ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xuedong He,Yujian Zhang,Juan Wang,Jun Li,Lianghao Yu,Feng Zhou,Juan Li,Xiaojun Shen,Xin Wang,Shun Wang,Huile Jin
Metal compounds encapsulated in carbon materials exhibit promising properties as potential oxygen electrocatalysts. Herein, we first report Fe2N@C derived from the biomass bioaccumulation doping method, which offers a new perspective for exploring oxygen reduction reaction (ORR) electrocatalysts with low cost and high performance. The Fe2N@NCNTs prepared with our biodoping method display excellent ORR activity with a low half-wave potential (E1/2) and long-term stability in a broad pH range. More importantly, a zinc–air battery (ZAB) constructed with Fe2N@NCNTs’ catalysts exhibits a high open-circuit voltage (1.53 V), high peak power density (135 mW cm–2), and excellent stability (over 200 h). The significantly improved ORR performance can be attributed to the high N-doping level and its hierarchically porous structure. This work offers a path for the development of ORR catalysts for environmental governance and efficient energy conversion.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 5
·1258-1268
·
IF 4.912
Zhongqiang Zhao,Xin Cai,Xiaoyuan Yu,Hongqiang Wang,Qingyu Li,Yueping Fang
In recent years, the development of high-performance and practical silicon–carbon composite anode materials has attracted significant interest for the advancement of new-generation lithium-ion batteries. Herein, using zinc powder as a sacrificial reducing agent, novel core/shell structured silicon/reduced graphene oxide (Si/rGO) hybrids were fabricated via a facile mechanochemical route. In particular, rGO nanosheets were effectively bound to the surfaces of ball-milled silicon particles via an in situ reduction reaction by zinc without any extra surfactants or binders. The well-established rGO coating layer on silicon is crucial and confers electronic conductivity and mechanical integrity to the acquired Si/rGO composites. Owing to the conductive rGO shells, which provided good charge transport properties and also confined the volumetric expansion of active silicon cores upon cycling, the optimal porous Si/rGO composite anode could achieve enhanced reversible capacities and superior cycling stability. After 200 charging–discharging cycles at the current density of 200 mA g−1, the Si/rGO composite still retained the high discharge specific capacity of 767 mA h g−1, and 548 mA h g−1 was retained at 500 mA g−1 after 300 cycles. Moreover, the Si/rGO composite delivered excellent high rate capabilities and cycling durability. Due to its low-cost, environmental-friendliness and scalability, this novel zinc-assisted coating strategy offers an alternative way to produce cost-efficient anodes for rechargeable batteries.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Zijian Wang,Dongzhi Zhang,Mingcong Tang,Yajing Chen,Yuehang Sun,Qingdong Chen,Jingdu Bian,Xingyan Shao
Hydrogen (H 2 ) is considered one of the promising energy sources to replace fossil fuels so efficient H 2 sensing technology is a necessary condition to ensure the safety of people’s livelihood and economic development. In this paper, ZnO obtained by calcination of precursor ZIF-8 has a regular dodecahedral structure. The product of In 2 O 3 obtained with the participation of the surfactant PEO-PPO-PEO has two different crystal forms, namely cubic phase c-In 2 O 3 and hexagonal h-In 2 O 3 . Crystal form c-In 2 O 3 is 7.07 wt% of the mass of h-In 2 O 3 . When ZnO is 5 wt% of In 2 O 3 , the H 2 sensor based on the ZnO (5 %)-Inc/Inh composite material has the best response performance and the operating temperature is 450 °C. The sensor’s response time for detecting 5000 ppm H 2 is less than 1 s, and the recovery time is 6 s with a response intensity of 79.91. The limit of detection (LOD) is 53 ppb, which is much lower than the explosive concentration (4–75 V/V%). Density functional theory (DFT) is utilized for investigating the performance advantages of Inc/Inh composites over pure c-In 2 O 3 and h-In 2 O 3 and further elaborating the mechanism of ZnO improving the gas-sensing performance of ZnO (5 %)-Inc/Inh. The sensor based on ZnO (5 %)-Inc/Inh composite may guide the research of high-performance H 2 sensors. The H 2 adsorption mechanism of the sensor was analyzed based on the oxygen adsorption mechanism.
研究领域:
材料科学
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能源技术
·
纳米科技
✓ 已验证
DOI
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Chenglu Zhang,Shiru Nie,Chang Liu,Yang Zhang,Jinghao Guo
The fluorescent probe NXZ was synthesized by introducing –OH at position 1, 8-naphthalimide 4-position and benzimidazole unit at 3-position. The Stokes shift (λ em − λ ex ) of NXZ can up to 148 nm, when Zn 2+ was added to the probe solution, NXZ can quickly form the complex NXZ -Zn 2+ with Zn 2+ in a ratio of 1: 1 within 55 s, and then quench the fluorescence intensity by 4.4 times. The complexation constant of NXZ and Zn 2+ was 1.2 × 10 4 M −1 , and the detection limit for Zn 2+ was 40.3 nM, which is much lower than the maximum Zn 2+ content (76 µM) stipulated in the World Health Organization (WHO). Exploring the practical application of the probe NXZ found that NXZ can be used for the quantitative detection of Zn 2+ in actual water samples and qualitatively detect Zn 2+ in bean sprouts samples and Hela cells. In addition, NXZ can also be made into Zn 2+ test paper.
研究领域:
分析化学
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生物医学
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环境科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
M. Yousaf,Majid Niaz Akhtar,Baoyuan Wang,Asma Noor
Rare earths RE's (Pr, Y, Gd, Ho, Yb) substituted MnZn spinel ferrites with composition of Mn 0.5 Zn 0.5 M 0.02 Fe 1.98 O 4 (M = Pr, Y, Gd, Ho, Yb) are prepared by sol gel combustion approach. Low sintering temperature (500 °C) is used to sinter the RE's doped MnZn samples. MnZn samples are further characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) to measure the cubic crystalline structure, particle size, morphology, porosity and grain size. Cubic crystalline phase of prepared RE's doped MnZn ferrites is confirmed by x-ray diffraction (XRD). The morphology, porosity and grain size are observed using FESEM. The magnetic properties of RE's doped MnZn nanoferrites are analyzed by vibrating sample magnetometer (VSM). Coercivity (H c ), remanence (M r ) and saturation magnetization (M s ) are calculated from the magnetic loops. The saturation and remanence of the nanoferrites are increased by the substitution of RE's metal ions and varies from 14.76 to 26.36 emu/g and 9.98–22.48 emu/g respectively. Bohr magneton and anisotropy constant are calculated from the recorded magnetic data. The conductive analysis of the prepared samples is studied at 40 °C −300 °C temperature, leading to the conductivity measurements from 1.12 × 10 -2 Ω -1 -cm -1 to 9.52 × 10 -2 Ω -1 -cm -1 . UV–Vis spectroscopy is used to determine the semi conducting nature of RE's doped MnZn spinel ferrite samples. The magnetic, conductive and optical study of the RE's doped MnZn nanoferrites sintered at low temperature suggests the use of these materials for microwave absorption, supercapacitor , lithium ion batteries and nanoelectronics industrial applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xingyu Kang,Haibo Yu,Xiao Ma,Eryang Shang,Hong Chen,Huizhang Zhao,Jiawei Zhang,Rong Tan,Dong Wang,Hairui Fang
An efficient portable gas sensor was developed to meet the needs of air quality monitoring, for the detection of nitrogen dioxide (NO 2 ). In this study, coaxial electrospinning technology was used to synthesize porous nanofibers of indium oxide (In 2 O 3 ) composite zinc oxide (ZnO), which are recognized as special semiconductor ceramic materials. The best sample (NFs.1–6) consists of a nanoparticle-based structure with interconnected pores, in contrast to the more compact, tightly bonded nanofibers. This porous structure enhances gas adsorption capacity, improving the sensor’s performance. At 200 °C, the synthesized In 2 O 3 @ZnO (NFs.1–6) nanofibers exhibited a high response value of 171.25 and a fast response time of 5 s to 100 parts per million (ppm) NO 2 . The excellent characteristic is attributed to its uniform structure and n-n homojunction, making the response values 38 times and 98 times that of pure ZnO and pure In 2 O 3 , respectively. Building on the research findings, a smart mask was developed that incorporates the nanofiber sensor to monitor NO 2 concentrations in the air, offering an innovative approach to wearable gas sensor technology by semiconductor ceramic materials.
研究领域:
材料科学
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环境科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2022
·Vol. 32
·期 5
·1365-1376
·
IF 3.117
Xu Yuxuan,Tu Chuanjun,Liu Yanli,Liu Ping,Chen Gang,Tan Jiao,Xiong Wei,He Yubo,Liang Shilin,Ma Qingchun
High-temperature friction performances of graphite blocks (GBs) and zinc phosphate impregnated graphite blocks (IGBs) were evaluated under various friction temperatures. The surface of IGB exhibited extremely lower average friction coefficient values, that was 0.007 at 400 °C and 0.008 at 450 °C, in comparison to that of GB (0.13 at 400 °C and 0.16 at 450 °C, respectively). The worn surface of IGB in the high-temperature friction test was smoother and more complete than that of GB. The wear under high temperature and load caused the transformation of zinc pyrophosphate to zinc metaphosphate and the formation of a continuous large-area boundary lubrication layer combined with graphite and metallic element on the wear surface. The superior tribology property of IGB could be attributed to the digestion of iron oxides by tribo-chemical reactions and passivation of the exposed dangling covalent bonds. Specifically, the layered structure generated on the IGB wear interface effectively decreased the adhesive forces and prevented the surface from serious damage.
研究领域:
材料科学
·
摩擦学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Dandan Liu,Xueyan Li,You Li,Shu Yin,Jiajia Liu,Jiatao Zhang
Highly sensitive and selective gas sensors hold great potential in disease diagnosis. However, the rational design of non-noble-metal-based, high-efficiency sensing materials for trace gas detection remains a crucial challenge. Herein, a chemiresistive sensor that can detect parts per billion (ppb)-level acetone was realized based on three-dimensional (3D) α-Fe2O3/ZnO nanocages, which were achieved by a simple encapsulation and calcination process. In particular, we found that Fe species play an intriguing role in the evolution from Fe-ZIF-8 to heterogeneous α-Fe2O3/ZnO nanocages. α-Fe2O3 functionalization empowered the α-Fe2O3/ZnO nanocage-based sensor with a high response of 45.25, an ultrafast response (7 s) and recovery (6 s) time toward 50 ppm of acetone, a limit of detection (LOD) of 500 ppb, and superior selectivity. Moreover, in situ Fourier transform infrared analysis allowed one to devise of an acetone sensing mechanism for dissociative acetone adsorbed on the α-Fe2O3/ZnO nanocages, involving the first oxidation of acetone to form formate and acetate complexes, followed by further oxidation to CO2 and H2O. The enhanced acetone sensing performance can be attributed to the high specific surface area, abundant oxygen vacancies, well-tuned heterojunction, and optimal acid–base property.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2024
·Vol. 11
·期 1
·e202400426
·
IF 2.6
Yiting Wang,Xinran Zhao,Ruirui Cao,Jun Yang
The selection and optimization of cathode materials are crucial for enhancing the performance of aqueous zinc-ion batteries. In this work, different active materials were created by combining Sulfur powder and polydopamine in four different mass ratios. The novel N-doped carbon/WS 2 is obtained. Thanks to the optimization of the dopamine-carrying tungsten ion precursor and Sulfur powder (1 : 2, 1 : 4, 1 : 6 and 1 : 8), the four samples exhibited different morphology. The N−C/WS 2 -6-based zinc ion batteries with the highest specific capacity, 120.0 mAh/g in the first discharge at 2.0 A/g, and 78.0 mAh/g after 2500 cycles, with a capacity retention of 65 %, had a relatively good overall performance, according to the results. The reaction kinetics characteristics of the N−C/WS 2 -6 cathode reveal that diffusion has a significant impact on the processes in the aqueous zinc ionic material N−C/WS 2 -6.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Zhan Shu,Yi Zhang,Jing Ouyang,Huaming Yang
A novel antibacterial nanocomposite, CeO 2 -ZnO/HNTs was prepared by a homogeneous co-precipitation method in ethanol solution. ZnO and CeO 2 nanoparticles with sizes of approximately 8 and 4 nm, respectively, were dispersively precipitated onto the surface of halloysite nanotubes (HNTs). HNTs served as a template for reducing the agglomeration of ZnO nanoparticles and improving the interface reactions between the nanocomposite and bacteria cells. CeO 2 nanoparticles were introduced to suppress the recombination of electron-hole pairs, and narrow the energy gap of ZnO nanoparticles. The synergistic effects of ZnO, CeO 2 nanoparticles and HNTs led to the superior antibacterial activity of the CeO 2 -ZnO/HNTs nanocomposite against gram-negative Escherichia coli.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Shao Yutian,Zhang Haowen,Zhu Ruirui,Miao Yaning,Rong Enqin,Fang Qinghai,Fang Hongxin
With the rapid development of Chinese medicine industry, the main waste (medicine residue, MR) is increasing year by year, which come from the process of Chinese medicine. Therefore, it is urgent to develop a method to utilize the residue. Herein, the N-doped hierarchical porous carbons (HPCs) were prepared from MR by the salt activation strategy. The obtained HPC presents high-specific surface area of 2730.2 m 2 g −1 , moderate N, O contents, and multi-channels for ions adsorption and transfer. Impressively, the excellent zinc ion storage properties have been gained, e.g., high capacity of 103.7 mAh g −1 at 0.1 A g −1 , superb energy and power output of 74.07 Wh kg −1 and 11.58 kW kg −1 , long cycle life with capacity decay of 1.16% after 10,000 cycles. This work supplies a facile route to high-value utilization of biomass waste.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Zhen Ruan,Junzhen Di,Ting Zhang
Acid mine drainage (AMD) contains high levels of harmful heavy metal (HM) ions. To mitigate its harmful effects, this study developed novel Algae-Fungal Immobilized Bioparticles (AFIBs) using Chlorella ellipsoidea HLDA2 and Aspergillus tubingensis HLDF3. By optimizing the culture conditions of the algal-fungal system, the immobilization efficiency of the mycelial pellets formed at pH 3 reached 94.40 %. It was revealed that AFIBs effectively removed Mn(II) and Zn(II) through the mechanisms of electrostatic adsorption, ion exchange, chelation, and chemical precipitation. AFIBs outperformed both single algae and fungal systems within the Mn(II) and Zn(II) concentration range of 1 to 30 mg/L tested. The water quality index ( WQI ) of the treated AMD with AFIBs was 82.82, indicating suitability for aquatic life. In the real AMD treatment, the AFIBs decreased Mn(II) and Zn(II) concentrations to 1.832 mg/L and 1.663 mg/L, respectively, achieving removal rates of 92.97 % and 87.40 %. They also raised the pH to 8.59, adhering to the coal industry pollutant discharge standards (GB20426–2006). Thus, the novel AFIBs developed offer a sustainable solution for AMD remediation.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）