MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-11
·
IF 5.7
Li Yangguang,Yang Qiaoran,Feng Yifan,Ye Bang-Ce
For practical analysis and simultaneous detection of arbutin (AR) and hydrochinone (HQ) in cosmetics, an electrochemical sensor has been designed based on nitrogen and sulfur co-doped Fe–Ni alloy (N,S-FeNi 3 /C) nanoparticles. The N,S-FeNi 3 /C has been prepared for the first time via hydrothermal synthesis and high-temperature carbonization. N,S-FeNi 3 /C not only improves the charge transfer to the surface, but also provides rich active sites and fast ion diffusion rates owing to the iron and nickel bimetallic materials. In addition, the d-band structure of transition metals (nickel and iron) introduced by the N and S atoms exhibits an electronic structure similar to that of noble metal catalysts, thus enhancing electrocatalytic activity and increasing conductivity. Additionally, the double doping of S and N atoms significantly increases the active sites of carbon atoms; thus, N-S-FeNi3/C exhibits excellent electrochemical catalytic activity for the oxidation of AR and HQ. Further, the N,S-FeNi 3 /C sensor is used for the simultaneous determination of HQ and AR by square-wave pulse voltammetry. Distinct oxidation peaks of HQ and AR are observed at potentials of +0.028 V and +0.352 V (vs. SCE). The electrical signal increases linearly in the HQ concentration ranges of 0.1–100 μM and 0.05–70 μM for the simultaneous determination of AR and HQ with a detection limit as low as 0.0476 and 0.0135 μM (S/N = 3), respectively. Thus, rapid and accurate detection of AR and HQ in spiked cosmetics is successfully achieved, with a recovery ranging from 96.4 to 104.2%, and the relative standard deviation is lower than 3.8–4.0%. Graphical Abstract
研究领域:
分析化学
·
材料科学
·
化妆品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Xianju Zhou,Qianyang Chang,Guotao Xiang,Sha Jiang,Li Li,Xiao Tang,Faling Ling,Yongjie Wang,Jingfang Li,Zhen Wang,Xuecong Zhang
Light-emitting perovskite quantum dots (PeQDs) are extensively investigated owing to their evident merits. However, it is still a challenge to adjust their intrinsic emissions and enhance their thermal stability to achieve full-color highly emissive QD-based light-emitting diodes (QLEDs), especially blue QLEDs. Herein, we demonstrate an effective strategy to fundamentally stabilize the crystal structure of CsPbBr 3 QDs by codoping Na + and Cu 2+ ions, which are designed to substitute Cs + (A sites) and Pb 2+ (B sites), respectively. It is found out that the codoping metal ions have significantly improved the thermal stability and the optical properties of the QDs. 40% of the emission intensity can be remained after 8 thermal cycles (20–120 °C) for CsPbBr 3 : Na + /Cu 2+ QDs, whilst less than 10% is maintained for undoped CsPbBr 3 QDs. Accordingly, stable blue QLEDs are packed by CsPbBr 3 : Na + /Cu 2+ QDs. Strong electroluminescence with the maximum luminance of 7161 cd m −2 and low turn-on voltage of 2.4 V are realized. The CIE coordinates are tuned from green (0.10, 0.74) to blue (0.17, 0.25) via Na + and Cu 2+ codoping. The maximum external quantum efficiency (EQE max ) is obtained as 4.52% for PeLEDs based on codoped QDs. The proposed metal ions A and B sites dual substitution strategy guarantees PeQDs as an extremely promising prospect in potential applications as high-resolution displays and high-quality lightings.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Junyang Ding,Zimo Peng,Zhiwei Wang,Chunhui Zeng,Yanhong Feng,Miaosen Yang,Guagnzhi Hu,Jun Luo,Xijun Liu
Although it is more cost-effective, producing hydrogen through acidic seawater splitting systems is still difficult, especially when it comes to creating highly effective, highly resistant chlorine corrosion bifunctional catalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, under the addition of phosphotungstic acid and the etching effect of oxalic acid, we develop bifunctional P/W dual-doped RuOx nanocrystals for acidic overall seawater splitting, showing overpotentials of 45 and 158 mV for the HER and OER at 10 mA cm−2, respectively, and accompanied by a strong corrosion resistance towards seawater. Accordingly, the two-electrode system requires only 1.47 V to reach a current density of 10 mA cm−2 and maintains a high stability over 50 h. The P/W dual doping modulates the electrical environment of Ru sites, and the addition of oxalic acid encourages the exposure of more active sites, both of which contribute to the enhancement of seawater electrolysis. Theoretical calculations further manifest that the energy barriers of the HER and OER can be lowered by the dual-doping. Moreover, we found a positive influence of Cl− on the catalytic activity of acidic seawater splitting. Our work offers a promising strategy to significantly increase the catalytic efficiency of Ru-based catalysts for the generation of green hydrogen from acidic seawater in a sustainable manner.
研究领域:
材料科学
·
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Juan Ren,Yibei Zhou,Meichen Guo,Qiaoji Zheng,Dunmin Lin
Lithium-sulfur (Li-S) batteries exhibit great potential for next-generation high energy density energy storage. However, the insulativity of sulfur and the “shuttle effect” of polysulfides result in low utilization efficiency of active sulfur, fast capacity decay and inferior cycling stability, which pose the key challenge to their practical applications. Herein, a N, I-dual-doped hierarchical porous activated carbon (NIWFC) is successfully prepared for advanced Li-S batteries by the simple one-pot pyrolysis and hydrothermal processes. The obtained NIWFC owns interconnected porous framework with desirable specific surface area (2088.56 m 2 g −1 ) and large volume space (1.106 cm 3 g −1 ), which can accommodate high content of active sulfur and immobilize polysulfides through physical confinement. Moreover, the existence of N and I heteroatoms could effectively strengthen the chemical adsorption to polysulfides and create more active sites to enhance sulfur utilization. Attributed to these merits, impregnating sulfur into NIWFC (NIWFC/S) as cathode of Li-S batteries achieves a high initial discharge capacity of 1284.1 mAh g −1 at 0.1 C (remaining at 916.7 mAh g −1 after 100 cycles) and the outstanding cycling stability with a low capacity fading rate of 0.061% per cycle over 350 cycles at 1.0 C. This work provides a facile and cost-effective strategy to design a novel sustainable N, I-dual-doped porous carbon for high performance Li-S batteries and various energy storage fields.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 8
·1645-1650
·
IF 5.066
Jian Lin,Le Wang,Qian Zhang,Fei Bu,Tao Wu,Xianhui Bu,Pingyun Feng
Chemically co-doping a micron-sized semiconductor single crystal while simultaneously segregating different dopant types uniformly on a nanoscale is synthetically challenging, but often essential for preventing unwanted dopant-related interference that may hamper optic and magnetic applications. Here by starting from a unique molecular crystal composed of well-defined discrete supertetrahedral chalcogenide nanoclusters (NCs), we successfully realized highly effective nanosegregation of dual dopants (Cu and Mn) in Cd–In–S semiconductor crystals. Our method takes advantage of the intrinsic single vacancy at the core of NC that permits the trapping of only one dopant ion. Such single-ion trapping effectively precludes two dopant ions from residing in the same NC, allowing us to target single-crystal white-light emitter by eliminating possible interference between dopants. This new method for controlling the distribution of multiple dopants on a nanoscale provides a promising route to modify and tune optical and magnetic properties of large-sized semiconductor single crystals for use in integrated multifunctional devices.
研究领域:
材料科学
·
光学
·
化学合成
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Junyu Gao,Hongqin Ma,Xinyue Luo,Luqi Yu,Xingpeng Gu,Jiahao Liu
Rational design of low-cost and highly-efficient electrocatalysts is vital for water electrolysis. To date, many works have proved that the electrocatalytic hydrogen evolution reaction (HER) activity of the transition metal chalcogenides (TMCs) can be enhanced by anion or cation doping. However, the effect of anion-cation dual-doping on improving the HER activity of TMCs catalysts is still questionable. Herein, we designed and synthesized a porous (Mo, N)-NiSe 2 /Nickel foam (NF) nanosheets array by simultaneous doping Mo and N into pyrite-type NiSe 2 . For (Mo, N)-NiSe 2 /NF, the incorporation of Mo could significantly increase the specific surface area and active sites of NiSe 2 catalyst, whereas N doping was primarily responsible for accelerating the intrinsic reaction kinetics as well as introducing new reactive sites of catalyst. As a result, the porous (Mo, N)-NiSe 2 /NF nanosheets array exhibited a low overpotential of 82 mV at 10 mA.cm −2 , a small Tafel slope of 84.5 mV.dec −1 , and a high C dl of 90.5 mF.cm −2 for HER. Furthermore, the results of “post-HER” XRD , HR-TEM, SEM and XPS demonstrated that the structure, composition and morphology of (Mo, N)-NiSe 2 /NF remained unchanged after 35 h constant current test. This work highlighted the importance of anion-cation dual-doping in boosting electrocatalytic HER activity of TMCs catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Lili Guo,Jingqi Chi,Jiawei Zhu,Tong Cui,Jianping Lai,Lei Wang
Seawater electrolysis is an efficient method for producing carbon-neutral hydrogen; however, it is hindered by high energy cost and chlorine evolution reaction. In this study, we report Ru, P dual-doped NiMoO 4 multichannel nanorods in-situ grown on nickel foam (Ru/P-NiMoO 4 @NF), which can achieve chlorine-free hydrogen production by coupling seawater splitting with thermodynamically favorable urea oxidation . The Ru/P-NiMoO 4 @NF exhibits bifunctional activity with working potentials of 0.23 V to deliver 3000 mA cm −2 for HER and 1.46 V to deliver 1000 mA cm −2 for UOR. The overall urea splitting system in the two-electrode electrolyzer require low voltage of 1.73 V to drive 500 mA cm −2 , and demonstrate remarkable durability to keep above 100 mA cm −2 for 145 h. Density functional theory calculations reveal that dual-doping modulate the d -band center of catalyst, thus enhancing the adsorption of reactants and intermediates. This work provides information for designing catalysts for combing seawater splitting with urea purification.
研究领域:
材料科学
·
电催化
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 19
·5686-5693
·
IF 7
Hongjing Wang,Yuqin Liang,Songliang Liu,Xu Mu,Hongjie Yu,Kai Deng,Ziqiang Wang,You Xu,Liang Wang
Coupling the thermodynamically favorable sulfion oxidation reaction (SOR) with the hydrogen evolution reaction (HER) is a promising approach to simultaneously save energy and cost-effectively produce high value-added chemicals and hydrogen. The construction of efficient bifunctional catalysts for SOR–HER electrocatalysis is of significance yet challenging. Here, we propose a dual-nonmetal-doping strategy to construct S and P dual-doped Rh metallene (SP-Rhlene). Benefiting from the combined advantages of dual heteroatom doping and an ultrathin nanosheet structure, SP-Rhlene with a large electrochemical active area and an optimized electronic structure exhibits outstanding HER and SOR activities. A two-electrode system based on optimized SP-Rhlene only needs a cell voltage of 0.385 V at 10 mA cm−2 to generate H2, while transforming S2− into sulfur powder, which further reduces the cost of hydrogen production and protects the ecological environment. This work provides a directive strategy for the rational construction of dual heteroatom doped metallene for energy-saving hydrogen production and environmentally friendly sulfur recovery.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Xiaodong Yang,Haochen Shen,Xiaoming Xiao,Wei Yang,Zhichao Li,Na Yang,Luhong Zhang
In this work, P and Mo dual-doped CoNiS (PMo-CoNiS) nanosheet arrays were successfully constructed through a common solvothermal treatment. The precise doping of P and Mo species into the CoNiS can regulate the microstructures and meanwhile endow with PMo-CoNiS abundant amorphous/crystalline heterointerfaces, which can adjust the electronic structure, thus enhancing the intrinsic activity of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a result, ultra-low overpotentials of merely 156 and 58 mV are required to deliver a current density of 10 mA cm −2 for OER and HER, respectively, and the electrocatalysts PMo-CoNiS also exhibit low Tafel slopes and maintain robust stability for 48 h in alkaline media at a high current density of 50 mA cm −2 . In addition, in an assembled electrolyte cell for overall water splitting, a voltage as low as 1.48 V is sufficient to yield a current density of 10 mA cm −2 . Density functional theory (DFT) calculations further confirmed that the enhanced OER and HER result from the optimized OH* and H* adsorption energy of PMo-CoNiS due to P, Mo dual doping and generated interfacial effect. This work may offer an avenue for designing low-cost bifunctional catalysts with superior catalytic activity and provide a new application strategy for broader applications in various electrocatalytic fields.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Guohua Zhu,Xiaoyan Zhang,Yongguang Liu,Fangbo Ma,Jing Suo,Ling Wang,Shan Liu
Layered oxide cathodes have attracted widespread attention due to their high-voltage and high discharge capacity. Nevertheless, the irreversible redox reactions of layered oxide cathode and decomposition of electrolyte at high-voltage greatly reduce the reversibility of the batteries. Herein, we employ a double-doping (Li&B) strategy to enhance the electrochemistry performance of the layered NaNi 0.3 Fe 0.3 Mn 0.4 O 2 (NNFM) cathode at high voltage. It proved that the dissolution of the transition metal can be restricted by double doping, and the irreversible phase transition is mitigated even at high voltage. As a result, battery with the double-doping cathode exhibits excellent electrochemistry performance, which achieves a capacity of 175 mAh g −1 at 0.2C, maintaining a capacity retention of approximately 87.3% over 100 cycles at 1C, and demonstrates exceptional rate performance. This work presents a novel insight into the doping technique for the high-performance cathode materials and offers a general method for the high energy Na-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jingting He,Kun Yang,Guisheng Qi,Zonglin Yi,Yujing Guo,Qiang Guo
Electrocatalytic nitrate reduction reaction (NO 3 RR) represents a promising approach for regulating the global nitrogen cycle and serves as a crucial complementary method for ammonia synthesis. However, NO 3 RR is a complex reduction process involving the transfer of eight electrons and nine protons. Therefore, it is difficult for catalysts with a single catalytic site to maintain an advantage throughout the NO 3 RR process. Consequently, the fabrication of catalysts with synergistic effects to achieve both high efficiency and selectivity remains a formidable challenge. Herein, a simple precipitation-calcination process was employed to successfully introduce boron (B) and nickel (Ni) elements into Co 3 O 4 (B/Ni-Co 3 O 4 ) simultaneously. Impressively, the as-prepared B/Ni-Co 3 O 4 catalyst exhibited a remarkable NH 3 yield of 17.2 mg·h −1 ·mg cat −1 and a high FE of 97.2 % at −0.5 V relative to the reversible hydrogen electrode (RHE). Density functional theory (DFT) computations uncovered a cooperative effect between B and Ni dopants, specifically: B doping exhibited appreciable efficacy in NO 3 – adsorption, and the Ni dopant showed notable activity in promoting the conversion of NO 2 − . Further DFT calculations identified the *NO → *NOH step as rate-determining and revealed that B-Ni co-doping diminishes its thermodynamic energy barrier. Concurrently, experimental measurements showed that such co-doping lowers the onset potential to −0.06 V vs. RHE. This dual doping strategy significantly accelerates the electroreduction of NO 3 − to NH 3 .
研究领域:
电化学
·
催化化学
·
材料科学
·
环境化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）