SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Fangfang Du,Gan Li,Xiaojuan Gong,Guo Zhonghui,Shaomin Shuang,Ming Xian,Chuan Dong
We rapidly synthesized N,P-dual-doped carbon dots (N,P-CDs) via the acid-base neutralization spontaneous heat using a simple blend of phthalic acid, 1,2-ethylenediamine, and concentrated phosphoric acid. The approach is automatic without external heat treatment to speedily produce dozens of N,P-CDs, which refrain high temperature, sophisticated manipulations, and long reaction times. As-fabricated N,P-CDs with excellent luminescent properties, superior biocompatibility and respectable fluorescence quantum yield (QY) of 15% have been employed for the development of a label-free multifunctional fluorescence sensing platform for the detection of Mn(VII), temperature sensing and cellular imaging. Mn(VII) is able to effectively quench the fluorescence of N,P-CDs based on inner filter effect (IFE) because the absorption bands of Mn(VII) can perfectly overlap the emission and excitation wavelengths of N,P-CDs. The system had high selectivity toward Mn(VII) and the detection limit was 48.3 nM in the broad linear span from 10 μM to 200μM. Moreover, the N,P-CDs were extended for sensing Mn(VII) in living cell due to favorable biocompatibility and negligible cytotoxicity. Furthermore, the sensors showed a linear and reversible variation of emission intensity for a temperature range from 25℃ to 80℃, with a sensitivity of −1.79% per ℃. The practical implications of N,P-CDs for Mn(VII) detection have been demonstrated in Teas leaves and Medicinal herbs samples with satisfactory results.
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 35
·21758-21767
·
IF 3.108
Yali Bai,Zhenhuan Li,Bowen Cheng,Maliang Zhang,Kunmei Su
U–TiO2 is successfully coated with SiO2 and subsequently well modified by APTES, and the core–shell structure exists on TiO2@SiO2 and TiO2@SiO2/APTES, which greatly reduces aggregation of the TiO2 nanoparticles. The photocatalytic activities of U–TiO2, TiO2@SiO2, and TiO2@SiO2/APTES are evaluated using MB decomposition. Nearly 50% of the MB is degraded after 15 min in the presence of the U–TiO2 under UV radiation (300 W), and only 17.44% and 4.18% of the MB is degraded in the presence of the TiO2@SiO2-0.6 and TiO2@SiO2/APTES-1. However, TiO2@SiO2/APTES-0.6 and TiO2@SiO2-0.2 exhibit excellent UV absorbance capacities, and the TiO2@SiO2/APTES-0.6 achieves 80% of the UV-shielding ability of U–TiO2. Poly(p-phenylene sulfide) (PPS) is an easily photodegraded material and TiO2/PPS is more seriously photodegraded than PPS, however, the TiO2@SiO2/APTES nanoparticles can effectively protect the PPS from UV degradation, owing to their lower photocatalytic activities, higher UV-shielding abilities and easy dispersion in the PPS matrix. The breaking strength retention rate of the 1 wt% TiO2@SiO2/APTES/PPS film shows a maximum increase of 38.26%, and the breaking elongation retention rate increased by 41.64% at 2 wt% TiO2@SiO2/APTES loading. These results reveal that the incorporation of the TiO2@SiO2/APTES nanoparticles into the PPS matrix imparts excellent anti-UV properties to the PPS matrix, leading to a mechanical performance improvement.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 36
·12213-12223
·
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
Nanoscale
·
2019
·Vol. 11
·期 18
·8967-8977
·
IF 6.97
Li Li,Rui Zhao,Tinghua Xu,Dandan Wang,Du Pan,Kun Zhang,Caiyan Yu,Xia Lu,Guanjie He,Ying Bai
LiNi0.5Mn1.5O4 (LNMO) spinel has drawn increasing attention due to its high voltage, stabilized electrochemical performance and safety features as a cathode for lithium-ion batteries. However, the main challenge lies in its unstable surface structure, especially at elevated temperatures. In this paper, we decorate the LNMO precursor with a solid electrolyte of Li1.4Al0.4Ti1.6(PO4)3 (LATP) via a facile sol–gel method, followed by a co-crystallization process at 820 °C, to successfully generate a LATP modification shell at the surface of LNMO. The LATP modification shell could not only optimize the morphology of LNMO including the limitation of particle growth and control of crystalline orientation, but also realize ion doping during the co-crystallization process. By tuning the LATP contents, the 2 wt% LATP modification is found to be the most effective at balancing the interfacial stability and Li+ diffusion kinetics of LNMO, as well as enhancing its rate capability and capacity retention at high temperatures. As a result, the 2 wt% LATP-modified LNMO cathode exhibits a high reversible capacity of 84.8 mA h g−1 after 500 cycles with a capacity retention of 68.9%, and a superior rate capability (102.0 mA h g−1 at 20 C) at room temperature. Moreover, this electrode also delivers a good capacity retention of 85.7% after 100 cycles at 55 °C, which is ascribed to the stabilized interface with a LATP protective layer.
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PubMed
高影响因子
Advanced Sustainable Systems
·
2021
·Vol. 6
·期 1
·2100191
·
IF 6.271
Yongqi Deng,Hongfei Wang,Kefu Zhang,Jun Qiu,Lifeng Yan
Aqueous zinc ion hybrid supercapacitors (ZHSCs) have attracted considerable attention owing to the bivalent nature, high abundance, and stability in the water-based system of zinc. High energy density and superb power output can be achieved simultaneously by integrating a battery-type electrode and a capacitive-type electrode. However, there are still many issues that remain, including but not only hydrogen evolution reaction, dendrite growth, and dramatic capacity loss at low temperatures. Herein, a new type of hybrid “water-in-salt” hydrogel electrolyte based on 1 m Zn(CH 3 COO) 2 and 20 m CH 3 COOK to expand the voltage window of ZHSCs to 0–2.1 V by suppressing the decomposition of water molecules is developed. The aqueous ZHSC delivers maximum energy of 100.2 Wh kg −1 at a power density of 487.5 W kg −1 based on the active materials and displays excellent cycling stability with 99.5% capacitance retention after 4000 cycles. Meanwhile, it is found that the assembled flexible quasi-solid-state ZHSC using the potassium polyacrylate/sodium carboxymethyl cellulose hydrogel electrolyte (containing 1 m Zn(CH 3 COO) 2 and 20 m CH 3 COOK) also shows high-performance (energy density of 106.5 Wh kg −1 at a power density of 383.3 W kg −1 ) with temperature adaptability at low temperature and wearable application potential with excellent energy storage performance.
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高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Boyang Zhang,Kaiwei Liu,Yao Xiang,Jiaming Wang,Wenrui Lin,Mei Guo,Guijun Ma
Photo-electrochemical (PEC) and photocatalytic (PC) water splitting are promising solutions to achieve solar-powered hydrogen production. In the present work, to integrate the merits of PEC and PC techniques, a p–n conjugated two-electrode water-splitting system was miniaturized into one particle (denoted as electrode particle) for PC reactions. Specifically, a p-type Rh-doped strontium titanate (Rh:SrTiO3) photocathode material was selectively deposited on the electron-accumulated facet of a particulate n-type Mo-doped bismuth vanadate (Mo:BiVO4) photoanode with inserting a partly oxidized In@InOx interlayer as a grain binder and charge conductor. The photoexcited charge migration and accumulation were visualized through light-assisted Kelvin probe force microscopy. Benefited from efficient interfacial charge transfer and effective surface modification, visible light-driven PC overall water splitting into H2 and O2 was achieved over the prepared Mo:BiVO4/In@InOx/Rh:SrTiO3 electrode particle with an intense-light stability up to 40 h, an ambient pressure endurability from 5 to 95 kPa, and a solar-to-hydrogen energy conversion efficiency of 1.2 × 10–2%. This work develops a strategy of designing an efficient composite photocatalyst for PC overall water splitting and provides insights toward the enhancement of charge transfer efficiency across hetero-semiconductors.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huiqi Gao,Haiyun Ma,Jinjin Cui,Xusheng Ge,Jiajun Tan,Jianzhong Xu
Organic phase change materials (PCMs) suffer from liquid-phase leakage, insufficient solar-thermal conversion capability, inherent flammability, which severely hinders their utilization. Herein, we design a three-dimensional hierarchically porous aerogel composite PCMs that integrates hollow phosphorus-doped ZIF-8 microshells (P-ZIF-8) with chitosan (CS) and MXene nanosheets for multifunctional synergy. Specifically, the hierarchically porous aerogel exhibits exceptional mechanical strength (withstanding >5000 times its own weight), endowing the composite PCMs with superior shape stability. This hierarchical framework, comprising aerogel network and hollow P-ZIF-8 microshells, provides a dual encapsulation effect and achieves outstanding encapsulation capability (97.6 %) and latent heat storage density (190.0 J/g), maintaining thermal durability and stability over 200 heating-cooling cycles. The MXene and P-ZIF-8 microshells synergistically enhance solar-thermal harvesting and energy conversion in composite PCMs, achieving a solar-thermal conversion efficiency of 98.3 % and outputting 442.1 mV and 69.1 mA in a solar-thermal-electric generator under 500 mW/cm 2 . The P-ZIF-8 microshells and MXene both provide physical barriers and catalytic charring effect, markedly enhancing the flame retardancy of the composite PCMs with peak heat release rate (pHRR) and total heat release (THR) significantly reduced by 31.1 % and 17.1 %, respectively. This work offers a versatile pathway for multifunctional PCMs that simultaneously meet the needs of thermal energy storage, solar harvesting and fire safety.
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产品关联
DOI
高影响因子
Frontiers in Microbiology
·
2025
·
IF 4.5
Yuanyang Yi,Yuxian Wang,Wanqin Liu,Jing Zhu,Meiying Gu,Qiong Jia,Xue Li,Munire Mutalifu,Ling Jiang,Wei Zhang,Zhidong Zhang
Introduction: Di-n-butyl phthalate (DBP) is one of the most widely used phthalate esters (PAEs) and is considered an emerging global pollutant. It may pose a significant threat to ecosystem and human health due to its residual hazards and accumulation in the environment. Bacteria-driven PAE biodegradation is considered an economical and effective strategy for remediating such polluted environments.Methods: A DBP-degrading bacterium (P-7), was isolated from long-term film mulched cotton field soil. Its identity was confirmed via physiological, biochemical, and 16S rRNA gene analyses. The degradation conditions were optimized through single-factor experiments and response surface methodology (RSM).Furthermore, the whole-genome sequencing coupled with metabolomics was employed to elucidate metabolic mechanisms.Results: Priestia megaterium P-7 (P. megaterium P-7) achieved 100% DBP removal within 20 h under optimal conditions and exhibited broad substrate specificity for other PAEs. Genomic analysis identified key genes (lip, aes, ybfF, estA, and yvaK) encoding esterases/hydrolases that initiate DBP catabolism, converting it to phthalic acid (PA). Subsequent decarboxylation (pdc, bsdCD, mdcACDH, and lysA) and dioxygenase-mediated steps integrated PA into the TCA cycle. Metabolomics revealed three degradation pathways: decarboxylation (DBP → MBP → BB → BA→Catechol), hydrolysis (DBP → MBP → PA → PCA → Catechol) and direct β-oxidation (DBP → DEP → MEP → PA → Catechol).Conclusion: P. megaterium P-7 demonstrates exceptional degradation efficiency, substrate versatility, and environmental stress tolerance, making it a promising candidate for bioremediation of organic pollutants in contaminated soil.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yan Sang,Xi Cao,Guangdong Dai,Lvxuan Wang,Yin Peng,Baoyou Geng
The construction of heterojunction system can promote the separation and transfer of photogenerated electron-hole pairs, which is conducive to the degradation of sewage. In this paper, heterostructured Bi 2 O 3 /Bi 2 S 3 nanoflowers are fabricated by a one-step hydrothermal method. The microstructure and optical absorption properties are studied through the detailed characterization of this heterojunction. The visible light photocatalytic ability of as-prepared Bi 2 O 3 /Bi 2 S 3 heterojunctions are investigated by photocatalytic removals of RhB and Cr(VI). The results of photocatalysis indicate that removal efficiencies of RhB and Cr(VI) over Bi 2 O 3 /Bi 2 S 3 heterojunction are higher than those of pure Bi 2 O 3 and Bi 2 S 3 . The improved photocatalytic performance of the Bi 2 O 3 /Bi 2 S 3 heterojunctions could be attributed to a combination of the p-n junction between the p-type Bi 2 S 3 and n-type Bi 2 O 3 , and large specific surface areas (46.31 m 2 g −1 ). Moreover, the probable photocatalytic mechanism of composite photocatalysts is explored in detail by active species trapping experiments, N 2 adsorption–desorption, the transient photovoltage electrochemical impedance spectroscopy and photoluminescence measurements. This work provides new insights into building of the efficient and novel heterogeneous photocatalysts and other energy-related devices.
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高影响因子
Small
·
2018
·Vol. 14
·期 12
·1703453
·
IF 9.598
Caiyan Gao,Guangming Chen
Although composites of organic polymers or n-type small molecule/carbon nanotube (CNT) have achieved significant advances in thermoelectric (TE) applications, p-type TE composites of small organic molecules as thick surface coating layers on the surfaces of inorganic nanoparticles still remain a great challenge. Taking advantage of in situ oxidation reaction of thieno[3,4-b]pyrazine (TP) into TP di- N -oxide (TPNO) on single-walled CNT (SWCNT) surface, a novel synthesis strategy is proposed to achieve flexible films of TE composites with narrow-bandgap (1.19 eV) small molecule coating on SWCNT surface. The TE performance can be effectively enhanced and conveniently tuned by poly(sodium- p -styrenesulfonate) content, TPNO/SWCNT mass ratio, and posttreatment by various polar solvents. The maximum of the composite power factor at room temperature is 29.4 ± 1.0 µW m −1 K −2 . The work presents a way to achieve flexible films of p-type small organic molecule/inorganic composites with clear surface coating morphology for TE application.
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高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 14
·4476-4490
·
IF 4.174
Keyu Tao,Lian Wang,Yang Hai,Yun Gong
P–TiOn–VOm nanowires were grown on nickel foam (NF) via a one-pot hydrothermal method and by further vapor deposition/phosphorization method. It was found that low valence states of titanium oxide and deficient-oxygen coexist in P–TiOn–VOm/NF. Furthermore, (TiO1.25)3.07 (denoted as TiOn) and VO (denoted as VOm) possess similar structures and matched facets, and their epitaxial growth leads to the formation of TiOn/VOm heterostructure with a formation energy of −1.59 eV. P–TiOn–VOm/NF possesses good electron conductivity and electrons can be transferred from Ti to V centers, as evidenced by the DFT calculations and the XPS spectra. As a result, the specific capacity of P–TiOn–VOm/NF can reach 785 C g−1 at 1 A g−1 in the potential range of 0–0.55 V vs. Hg/HgO, which is much larger than those of VOm/NF, P–VOm/NF, and P–TiO2–VOm/NF. On the other hand, the TiOn/VOm heterostructure also favors the separation and transfer of photoinduced electrons and holes, and P–TiOn–VOm/NF exhibits visible-light-driven photoresponse. Under visible light illumination, the specific capacity of P–TiOn–VOm/NF is increased by 6.2% relative to that in the dark. Furthermore, the P–TiOn–VOm/NF//activated carbon (AC) asymmetric supercapacitor (ASC) shows an energy density of 37.2 W h kg−1 at a power density of 1 kW kg−1 and excellent cycling performance with 93.6% capacity retention after 10 000 cycles at 5 A g−1, which is comparable to and even superior to those of titanium oxides and vanadium oxides. A promising achievement has been proposed to improve the energy storage performance of P–TiOn–VOm through P-functionalization and O-deficiency in this work.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 28
·14254-14264
·
IF 11.301
Qipeng Cai,Jie Mao,Yuntong Li,Jun Liu,Hong Zhang,Junwen Huang,Tong Wu,Yuxin Yang,Conghui Yuan,Lizong Dai
In this work, utilizing a dynamic imine exchange, we develop a selective etching strategy to construct porous polymer nanosphere precursors, which can be subsequently carbonized into hierarchical porous carbon nanospheres (PCNPs) co-doped with both N and P elements. Our strategy to construct polymer precursors is simple, suitable to various aldehyde and amino building blocks and easy to incorporate heteroatoms into the carbon matrix. Importantly, by simply adjusting the concentration of the etching agent, PCNPs with micro- and meso-pores or even hollow structures can be controllably fabricated. The as-prepared PCNPs exhibit excellent electrochemical performance with the highest specific capacitances of 359.5 F g−1 at 0.5 A g−1 and 224.0 F g−1 at 20 A g−1 under acidic conditions (1 M H2SO4). The cycling stability of the PCNPs is also attractive, with a capacitance retention of ∼95% after 5000 cycles. Semi-solid-state supercapacitors assembled using PCNPs as electrodes and H2SO4/PVA as a gel electrolyte exhibit specific capacitances up to 226.7 F g−1 at 0.2 A g−1 and 126.0 F g−1 at 20 A g−1.
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高影响因子
危险品化学品经营许可证（带存储）