Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 36
·12213-12223
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IF 7.393
Xuefeng Xia,Dan Zhang,Xiaofeng Wang,Zonghu Xiao,Fan Li
In recent years, the nickel oxide (NiOx)-based planar p–i–n perovskite solar cell (PSC) has progressed rapidly. Nevertheless, poor electrical properties of NiOx, unoptimized band alignment between NiOx and perovskites, as well as pervasive defects and unwanted chemical redox reactions at NiOx/perovskite interfaces have severely limited the device efficiency and stability. It is of particular interest to explore a facile approach to address these issues simultaneously. Herein, an effective carbon-quantum-dot-hybridized NiOx (CQD-hybridized NiOx) hole transport layer (HTL) is fabricated via hybridizing a kind of environmentally friendly CQD with NiOx. By virtue of the rich surface polar groups of CQDs, hybridization of such CQDs with NiOx can efficaciously upgrade the electrical properties of NiOx HTLs, thereby reducing ohmic loss and energy level offset at NiOx/perovskite interfaces. Meanwhile, the application of CQD-hybridized NiOx HTLs can boost the nucleation and growth of perovskite layers, thus suppressing the formation of interfacial defects/traps and reducing interface-mediated nonradiative recombination losses. Moreover, such CQD-hybridized NiOx HTL can also diminish redox reactions at the NiOx/perovskite interface, improving interface stability. Based on this CQD-hybridized NiOx HTL, a champion PCE of 20.53% with enhanced stability has been achieved. More strikingly, the optimized device delivers a Voc as high as 1.16 V, the highest Voc for CH3NH3PbI3 PSCs based on NiOx HTLs as far as we know. These results demonstrate that CQD-hybridized NiOx HTLs will be a promising candidate for efficient and stable planar p–i–n PSCs.
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高影响因子
TALANTA
·
2017
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IF 4.162
Fei Wang,Fan Yang,Yang Tian,Jiawei Liu,Jiwei Shen,Quan Bai
A stoichiometric displacement model for retention (SDM-R) of small solutes and proteins based on hydrophilic interaction chromatography (HILIC) was presented. A linear equation that related the logarithm of the capacity factor of the solute to the logarithm of the concentration of water in the mobile phase was derived. The stoichiometric displacement parameters, Z (the number of water molecules required to displace a solute from ligands) and lg I (containing a number of constants that relate to the affinity of solute to the ligands) could be obtained from the slope and the intercept of the linear plots of lg k' vs. lg[H 2 O]. The retention behaviors and retention mechanism of 15 kinds of small solutes and 6 kinds of proteins on 5 kinds HILIC columns with different ligands were investigated with SDM-R in typical range of water concentration in mobile phase. A good linear relationship between lg k' and lg[H 2 O] demonstrated that the most rational retention mechanism of solute in HILIC was a stoichiometric displacement process between solute and solvent molecules with water as displacing agents, which was not only valid for small solutes, but also could be used to explain the retention mechanism of biopolymers in HILIC. Comparing with the partition and adsorption models in HILIC, SDM-R was superior to them.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Jian Tang,Xianghe Meng,Fei Liang,Kaijin Kang,Tixian Zeng,Mingjun Xia,Wenlong Yin,Zheshuai Lin,Bin Kang
Four novel cyanates BaCNOX (X = Cl, Br, I, and CNO) containing linear π-conjugated anions were obtained by solid-state metathesis reactions for the first time. BaCNOCl crystallizes in a monoclinic space group P21/m with a = 5.5757(15) Å, b = 4.4925(10) Å, c = 7.850(2) Å, β = 102.38(3)°, Z = 2, whereas the remaining three compounds belong to the same orthorhombic space group Pnma with a = 8.227–8.713 Å, b = 4.290–4.552 Å, c = 10.986–11.803 Å, Z = 4. The crystal structures of these four compounds are divergent, exhibiting rich structural diversity ranging from simple to complex when X changes from Cl to Br and I, and then to CNO. Their thermal, vibrational, and optical properties were characterized in detail. Besides, the first-principles calculations reveal that all four compounds show giant optical anisotropy of Δn > 0.20 at 800 nm owing to the superior arrangement of linear (CNO)− π-conjugated groups. Successful synthesis of these cyanates not only further explains the influence of microscopic ions on the structures, but also enriches the structure chemistry of cyanates and provides enlightenment for the study of birefringence in CNO-based compounds.
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Research
·
2022
·
IF 11.036
Jiayu Di,Haojin Li,Li Chen,Siyu Zhang,Yinhui Hu,Kai Sun,Bo Peng,Jie Su,Xue Zhao,Yuqi Fan,Zhenhua Lin,Yue Hao,Peng Gao,Kui Zhao,Jingjing Chang
Exploring halogen engineering is of great significance for reducing the density of defect states in crystals of organic-inorganic hybrid perovskites and hence improving the crystal quality. Herein, high-quality single crystals of PEA2PbX4 (X = Cl, Br, I) and their para-F (p-F) substitution analogs are prepared using the facile solution method to study the effects of both p-F substitution and halogen anion engineering. After p-F substitution, the triclinic PEA2PbX4 (X = Cl, Br) and cubic PEA2PbX4 (X = I) crystals unifies to monoclinic crystal structure for p-F-PEA2PbX4 (X = Cl, Br, I) crystals. The p-F substitution and halogen engineering, together with crystal structure variation, enable the tunability of optoelectrical properties. Experimentally, after the p-F substitution, the energy levels are lowered with increased Fermi levels, and the bandgaps of p-F-PEA2PbX4 (X = Cl, Br, I) are slightly reduced. Benefitting from the enhancement of the charge transfer and the reduced trap density by p-F substitution and halogen anion engineering, the average carrier lifetime of the p-F-PEA2PbX4 is obviously reduced. Compared with PEA2PbI4, the X-ray detector based on p-F-PEA2PbI4 perovskite single-crystal has a higher sensitivity of 119.79 μC Gyair-1·cm-2. Moreover, the X-ray detector based on p-F-PEA2PbI4 single crystals exhibits higher radiation stability under high-dose X-ray irradiation, implying long-term operando stability.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Meiting Li,Bingxin Yuan,Chi Zhang,Jia Li,Xuejiao Wang
Hierarchical BiOCl/BiOI and BiO(Cl,I) photocatalysts were obtained via a solution-phase reaction for visible-light-driven elimination of aqueous pollutants, where the phase/morphology evolution, relationship between energy band/microstructure structure and photocatalytic properties, and photoreaction mechanism can be deciphered in detail. It was well-documented that the R = 8:1 BiOCl/BiOI heterojunctions with a coherent interface of Bi and O atoms showed a relatively strong redox capacity owing to their rapid Z-scheme charge transfer and large interfacial contact and eventually degraded ∼92.52% and 96.57% of rhodamine B (RhB) and tetracycline (TC) molecules under 10 min of visible light irradiation, which was larger than those of bare BiOCl and BiOI. However, their poor photocatalytic stability was proved to be unfavorable to practical applications. The best BiOCl0.88I0.12 solid solutions separately elucidated the optimal RhB and TC removal efficiency of ∼99.97% and 97.54% after 10 and 6 min of illumination, and it still maintained a high photodegradation efficiency toward RhB after five consecutive runs. The exceptional photocatalytic performance is cogoverned by the characteristics of in situ generated oxygen vacancies and defect energy levels.
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PubMed
高影响因子
FISH & SHELLFISH IMMUNOLOGY
·
2026
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IF 4.2
Yujun Liu,Gengrong Zhang,Haozhe Qu,Ziyu Hu,Maosheng He,Fei Ling,Gaoxue Wang,Tianqiang Liu
The mRNA vaccine can induce specific antibodies in Largemouth bass. • mRNA Cap (1) and poly (A) mRNA reduce RIG-I recognition of foreign mRNA in Largemouth bass. • The mRNA vaccine triggered a rapid immune response in bony fish. • Improved the survival rate of largemouth bass to 57% in LMBV infection. Largemouth bass virus (LMBV) infection poses a significant threat to largemouth bass farming in China, yet effective and safe vaccines remain scarce. In this study, we designed and evaluated four mRNA vaccine candidates against LMBV, all encoding the viral major capsid protein (MCP). The fully configured construct (LMUM) contained a 5′ cap1, untranslated regions (UTRs), and a poly(A) tail, and was produced by in vitro transcription. Each mRNA was encapsulated into lipid nanoparticles (LNPs), yielding homogeneous particles (∼110 nm diameter, ∼54 mV zeta potential) with >96% encapsulation efficiency that provided substantial protection against RNase degradation (43% of mRNA remained intact in LNP-encapsulated groups versus 10% in unprotected controls). Intramuscular immunization of largemouth bass with LNP-encapsulated LMUM (0.2 μg/g body weight) induced MCP-specific serum antibodies after primary immunization, with a strong booster response after the second dose. In the LMUM-immunized group, spleen mRNA levels of IgM and CD4 were upregulated 3.4-fold and 3.2-fold, respectively, by day 14, while the groups lacking UTR or cap/poly(A) tail failed to induce these adaptive immune markers. Interestingly, the incomplete constructs triggered stronger activation of the RIG-I pathway (RIG-I, MAVS, TBK1) than the fully modified LMUM, suggesting that the combination of cap1, UTR, and poly(A) tail helps dampen excessive innate sensing. Following a lethal LMBV challenge, the LMUM vaccine conferred 45–50% relative survival after primary immunization, which increased to 53–57% after the booster dose. In contrast, the incomplete vaccine constructs and naked mRNA gave only 10–15% survival, and control groups experienced nearly complete mortality. These results demonstrate that a fully modified mRNA-LNP vaccine against LMBV induces robust humoral and cellular immune responses and provides significant protective efficacy in largemouth bass.
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PubMed
高影响因子
FOOD CHEMISTRY
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2022
·
IF 9.231
Yulian Tang,Wenxin Gou,Xue Lv,Xuemei Zhou,Junkai Hao,Chengjie Sun,Tao Sun,Lei Hu,Zhengquan Yan
Conveniently and efficiently monitoring I − and Hg 2+ in agricultural products or drinking beverages for the protection of human health is currently a great challenge. With this aim, a Ag-Pt bimetal quantum-dot nanozyme boosted by bioactive folic acid (FA@Ag-Pt QDs) was first developed for multichannel monitoring of I − and Hg 2+ in this work using a two-step liquid-phase reduction method. Not only did the present FA@Ag-Pt QDs possess superior peroxidase-like activity with Michaelis constant ( K m ) and maximal reaction rate ( V max ) of 0.01 mM/2.95 × 10 −8 M·s −1 and 1.15 mM/3.88 × 10 −8 M·s −1 , respectively, trace Hg 2+ or I − could exclusively alter their enzyme-mimic performance with obvious color changes from blue to colorless or dark blue. I − could also strengthen the inherent fluorescence property of FA@Ag-Pt QDs. When applied for visual monitoring of I − and Hg 2+ in real beverages or iodine-containing agricultural products, the detection recoveries were 93.9 %–105.3 % and 96.8–104.3 % with low detection limits of 6.56 × 10 −8 mol/L and 4.00 × 10 −10 mol/L (S/N = 3), respectively. The recovery and detection limit for fluorescent detection of I − were 95.8 %–104.1 % and 1.75 × 10 −8 mol/L (S/N = 3), respectively. The mechanisms driving the improved peroxidase-like activity of FA@Ag-Pt QDs and their selective monitoring of Hg 2+ and I − were illustrated in detail. The proposed FA@Ag-Pt QDs will act as an efficient sensor for the practical multichannel monitoring of Hg 2+ and I − , with superior catalytic signal amplification.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Shuohan Yang,Yonghou Xiao,Wuyue Zhang,Yu Qiao,Qidong Zhao,Ning Zhang,Gaohong He
Cuprous ion-based zeolites have been proven as promising carbon monoxide (CO) adsorbents by virtue of their excellent adsorption and regeneration properties due to π complexation. However, existing preparation methods still suffer from the problems of a cumbersome process and low loading amounts of cuprous ions. Herein, we proposed a one-step synthesis strategy of using ethanol as a solvent to provide a reducing protective environment, which enabled the facile and controllable preparation of highly dispersed CuCl over 5A zeolites. Using CuCl as a copper source, to ensure the integrity of the 5A zeolite structure, CuCl species were directly loaded onto the 5A support in one step. Ethanol solution could effectively protect Cu(I) from being oxidized by oxygen in air and improve the stability of cuprous ions in Cu(I)/5A adsorbents. The results demonstrated that the Cu(I)/5A prepared by this method exhibited a superior CO adsorption performance to the pristine 5A zeolite. The adsorption capacity of CO over Cu(I)/5A attained 3.44 mmol·g–1 at 298 K and atmospheric pressure, which was evidently superior to those of CuY (2.7 mmol·g–1) and CuSAPO34 (1.84 mmol·g–1) reported in the literature, while the adsorption capacity of H2 was only 0.069 mmol·g–1 under the same condition. According to the ideal solution adsorption theoretical model, CO was preferentially adsorbed and the IAST selectivity of CO in the CO/H2 binary mixture over Cu(I)/5A was about 273.4. This study provides a novel and effective way to synthesize high-efficiency CO adsorbents.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yuan Lin,Qiao Zhang,Yuhang Li,Yunpeng Liu,Kejia Xu,Jiangnan Huang,Xiaosong Zhou,Feng Peng
An incompletely covered CdS/ZnS core/shell is synthesized via a simple hydrothermal method. Due to the defect energy levels introduced by zinc vacancies, the typical type-I heterojunction of CdS/ZnS evolves to a type-II heterojunction and Z-scheme hybrid structure so that the ZnS shell can timely transfer and capture the photogenerated holes from the CdS core. The surface photovoltage (SPV) distribution caused by photogenerated charges on the surface of catalyst is visually presented by Kelvin probe force microscopy with synchronous illumination (microscope SPV). It intuitively proves the effective spatial separation of photogenerated holes from the CdS core to the ZnS shell, for the first time. Under optimal conditions, the highest hydrogen production rate of CdS/ZnS reached 24.1 mmol g–1 h–1 under visible light illumination. The average apparent quantum yield of 9.3% can be achieved for 9 h of illumination (λ = 420 ± 5 nm). It exhibits highly efficient photocatalytic H2 evolution with well stability.
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高影响因子
Materials Today Chemistry
·
2026
·
IF 7.4
Yuewu Zhao,Yu Bai,Junkai Lang,Xiangling Gu,Jine Wang
The Fe-TCPP/MnOx MOF material with peroxidase (POD)-like and oxidase (OXD)-like activities was constructed, and it also has the ability to generate type I and type II dual-characteristic reactive oxygen species (ROS) under ultrasonic excitation. • The Fe-TCPP/MnOx exhibited dual enzyme-like activity, with the POD catalytic pathway being dominant, and its catalytic behavior conformed to the Michaelis-Menten kinetic model. • Under ultrasonic stimulation, this material significantly promoted the generation of ROS, capable of producing type I superoxide anion (O2. •- ) radicals and type II singlet oxygen ( 1 O 2 ). • By introducing Fe-TCPP/MnOx MOF into the polyvinyl alcohol-chitosan (PVA-CS) matrix, a hydrogel with excellent adhesion, self-repairing properties, and outstanding mechanical properties can be obtained. • Based on the antibacterial and moisturizing properties of PVA-CS-Fe-TCPP/MnOx hydrogel, it displayed good preservation ability for fruits such as blueberries and strawberries, reduced spoilage and weight loss, and effectively extended the storage time. Metal-organic frameworks (MOF) have exhibited broad application prospects in food preservation, antibacterial packaging, biomedical materials and other fields in recent years due to their high specific surface area, tunable pore structure and abundant active sites. In this study, a Fe-TCPP/MnOx MOF material with peroxidase (POD)-like and oxidase (OXD)-like activities was constructed, and it also has the ability to generate type I and type II dual-characteristic reactive oxygen species (ROS) under ultrasonic excitation. The TMB colorimetric experiment indicated that Fe-TCPP/MnOx exhibited dual enzyme-like activity, with the POD catalytic pathway being dominant, and its catalytic behavior conformed to the Michaelis-Menten kinetic model. Under ultrasonic stimulation, this material significantly promoted the generation of ROS, capable of producing type I superoxide anion (O 2 •- ) radicals and type II singlet oxygen ( 1 O 2 ). By introducing Fe-TCPP/MnOx MOF into the polyvinyl alcohol-chitosan (PVA-CS) matrix, a hydrogel with excellent adhesion, self-repairing properties, and outstanding mechanical properties can be obtained. This hydrogel also exhibited strong antibacterial properties, capable of effectively inhibiting the growth of Escherichia coli and Staphylococcus aureus . Based on the antibacterial and moisturizing properties of PVA-CS-Fe-TCPP/MnOx hydrogel, it displayed good preservation ability for fruits such as blueberries and strawberries, reduced spoilage and weight loss, and effectively extended the storage time. In summary, this study designed a multifunctional and performance-characterized MOF material, which not only has dual enzyme activities and dual-type ROS production capabilities, but also can be effectively embedded in other composite structures to generate various applications such as enzyme catalysis, antibacterial and preservation.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Junge Zhang,Yuan Ding,Xianggang Ma,Yingliang Liu,Li Zhang,Kunlun Wang,Shaokui Cao,Shengang Xu
The rapid recombination of photogenerated carriers and the narrow absorption range of visible light greatly limit the photocatalytic activity of graphite carbon nitride (g-C 3 N 4 ). Herein, g-C 3 N 4 was jointly modified by carbon dots (CDs) and copolymerization via in situ co-calcining of three precursors (urea, glucose and 2-amino-5-iodo-benzonitrile (I-ABN)), and named as I-ABN x -C 3 N 4 @CDs y . Then, solid-state Z-scheme photocatalysts PC1–PC9 with CDs as the electron mediators were prepared via in situ growth of BiOI on the surface of I-ABN x -C 3 N 4 @CDs y through solvothermal method. The optimal proportion of each component was explored through orthogonal experiments. The existence of CDs act as an electron transport medium to accelerate the transportation rate of photogenerated carriers, improve the light absorption capacity. The copolymerization with I-ABN introduce benzene rings and I − to g-C 3 N 4 , which enhance the light absorption capacity and photoelectric efficiency. The Z-scheme heterojunction effectively suppresses the recombination of photogenerated electron–hole pairs. Therefore, PC1–PC9 presented excellent performance for the degradation of BPA due to the synergistic effects of the above three points. Among them, PC6 showed the best photocatalytic activity, which completely degraded BPA (15 mg/L) within 40 min, and whose rate constant (0.091 min −1 ) was 22.8 times that of bulk g-C 3 N 4 . The active radical trapping experiment determined •O 2 − and h + were the main active radicals. Finally, the BPA degradation mechanism by PC6 was proposed. This study provides new insights for the combination of heterojunction, carbon dots, and copolymerization to rationally design efficient photocatalysts to restore the environment.
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高影响因子
Nano Energy
·
2018
·
IF 13.12
Junjie He,Yuren Xiang,Fan Zhang,Jiarong Lian,Rui Hu,Pengju Zeng,Jun Song,Junle Qu
Inorganic NiO is a promising hole extracting material for p-i-n planar perovskite solar cells due to its low cost, ultra-high photo and thermal-stability, and high energy level of conduction band blocking photoelectron from perovskite to cathode to prevent charge recombination at the interface. However, the power conversion efficiency (PCE) of NiO-based p-i-n devices is still lower than TiO 2 based n-i-p devices because of relatively low light harvesting ability in the red light region and the low work function of NiO limited the improvement of open circuit voltage. In this study, a novel surface modification method was developed for NiO-based p-i-n planar devices, which enhanced red light harvesting ability and device open voltage. It proved that all three functional groups of surface modifier played key role to boost the device performance. Detailed investigations show an increased interface contact between perovskite and hole transport layer improving charge extraction, preferential orientation of perovskite crystal that insures external quantum efficiency higher than 90% in the whole visible light range and even up to 95% in short wavelength region. The surface treatment improves the short circuit current density from 20 to 23.6 mA cm -2 and open voltage from 1.06 to 1.12 V.
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高影响因子
危险品化学品经营许可证（带存储）