RSC Advances
·
2023
·Vol. 13
·期 17
·11635-11641
·
IF 3.9
Jiru Guo,Yanxia Zheng,Yuchao Li,Zijian Wen,Xiuxu Shen,Yansong Zhao
4,4′-Dichlorodiphenyl sulfoxide is the main raw material for the manufacture of polysulfone, polyether sulfone and other engineering plastics. It is also an intermediate for medicines, dyes and pesticides, which has been widely utilized in engineering plastics, fine chemicals and other fields. The alkylation of chlorobenzene with thionyl chloride can give 4,4′-dichlorodiphenyl sulfoxide as a product using Lewis acidic ionic liquids. In this work, metal-based methylimidazolium ionic liquids were synthesized, which were found to be efficient catalysts for alkylation reactions. The molar ratio of different metal chlorides to 1-butyl-3-methyl imidazole chloride and the influence of different metal chlorine additives on the catalytic Lewis acid center were investigated. The fissionable species of AlCl3 in ionic liquids will enhance the acidity of ionic liquids and, thus, promote the catalytic performance of ionic liquids. Under the optimized reaction conditions, the conversion rate of excess chlorobenzene was 45.3% and the selectivity of 4,4′-dichlorodiphenyl sulfoxide was 31.9%.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 4
·047505
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IF 3.9
Yao Xiong,Ruimei Wu,Lulu Xu,Ying Zhong,Yu Ge,Yangping Wen,Hang Yao,Weiqi Zhou,Shirong Ai
Extraordinary electronic performance and unique structural characteristic of black phosphorene (BP) often is used as electrode modified materials in electrochemical sensors. In this paper, a machine learning (ML) strategy for phosphorene nanozyme sensor and its the intelligent of clenbuterol (CLB) in pork and pig serum samples is prepared. The silver nanoparticles decorate BP to prevent oxidative degradation of BP surface and further hybridize with multi-walled carbon nanotubes (MWCNTs) composites containing nafion (Nf) treated with isopropanol (IP) to improve environmental stability and electrocatalytic capacity of BP. Back-propagation artificial neural network (BP-ANN) model combined with genetic algorithm (GA) is employed to optimize sensor parameters such as BP concentrations, MWCNTs concentrations and ratio of VNf:VIP, and compared with orthogonal experimental design (OED). Least square support vector machine, radial basis function and extreme learning machine are implemented to establish quantitative analysis model for CLB. The results showed that the CLB response current of BP sensor by BP-ANN-GA was improved 9.02% over OED method. Compared with the traditional linear regression, three models displayed better predictive performance, and LS-SVM was the best with the R2, RMSE and MAE and RPD of 0.9977, 0.0303, 0.0225, and 18.74, respectively. The average recoveries of CLB in pork and pig serum was 98.66% ∼ 101.67%, and its relative standard deviations was 0.19% ∼ 0.84%, indicating that electrochemical sensor using machine learning for intelligent analysis of CLB in animal-derived agro-products products was both feasible and practical.
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高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Xiaoyu Yang,Ying Qi,Peng Wei,Qixu Hu,Jian Cheng,Yahong Xie
Carbon-based CsPbI 2 Br perovskite solar cells (C–PSCs) have the advantages of low cost and stable performance, but the poor contact and energy mismatch between the perovskite layer and the carbon electrode lead to low power conversion efficiency (PCE). In this work, uniform spindle-shaped Fe 3 O 4 @NC composites have prepared by calcining Fe-based metal organic framework (Fe-MOF) NH 2 -MIL-88B(Fe), which has synthesized by solvothermal reaction using 2-aminoterephthalic acid as nitrogen and carbon sources. Using Fe 3 O 4 @NC composite and UV-Ozone treated Fe 3 O 4 @NC composite (Fe 3 O 4 @NC UVO) as the interfacial layer between the perovskite layer and the carbon electrode, the devices with a structure of FTO/SnO 2 /CsPbI 2 Br/interfacial layer/Carbon exhibit a maximum PCE of 12.25%, which is about 19.28% higher than that of the pristine device. The improved optoelectronic performance is mainly attributed to more matched energy level, denser interface contact, better carrier separation performance and better conductivity. After 19 days of storage at room temperature and ambient humidity, Fe 3 O 4 @NC UVO device has retained 87% of the initial PCE. This work provides a simple and effective strategy to improve the PCE and stability of carbon-based CsPbI 2 Br PSCs with Fe-MOFs-derived carbon materials .
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JOURNAL OF CHEMICAL PHYSICS
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2023
·Vol. 158
·期 13
·
IF 4.4
Ye Xiaofang,Cai Hongkun,Xu Tie,Ni Jian,Zhang Jianjun
In recent years, perovskite solar cells (PSCs) have been attracting more and more attention. Although perovskite materials have high defect tolerance, defects remain the main factor that seriously affects the efficiency and stability of PSCs. Herein, the ionic liquid of 1-butyl, 3-methylimidazolium acetate ([BMIM][ACO]) was introduced into the SnO2/perovskite interface for the first time. Thanks to the dipoles formed by ILs spontaneously, the work function of SnO2 was reduced and the transport ability of carriers was improved as well. Moreover, the Lewis acidity and lone pair electrons of [BMIM][ACO] contribute to the passivation of I– defects, Pb2+ defects, or Pb-I anti site defects. In addition, the presence of dipoles will repel the approach of photogenerated holes and the reverse transport of electrons, reducing the recombination of defect sites through field-effect passivation. The solar cell with efficiency of 19.43% was obtained under such a dual passivation effect, and the best device maintained 75.21% of the initial efficiency after 80 h of continuous illumination.
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高影响因子
JOURNAL OF CATALYSIS
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2023
·
IF 7.3
Zhiwei He,Qifeng Lei,Weili Dai,Hongbo Zhang
Alkene epoxidation is a very important reaction process for the selective generation of chiral products, usually performed in some solvent(s) with different polarity, solubility and proton properties. These physical properties are entangled and do not explain very well whether they are mainly against population or stability of the reaction intermediates during catalysis. Here, we investigate how different solvents with known polarity properties (CH 3 CN, (CH 3 ) 2 CO, CH 3 OH, etc.) affect the C 6 H 10 transformation over Ti-Beta catalysts. Combining kinetic measurements, thermodynamic investigations and isotope experiments, the solvent was found not to change the reaction path or mechanism, with C 6 H 10 epoxidation most likely following the Eley-Rideal mechanism and C 6 H 10 O hydration following a Langmuir-Hinshelwood mechanism, and both nucleophile and carbonium were found to be involved in the transition state (c.a. SN 2 process) of hydration. However, in the epoxidation reaction of C 6 H 10 with CH 3 CN and (CH 3 ) 2 CO as solvents, the reaction order of [C 6 H 10 ] is subtly different and the epoxidation rate increases with increasing volumetric fraction of CH 3 CN in the binary mixture, which indicates that the solvent affects the concentration of dissolved C 6 H 10 surrounding the active sites and leads to the corresponding differences in activity and product selectivity. Nevertheless, the measured apparent reaction barrier (energy difference between transition state and MASIs) spans the elementary step of solvent modification, thus allowing for the observation of negligible solvent thermodynamic modification. Collectively, these findings provide clear evidence of solvent effects on alkene epoxidation and can be easily extended to some other reactions in solvents.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 17
·9626-9634
·
IF 11.9
Hao Wu,Mi Wang,Wanbao Wu,De Bai,Yihong Liang,Shunyou Hu,Wen Yu,Peng He,Jiaheng Zhang
Multi-stimuli-responsive devices have attracted much attention in the field of smart windows due to their rich color-adjustable effect and high energy efficiency. However, most multi-stimuli-responsive color-adjustable devices have insufficient stability and complex preparation processes, which impede their industrialization. In this work, thermo- and electro-dual-responsive devices were fabricated by preparing thermochromic ion gel electrolytes and combining them with electrochromic films. Locating thermochromic and electrochromic materials in different functional layers reduces their mutual influence and prevents a decline in their single performances. The thermochromic ion gel electrolytes with a lower critical solution temperature (LCST) phenomenon were obtained from a simple UV-curing method with polyurethane acrylate oligomers and ionic liquids. Compared with traditional LCST hydrogels, the ion gels undergo phase transitions without a volume change, exhibit better thermal and ambient stability, and possess a wide electrochemical window. They can be widely used as electrolytes for various electrochromic materials, resulting in color-changing performance and cycling stability comparable to those of organic solution and ionic liquid electrolytes. The ion gels' LCST effect and the electrochromic layers' color-changing characteristics endow the devices with a dual-responsive feature and improved optical modulation ability. This gives the devices great application potential in smart windows and indoor decorations.
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高影响因子
Solar RRL
·
2023
·Vol. 7
·期 11
·2300105
·
IF 7.9
Yifei Feng,Zhongbao Que,Shuaibo Zhai,Jintian Li,Jiaqi Gong,Ruiyuan Hu,Wei Liu,Jing Hu,Xing'ao Li,Liang Chu
Additive engineering has become an effective method to passivate the grain boundary defects of perovskite films for enhanced photovoltaic performance. Herein, inspired by daily life, a 502 adhesive is directly introduced into perovskite films to improve the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs), where the perovskite grain boundaries are self-healed through spontaneous polymerization of the 502 adhesive by tracing water molecules in the air at room temperature. The C=O and –CN groups in 502 adhesive molecules provide double bonding points to chemically anchor with perovskite gain boundaries, which effectively block the invaded channels of moisture and oxygen into the perovskite film. Meanwhile, the –CN groups can combine with the deficient coordination of Pb 2+ to passivate the deep defects. The optimized PSCs via incorporation of 502 adhesive into perovskite film achieve PCE of 20.12% and remarkable long-term and moisture stability compared to the control device with PCE of 17.30%.
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Nanoscale
·
2023
·Vol. 15
·期 17
·7803-7811
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IF 6.7
Tian Sun,Tong Chen,Jiahao Chen,Qiang Lou,Zihao Liang,Guijun Li,Xiaoyun Lin,Guoshen Yang,Hang Zhou
Despite the impressive developments in perovskite optoelectronic devices, their long-term stability remains a major challenge. Chemical reactions and ion exchange at the metal/perovskite contact interface are two significant factors that lead to the failure of perovskite devices. To address this issue, a titanium nitride (TiN) layer is introduced as a robust corrosion-resistant coating between perovskite films and metal electrodes. By introducing TiN layer, a perovskite photodiode with dark current down to 3.25 × 10−11 A cm−2 is realized. Consequently, the TiN-based perovskite photodiode shows a specific detectivity of 1.21 × 1014 cm W−1 Hz1/2, which is approximately two orders of magnitude higher than that of the control device without a TiN layer. Under continuous illumination of a 520 nm green light for 576 000 cycles, the responsivity of the TiN-based photodetector remains at 94.27% of its initial value. The TiN-based photodetector exhibits superior stability under thermal stress. After aging at 85 °C for 572 h, the TiN-based photodetector retains 72% of its initial responsivity. Using the TiN-based photodiode, a perovskite image sensor containing 64 × 64 pixelated perovskite photodiodes is constructed over an amorphous silicon thin-film transistor (TFT) backplane. The perovskite image sensor exhibits real-time imaging capability and long-term stability for over 6 months. This study highlights the importance of using metallic nitrides to achieve high-performance and air-stable perovskite devices for optoelectronic applications.
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高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Lili Gao,Ping Hu,Yingzhen Hu,Yingjie Hu,Jing Zhang
Here, the crystal synthesis, crystal structures, optical band gaps and application in devices of (C 4 N 2 H 6 )PbI 3 and (C 4 N 2 H 6 )PbBr 3 are researched and discussed. Novel hybrid 1D perovskite single crystals based on pyrazine were obtained by reacting the organic cation C 4 N 2 H 6 with lead iodide and bromide. The band gaps of (C 4 N 2 H 6 )PbI 3 and (C 4 N 2 H 6 )PbBr 3 compounds are 2.71 and 2.82 eV, respectively, which consistent with the structure distortion. The 1D crystals of (Py)PbI 3 and (Py)PbBr 3 assisted the device efficiency from 20.15% to 22.12 and 22.38%, respectively.
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Journal of Energy Chemistry
·
2023
·
IF 13.1
Qixu Hu,Xiaoyu Yang,Ying Qi,Peng Wei,Jian Cheng,Yahong Xie
Optimizing the interfacial properties between perovskite and carbon electrodes has always been an important way to improve the photoelectric conversion efficiency (PCE) of carbon-based perovskite solar cells (C-PSCs) and facilitate their commercialization. In this paper, nitrogen-doped graphene quantum dots (N-GQDs) with fluorescent properties were successfully prepared using inexpensive coal as raw material by a facile and environmentally friendly chemical reagent oxidation. The results show that the electron-rich pyridinic nitrogen in N-GQDs can act as Lewis bases to form coordination bonds with uncoordinated lead ions by sharing electron pairs, thereby reducing the defect density and nonradiative recombination of photo-generated electron-hole, and extending lifetime of charge carriers. In addition, due to the passivation of N-GQDs, the hysteresis effect of the device is significantly reduced and the long-term stability is also improved. By optimizing the concentration, the PCE of C-PSCs achieved a maximum of 14.31%, which was improved by 20.25% compared with 11.90% of the pristine C-PSCs. This work provides a facile, environmentally friendly and efficient strategy for improving the overall performance of C-PSCs using inexpensive coal-based N-GQDs.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 11
·2212523
·
IF 19.924
Yalun Xu,Ruiming Li,Songxue Bai,Yanyan Li,Zhenglin Jia,Yujie Yang,Enkang Cui,Fang Yao,Du Wang,Cheng Lei,Qianqian Lin
Chalcogenide-based semiconductors have recently emerged as promising candidates for optoelectronic applications, mainly benefiting from their facile and low-cost processability, chemical versatility, and tunable optoelectronic properties. Despite the recent success of chalcogenide-based thin-film photovoltaics, they have been barely leveraged in photodetection, mainly due to the complicated charge transport related to the trap states. In addition, most of the chalcogenide photodetectors are reported for broadband, visible photodetection, which is facile but lacks of impact for real applications. However, it is also possible to modulate the charge carrier dynamics of chalcogenide-based materials, and devise novel devices, which can possess extra compelling features. These possibilities provide strong incentives for a detailed study on the chalcogenides-based narrowband photodetectors, which are achieved by a filterless, charge collection narrowing strategy. The optimized narrowband photodetectors also exhibit extremely fast-response (≈240 ns), relatively low dark current and noise, large linear dynamic range, and most importantly tunable spectral discrimination covering the whole range from UV to NIR. These devices also demonstrate great potential for imaging and communication.
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ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Caixia Ren,Yue He,Shiqi Li,Qinjun Sun,Yifan Liu,Yukun Wu,Yanxia Cui,Zhanfeng Li,Hua Wang,Yuying Hao,Yucheng Wu
Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted tremendous attention recently because of their excellent photovoltaic performance . High power conversion efficiency (PCE) and long-term stability of PSCs mainly rely on high crystalline quality of perovskite film, good interface contact between functional layers and matching energy level alignment, which can be achieved by crystal growth regulation and interface engineering. Here, we demonstrate a high-performance planar heterojunction PSCs with PCBM/N2200 as double electron transport layers (ETLs). The N2200-based PSCs exhibit an average PCE of 15.50%, which obviously surpass the average PCE of 14.18% of conventional PSCs with only PCBM as ETLs. In comparison with the conventional PSCs, the PCBM/N2200 double ETLs increase built-in potential of devices and decrease interfacial energy barrier of MAPbI 3 /PCBM and then result in higher V oc . Moreover, non-fullerene material N2200 can efficiently inhibit the aggregation of PC 61 BM, promote perovskite surface grain growth and passivate perovskite interface defect. All these are beneficial for electron transfer and extraction, and thereby increase the short-circuit current ( J sc ) and the Fill Factor (FF) of N2200 PSCs. In addition, N2200 obviously improve the air- and illumination-stability of PSCs. These results could stem from the interaction between PbI 2 as Lewis acid and N2200 as Lewis base. This work indicate that N2200/PC 61 BM as double ETL is an effective way to get high photovoltaic performance for the inverted planar heterojunction PSCs.
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