ACS Applied Polymer Materials
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2022
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IF 4.855
Pengfei Zhao,Rongxue Ji,Jie Lao,Chunli Jiang,Bobo Tian,Chunhua Luo,Hechun Lin,Hui Peng,Chun-Gang Duan
With the advantages of wide bandwidth, low power consumption, high propagation speed, and excellent interconnectivity, the light-tunable synapse is regarded as one of the most promising candidates to pave the way for constructing neuromorphic computing and overcoming the von Neumann bottleneck. Herein, an optoelectronic synaptic memristor based on zinc oxide/poly(3-hexylthiophene) (ZnO/P3HT) heterojunction is fabricated via a simple two-step spin coating process. The prepared device can simulate typical neuromorphic manners, such as excitatory postsynaptic current (EPSC), paired-pulse facilitation (PPF), the transformation from short-term plasticity (STP) to long-term plasticity (LTP), and “learning-experience” behavior by modulating the applied light pulses. In addition to the optoelectronic synaptic behaviors, our device incorporates light logic functions (“AND” and “OR” operations) and optical information detection and memory functions analogous to those in the human’s visual recognition memory system.
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Journal of Materials Chemistry C
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2022
·Vol. 10
·期 22
·8815-8823
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IF 8.067
Runda Guo,Weizhuo Zhang,Xin Li,Linyuan Lian,Hongting Chen,Chencheng Peng,Liang Sun,Shiyuan Liu,Jianbing Zhang,Lei Wang
Blue emitting CsPb(Br–Cl)3 perovskite nanoparticles (NPs) play an important role in optoelectronic applications. However, the synthesis of stable blue perovskite NPs with excellent photoluminescence quantum yield (PLQY) is still challenging. Here, a new strategy of conveniently using strontium halides and amine halides for simultaneous doping and surface passivation of CsPb(Br–Cl)3 perovskite NPs is proposed. Through experimental studies and calculations, it is found that divalent Sr2+ cations can partly replace the B-site Pb2+ ions in the lattice structure of perovskite NPs and cause a slight lattice contraction, not only passivating the defects but also providing chances for bluer NPs. As a result, the deep-blue CsPb(Br–Cl)3 perovskite NPs with PL emission centered at 455 nm and a high PLQY of 96% were obtained. In addition, a white light-emitting device (WLED) with the NPs as an emissive layer exhibited a maximum power efficiency of 76 lm W−1 with Commission International de L’Eclairage (CIE) coordinates of (0.33, 0.34). These findings provide fundamental insights into the excited state dynamics of colloidal cesium lead halide (CsPbX3) perovskite NPs that can be used as components of LEDs for practical applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Rui Zhao,Yacong Hu,Wei Ding,Ke Ren,Xinyi Gou,Chun Zhao,Huaili Zheng
Phosphite [P(III)], an emerging eutrophication pollutant, has attracted limited attention in recent years. Owing to the higher solubility and resistance to biotransformation of P(III), oxidation of P(III) to phosphate [P(V)] is considered to be necessary to enhance P(III) removal. Herein, an efficient and regenerable magnetic La 2 (CO 3 ) 3 /CoFe 2 O 4 /biochar composite (LCB) was constructed through a facile one-pot hydrothermal method to treat phosphite-laden wastewater. LCB coupled with peroxymonosulfate (PMS) exhibited satisfactory P(III) removal performance through a one-step process for simultaneous oxidation and adsorption of P(III). The adsorption capacity of LCB/PMS for P(III) (71.94 mg/g) was much higher than that of LCB. LCB/PMS system showed high P(III) removal efficiency of 96.62 %, wide pH ranging from 4.0 to 9.0, and good reusability. It also worked well in the existence of anions and humic acid. The quenching experiments and electron spin resonance tests (ESR) revealed the critical role of SO 4 • - in the P(III) oxidation process. Characterization results demonstrated that electrostatic attraction and ligand exchange were responsible for P(III)/P(V) adsorption. Moreover, LCB/PMS system presented desirable performance in eliminating a series of typical organic and inorganic phosphorus. The LCB/PMS system provides a promising and sustainable technology for the purification of P(III)-contaminated water.
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高影响因子
ENVIRONMENTAL POLLUTION
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2022
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IF 9.988
Yu Sun,Guanghua Lu,Peng Zhang,Ying Wang,Xin Ling,Qi Xue,Zhenhua Yan,Jianchao Liu
Aquatic natural colloids are closely related to the environmental behavior of pollutants, which may affect their bioavailability in aquatic organisms. This study explored the potential mechanisms of the natural colloids at environmentally relevant concentrations affecting the bioaccumulation process of benzophenone-3 (BP3) in zebrafish ( Danio rerio ). The results of kinetic model fitting showed that the natural colloids decreased the uptake and loss rate of BP3 by zebrafish but prolonged the time to reach the cumulative equilibrium, eventually resulting in a higher cumulative concentration in zebrafish. According to the tissue concentration at equilibrium and the results of toxicokinetic analysis, the presence of high molecular colloids could enhance the bioaccumulation of freely dissolved BP3 due to its high desorption rate with BP3 in the intestines of fish, increasing the freely dissolved BP3 concentrations to which zebrafish were exposed. Both natural colloids and BP3 could enhance the cell permeability of zebrafish, which allowed colloid-bound BP3 to directly enter the fish and accumulate in its muscle. Besides, although both natural colloids and BP3 could cause the metabolic disorders in adult zebrafish, they affected the physiological and biochemical activities of zebrafish through different pathways. The disturbance of glutathione metabolism in zebrafish induced by natural colloids may be the reason for the diminished ability of zebrafish to clear and transform BP3 in the mixture system. The carrier effect of natural colloids and reduced clearance ability of zebrafish eventually increased the bioaccumulation of BP3 in zebrafish. This study highlights the significance of natural colloids at environmentally relevant concentrations on the biological effects of emerging contaminants in actual waters, however, natural colloids are always ignored in most field investigation of pollutants, which would ultimately lead to an underestimation of the true ecological risk of pollutants.
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高影响因子
Journal of Flow Chemistry
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2022
·Vol. 12
·期 3
·317-325
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IF 3.264
Xu Qilin,Li Guosi,Zhu Fucheng,Chen Naidong,Chen Cuiwu,Yu Zhiqun
N -(3-Amino-4-methylphenyl)benzamide ( 1 ) is a crucial building blocks of many drug candidates. In this paper, a continuous flow microreactor system was developed to synthesize 1 and determine intrinsic reaction kinetics parameters. By screening the acylating reagents and reaction conditions, 1 was obtained by the selective acylation of 4-methylbenzene-1,3-diamine ( 2 ) with benzoic anhydride ( 3 ). Since the two amine groups in 2 are in different chemical environments, parallel by-products and serial by-products coexist, which makes the selective monoacylation process relatively complicated. To reveal the reaction process clearly, reaction rate constants and their 95% confidence intervals, activation energies, pre-exponential factors were acquired by kinetics study in microflow system. The established kinetic model can calculate the selectivity and conversion of the acylation reaction, which are in good agreement with the experimental results. Subsequently, the kinetic model was used to optimize reaction conditions, as a result, 1 was synthesized in the microreactor with a yield of 85.7% within 10 min.
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BIORESOURCE TECHNOLOGY
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2022
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IF 11.889
Yue Wang,Bowen Wu,Tian Ma,Yaozu Mi,Hanyi Jiang,Haohao Yan,Peichao Zhao,Shuo Zhang,Linxuan Wu,Lei Chen,Hailian Zang,Chunyan Li
Low-temperature biorefineries inhibit the multiplication of undesired microorganisms, improve product purity and reduce economic costs. Herein, to improve the 2,3-butanediol (2,3-BD) bioconversion efficiency from hemicellulose, a psychrotrophic hemicellulose-degrading strain Raoultella terrigena HC6 with high β-xylosidase activity 1520 U/mL was isolated and genetically modified. Xylan (hemicellulose replacement) was depolymerized into xylooligosaccharides (XOS) and xylose by HC6, which were further converted into 2,3-BD. Transcriptomic analysis revealed that β-xylosidase gene ( xynB ) and xylose isomerase gene ( xylA ), which are beneficial for increasing the carbon flux from xylan to 2,3-BD, were significantly upregulated 56.9-fold and 234-fold, respectively. A recombinant strain was constructed by overexpressing xynB in HC6, which obtained 0.389 g/g yield of 2,3-BD from hemicellulose extracted from corn straw at 15 °C. This study proposed a promised strategy for the bioconversion of agricultural waste into 2,3-BD at low temperatures and provides a basis for future efforts in the achievement of carbon neutrality.
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高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Wenjing Chen,Yifan Song,Wenxing Zhang,Renren Deng,Yixi Zhuang,Rong-Jun Xie
The discovery of X-ray-charged persistent luminescence (PersL) in fluoride nanoparticles enables these materials to emit photons without real-time excitation, which provides a great possibility for the development of new luminescent nanotechnologies. In this work, we developed NaLuF4:Mn nanoparticles with intense green PersL and functionalized surfaces and accordingly achieved time-gated imaging of latent fingerprints (LFPs) with Level 3 details. These surface-modified NaLuF4:Mn nanoparticles exhibited near-spherical morphology, long-lasting emission for several hours, appropriate trap depth distribution, and tight chemical bonding with amino acids from fingerprints, thus greatly improving the accuracy of LFP imaging in a variety of environments. The developed NaLuF4:Mn PersL nanoparticles are expected to find broad applications in the fields of LFP imaging and in vivo biological imaging.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 27
·12934-12940
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IF 3.925
Hansen Yang,Zhimiao Wang,Hualiang An,Qiusheng Yang,Wei Xue,Fang Li,Yanji Wang
Theobromine is an important pharmaceutical intermediate and food additive. We have developed a green method for theobromine synthesis, namely catalyst-free methylation of 3-methylxanthine with dimethyl carbonate (DMC). The effects of various solvents on the reaction were investigated; H2O was found to be the most appropriate solvent. The bond energies of C–O in DMC and N–H in 3-methylxanthine were calculated at the M06-2x/6-311G(d,p) level, and the role of the solvent was examined theoretically. The use of H2O as the solvent and the effects of DMC hydrolysis on the reaction were investigated. The results show that DMC hydrolysis was, to some extent, beneficial to theobromine synthesis. The reaction conditions were optimized. When the molar ratio of DMC to 3-methylxanthine was 11 : 1 and the 3-methylxanthine dosage was 0.1 g per mL-H2O, reaction at 160 °C for 9 h gave a 3-methylxanthine conversion of 89.9% with 98.2% theobromine selectivity.
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Nanomaterials
·
2021
·Vol. 11
·期 12
·3242
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IF 5.076
Yu Sun,Jin Chen,Fengchao Wang,Yi Yin,Yan Jin,Jun Wang,Xiaogai Peng,Ruiyi Han,Canyun Zhang,Jinfang Kong,Jing Yang
Nowadays, Mn-doping is considered as a promising dissolution for the heavy usage of toxic lead in CsPbX3perovskite material. Interestingly, Mn-doping also introduces an additional photoluminescence band, which is favorable to enrich the emission gamut of this cesium lead halide. Here, a solution spraying strategy was employed for the direct preparation of CsPbxMn1−x(Br,Cl)3film through MnCl2doping in host CsPbBr3material. The possible fabrication mechanism of the provided approach and the dependences of material properties on Mn-doping were investigated in detail. As the results shown, Pb was partially substituted by Mn as expected. With the ratio of PbBr2:MnCl2increasing from 3:0 to 1:1, the obtained film separately featured green, cyan, orange-red and pink-red emission, which was caused by the energy transferring process. Moreover, the combining energy of Cs, Pb, and Mn gradually red-shifted resulted from the formation of Cs-Cl, Pb-Cl and Mn-Br coordination bonding as MnCl2doping increased. In addition, the weight of short decay lifetime of prepared samples increased with the doping rising, which indicated a better exciton emission and less defect-related transition. The aiming of current work is to provide a new possibility for the facile preparation of Mn-doping CsPbX3film material.Keywords:MnCl2doping;CsPbxMn1−x(Br,Cl)3;thin films;solution spraying
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Environmental Science-Nano
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2021
·Vol. 8
·期 12
·3590-3602
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IF 8.131
Yu Sun,Guanghua Lu,Peng Zhang,Xin Ling,Ranran Zhou,Zhenhua Yan,Jianchao Liu
The environmental behavior of pollutants in water is associated with aquatic colloids, especially organic colloids, which may be swallowed by aquatic organisms. In this study, bovine serum albumin (BSA) and phycocyanin (PCA) as organic protein colloids were used to evaluate their impacts on the accumulation and biotoxicity of benzophenone-3 (BP3). A bioaccumulation kinetic model based on daphnids (Daphnia magna) and zebrafish (Danio rerio) was established to quantify the effects of colloids on the different absorption pathways for BP3. When the freely dissolved concentration of BP3 was fixed at 100 μg L−1, environmentally relevant concentrations of colloids always acted as a carrier in the intestine, transferring BP3 to lipids, and the positive carrier efficiency decreased with the increase of colloid concentration. Protein colloids also enhanced passive absorption, of which the efficiency increased with colloid concentration. However, the contribution of the carrier effect of colloids in the intestine was almost negligible. Two aquatic organisms obtained BP3 mainly from water, and the upper limit of bioaccumulation in the colloid matrix was dependent on the absorption of colloid–BP3 by organisms or the mass transfer on the surface of organisms. Besides, BP3 caused thyroid hormone content and gene expression disorders on the hypothalamus–pituitary–thyroid axis in zebrafish larvae. The opposite colloid concentration dependence of gene expression was observed for BSA and PCA. The colloids may affect the active BP3 concentration in organisms through their adsorption and desorption behaviour outside and inside organisms, thereby affecting the toxicity of pollutants. This study suggests reconsidering the true ecological risks of pollutants bound to organic colloids in natural environments.
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ACS Applied Energy Materials
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2021
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IF 6.024
Deyu Gao,Mengjia Li,Liqun Yang,Chenglin Wang,Xueni Shang,Xiaohui Ma,Cuncun Wu,Boxue Zhang,Hongwei Song,Cong Chen
Defects in the perovskite photoactive layer will cause severe non-radiative recombination and lead to severe efficiency loss and stability degradation. In this work, a type of cation, 3-APA+, was added to the perovskite precursor to passivate the cation defect and interface/surface defects. Our results reveal that incorporating 3-APA+ with amino and carboxyl functional groups could enhance electronic properties of the interfacial and bulk due to a more efficient charge transfer between the bulk and interfaces and the reduced electronic defect energy levels. The hybrid cation-based perovskite film exhibits a longer photoluminescence lifetime and a lower density of trap states, indicating the effectively passivated vacancies, thus reducing the non-radiative recombination pathway. In addition, the bifunctional group can cross-link the perovskite grains through hydrogen bonds to form a dense perovskite film with a larger grain size. Consequently, the best performing devices with an optimized power conversion efficiency of 20.4% showed an efficiency loss of only 7% at a maximum power tracking of 2000 s at full sunlight intensity. Therefore, directly adding 3-APA+ to the precursor can provide ideas for passivating defects in the perovskite material and improving its stability.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Minhui Zheng,Zhoulu Wang,Qiang Ru,Haikuo Fu,Jun Zhang,Zikang Pan,Jiaqi Wang,Qizhen Xie,Xing Zhao
NASICON type KTi 2 (PO 4 ) 3 decorated by NTCDA-derived carbon layer (KTP/NC) was prepared as anode material to obtain sustainable lithium/sodium ion storage (LIBs/SIBs). Due to its prominent capacitance, good electronic conductivity and ability to constrain volume, the KTP/NC composite realizes highly electrochemical kinetics both in LIBs and SIBs . For LIBs, the KTP/NC composite delivers a superior reversible capacity of 598.1 mAh g −1 after 200 cycles at 0.5C, impressive cyclability with 225.5 mAh g −1 after 3000 cycles at an ultrahigh current density of 26.1 C and conspicuous rate performance of 160.6 mAh g −1 even at 52.2 C. In addition, the composite has a wide operation-temperature window with favorable capacities of 147.1–372.9 mAh g −1 from −10 °C to 50 °C. As for SIBs, the KTP/NC composite maintains a stable discharge capacity of 112.5 mAh g −1 after 700 cycles at a current density of 2.6 C and conspicuous rate performance of 86.7 mAh g −1 at 5.2 C. The KTP/NC anode exhibits discharge capacities of 29.9–112.6 mAh g −1 from −10 °C to 40 °C. The results demonstrate that the KTP/NC composite would be a promising electrode material for LIBs and SIBs.
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