synthesized and characterized. Through electrochemical methods, FTIR spectroscopy and scanning electron microscopy (SEM) analysis, the resulting polymer was confirmed to be a copolymer rather than a blend or a composite of the respective homopolymers. Besides, the spectroelectrochemical and electrochromic properties of the copolymer (P(CDPN-co-EDOT)) films were investigated. According to the spectroelectrochemical analysis, the copolymer film revealed distinct electrochromic properties with four colors: claret red, green, cadetblue, and blue. At the neutral state of the copolymer, the π-π* transition absorption peak was located at 530 nm and the energy gap was calculated as 1.67 eV. The copolymer film showed a maximum optical contrast (ΔT%) of 36% in visible region with a switching time of 1.8 s and 43% in the near-IR region with a switching time of 2.5 s. The coloration efficiency (CE) of P(CDPN-co-EDOT) were calculated to be 332 cm2·C−1 (at 530 nm), 277 cm2·C−1 (at 810 nm) and 552 cm2·C−1 (at 1100 nm). Repeated cyclic voltammograms indicated that the copolymer had reasonable stability because of the existence of EDOT units.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Ying Fang,Yuanyuan Meng,Chunming Yuan,Chunhui Du,Kun-Peng Wang,Shaojin Chen,Zhi-Qiang Hu
Organic fluorescent molecules with π-conjugated system have shown great importance in numerous applications including bioimaging and optoelectronics. Planar aggregation-induced emissive (AIE) organic compounds with efficient solid-state luminescence are rarely developed and urgently needed in various applications. In this work, highly planar 4-styrylbenzonitrile derivatives have been synthesized. Most of these compounds show strong AIE properties with hundred-fold fluorescent enhancement. Moreover, these molecules are deep blue emissive in solid state, exhibiting good to excellent fluorescence quantum efficiency. The single crystal analysis shows that adjacent molecules could form special J-type aggregation. The intramolecular rotations are efficiently restricted by various noncovalent interactions. These molecular arrangements could be essential for the observed strong emission in aggregated and solid state. This work has paved a new path to efficient AIE-active organic emitters with highly planar conformations from 4-styrylbenzonitrile structure.
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