Journal of Physical Chemistry C
·
2017
·
IF 4.536
Wei-Long Xu,Meng-Si Niu,Xiao-Yu Yang,Peng-Qing Bi,Kang-Ning Zhang,Chao Xiong,Hong-Chun Yuan,Trevor A. Smith,Kenneth P. Ghiggino,Xiao-Tao Hao
Perovskite microplates have important implications in the fields of functional electronics and optoelectronics. We report a facile strategy, antisolvent treatment for the growth of perovskite microplates. The morphology and crystalline quality of the microplates could be controlled by the amount of the chlorobenzene antisolvent used. An appropriate amount of antisolvent facilitates the formation of high-quality perovskite microplates with no residual precursor remaining. Spatially and temporally resolved fluorescence measurements demonstrate the heterogeneity of defect-state density and recombination processes in various perovskite microplate regions. The body center shows higher defect state density when compared with that at the edge or the corner of the microplate. Excessive antisolvent degrades the microplates into smaller particles. The results of this study reveal the factors that influence the crystallization process and photophysical dynamics of perovskite microplates.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
L. Deng,Jing Ni,J.M. Qin,X.P. Jia
Nano-particle and defect have been proved to be effective in depressing the lattice thermal conductivity and improving the performance of thermoelectric materials . In this work, In 0.5 Sn x Co 4 Sb 12 were prepared using a high pressure and high temperature (HPHT) method, In and Sn was assumed that In plays the role of a filler and occupies the Sb-icosahedron voids. Doping of In and Sn results in the defects, nanostructuring, and mesoscale structuring were all combined into a single skutterudite matrix. The thermoelectric properties were measured in the temperature range of 321–710 K. As expected, with the synthetic pressures increased，the thermal conductivity of samples improved significantly. The minimum value of In 0.5 Sn 0.4 Co 4 Sb 12 synthesized at 3.8 GPa is 1.79 Wm −1 K −1 and the highest Seebeck coefficient of sample In 0.5 Sn 0.2 Co 4 Sb 12 synthesized at 2.8 GPa reached 222 μV K −1 finally.
✓ 已验证
产品关联
DOI
高影响因子
Thermal Science and Engineering Progress
·
2025
·
IF 5.4
Dongyang Qiu,Paul Amyotte,Hao Zeng,Zuyang Du,Qi Zhao,Xianfeng Chen,Chuyuan Huang,Lijuan Liu,Yi Li,Xuxu Sun
Natural gas holds enormous potential in the low-carbon transition of the global energy system, but the risk of explosions from gas leaks poses severe threats to life and property. In this study, sodium phytate and carbamide were introduced as active components, and through hydrogen bonding and ionic interactions between sodium alginate and k-carrageenan, a bio-based modified gel dry water powder (PC-GDW) was prepared and applied for the suppression of 9.5 % methane (CH 4 )-air mixture explosions. The results demonstrate that the physical performance and explosion suppression effect of dry water (DW) could be improved by optimizing the core solutions and gels. CO 2 -driven with 12 g of PC-GDW effectively weakened the energy generated by the CH 4 explosion and dissipated the reflected pressure wave, thus preventing the explosion flame from propagating to the rear of the suppression zone. Compared with the CH 4 explosion without any suppression, the peak temperature ( T p ) decreased by 94.8 %, while the maximum explosion pressure ( P max ) and maximum rise rate of pressure ((d p /d t ) max ) were reduced by 62.5 % and 71.8 %, respectively. Moreover, the synergistic suppression mechanism of the multiphase system was revealed. This work confirms that PC-GDW is a green and renewable explosion suppression material with potential applications in gas transportation and utilization.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhaohui Fei,Chi Jiang,Qunwei Tang,Yingfei Hou
To solve the scarcity of fresh water, reverse osmosis (RO) technology for seawater desalination and wastewater reuse has been developed rapidly. However, the performance of RO is limited by poor selectivity towards certain harmful small molecule constituents (e.g., boron in seawater and N-nitrosodimethylamine in wastewater) and the permeability-selectivity trade-off. Herein, a metal polyphenol network interlayer including both hydrophobic zone and monomer adsorption zone is proposed to optimize interfacial polymerization (IP) process for fabrication of RO membrane . This heterogeneous characteristic is endowed by well-chosen phenol (i.e. TTSBI) and metal (Ni). The physicochemical properties of the substrate are also optimized. An ultra-selective RO membrane with thinner separation layer, higher crosslinking degree and larger surface area is obtained. The RO membranes exhibit separation performance beyond the upper selectivity limit for NaCl and hazardous small molecules. The membrane water permeance is 3.50 L m −2 h −1 bar −1 while the NaCl rejection is 99.5 %. Meanwhile, the mechanism of the interlayer influencing IP process is investigated by combining molecular simulation and experimental methods. Our work provides a novel design direction of substrate used for fabricating RO membrane with outstanding performance.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jing Tang,Wenjian Wan,Siyuan Liu,Weijun Li,Jielei Tu,Chao Huang
Non-noble transition metals at the nanoscale offer a cost-effective and efficient solution for water splitting due to their abundance active sites and highly catalytic activity. However, nanoparticle aggregation during fabrication and electrochemical processes often leads to reduced stability and poor activity, particularly in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this study, we directly prepared ultrafine cobalt nanograins embedded in a three-dimensional (3D) flower-like N-doped carbon matrix (Co/N-C). These ultrafine Co nanoparticles provide abundant active sites, while the N-C matrix ensures high electrical conductivity. The Co/N-C composite demonstrates outstanding catalytic performance, with low overpotentials of 361 mV for OER and 80 mV for HER at 10 mA cm -2 . The Tafel slopes are also favorable, at 49.28 mV dec -1 for OER and 63.09 mV dec -1 for HER. Moreover, the Co/N-C catalyst outperforms commercial IrO 2 , exhibiting a lower overpotential of 398 mV at 50 mA cm -2 for OER compared to 464 mV for IrO 2 . A cell constructed using the Co/N-C||Co/N-C couple achieves a voltage of 1.676 V at 10 mA cm -2 and maintains a stable current for an impressive 35 h. This novel synthesis approach and material provide a valuable reference for integrating N-doped carbon with other ultrafine metal nanoparticles for various energy-related applications.
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Hai Liu,Ke Xue,Wenguang Zhu,Dingchao Fan,Zihao Dong,Yinglong Wang,Jianguang Qi,Zhaoyou Zhu,Peizhe Cui
This work introduces a sustainable and environmentally friendly process for extracting cobalt from leach solution of waste lithium-ion batteries, which can effectively reduce environmental pollution and alleviate shortage in cobalt resources. Three kinds of hydrophobic deep eutectic solvents (HDESs) were synthesized using di-(2-ethylhexyl) phosphate (DEHPA) as a hydrogen bond acceptor (HBA) and 1-butanol, 1-hexol and 1-octanol as hydrogen bond donors (HBD), which were cheap and easy to obtain and had little pollution to water. Among them, 1-butanol had the best extraction efficiency. At an extraction time of 6 min, O/A of 2:1, and pH of 5, the single extraction efficiency of 1-butanol-DEHPA for cobalt reached 95.64 %, which was higher than that when DEHPA was used alone, and the required amount of DEHPA was reduced. Furthermore, HDES exhibited good recycling ability. After five cycles of extraction, the extraction efficiency of HDES for cobalt remained above 80 %. The possible extraction mechanism was explored using the slope method, Fourier transform infrared spectroscopy , and hydrogen nuclear magnetic resonance spectroscopy . Through quantum chemical calculation and optimization, it has been demonstrated that a cation exchange exists between HDESs and cobalt ions , and non-extractive components play an important role in the extraction process. These findings will contribute to the development of environmentally friendly HDESs and improvement of cobalt recovery technology. Additionally, they will contribute to environmental protection and reduction of environmental pollution.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Huirong Chen,Jiamin Li,Zixin Huang,Yi Zhang,Yuee Ruan,Xiaonan Luo,Fengfeng Chen,Ruliang Liu
The increasing demand for sustainable and efficient catalytic processes has driven the development of advanced nanoreactors. In this study, we present a sophisticated Metal–organic framework (MOF)-template-mediated approach to synthesize yolk–shell Co-CN@SiO2 nanoreactors, where Co nanoparticles were supported on carbon nitride (C–N) nanosheets as the core encapsulated within a nanoporous SiO2 shell. This yolk–shell structure with confined cavities can provide a high surface area and overcome challenges such as Co nanoparticle sintering and mass transport limitations, resulting in superior catalytic performance. Remarkably, these nanoreactors achieved a 99% yield of benzyl alcohol from benzaldehyde hydrogenation under base-free conditions. Moreover, the influence of calcination temperatures on the structural evolution of the Co-based silica nanoreactors was explored, revealing the critical role of synergistic interaction between C–N and Co nanoparticles in boosting catalytic activity. Density functional theory calculations were conducted to investigate the adsorption energies of reacting species on the catalyst, providing mechanistic insights into the enhanced hydrogenation activity of the Co-CN@SiO2. This work offers valuable insights into the rational design of advanced nanoreactors for various catalytic applications, particularly in the field of green chemistry and sustainable synthesis.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jiawen Hu,Linwen Jiang,Jiawei Jin,Hang Liu,Anhua Wu,Xiaofeng Zhang
High-entropy alloys (HEAs) are important candidates for efficient electromagnetic-wave absorbing (EMA) materials, but the further design of HEA absorbers with harmonized impedance matching and excellent environmental stability remains a major challenge. In this study, a novel carbonitriding process based on a mechanochemical method is employed to prepare carbonitrided FeCoNiMn HEAs by utilizing a cyano-compound (C3H2N2) as a source of C and N. The introduction of C and N effectively optimizes the permittivity of FeCoNiMn HEAs, achieving the equilibrium of electromagnetic matching and thus improving the EMA performances (especially the bandwidth). The carbonitrided FeCoNiMn HEAs exhibit significant reflection loss (RL) and absorption capability. FeCoNiMnM0.04 achieves a minimum RL of −65.8 dB at 3.44 GHz. FeCoNiMnM0.08 achieves an ultra-broad effective absorption bandwidth (EAB) of up to 7.76 GHz at 1.62 mm, covering the entire Ku-band. In addition, the carbonitrided FeCoNiMn HEAs exhibit excellent corrosion resistance and good mechanical properties, ensuring their suitability for harsh environments. This study highlights the potential of carbonitrided HEAs prepared using a cyano-compound as highly efficient EMA materials, and provides a reference for optimizing the electromagnetic matching of HEAs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Peng Gao,Shaoqiang Yang,Zhu Xue,Guangbo Liu,Guoli Zhang,Longqiang Wang,Guobao Li,Yuzeng Sun,Yujin Chen
As a new type hydrogen storage material, Co–B hydrogen storage alloy was a hot research topic and has been paid increasing attention in recent years. In this work, a series of Co–B alloys with molar ratio of 1:1, 2:1 and 3:1 were synthesized by high energy ball-milling method. The phase, structure and morphology of the samples have been characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), which demonstrated that the samples ball-milled more than 5 h were mainly amorphous phase. Their electrochemical performance as electrochemical hydrogen storage material was investigated by galvanostatic charge–discharge process and cyclic voltammetry (CV) techniques. Electrochemical measurements showed that the Co–B alloys had excellent electrochemical hydrogen storage capacities and exhibited remarkable high rate discharge performance. Their electrochemical hydrogen storage capacity was 771 mAh/g, which was much higher than previous reports (238 mAh/g). Based on XRD and CV results, the exceptional electrochemical performances were suggested to arise from the electrochemical hydrogen storage reaction on the Co–B materials, which was brought about by the special amorphous structure and high chemical reactivity of the Co–B particles.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Simeng Wu,Yanxiang Wang,Jiangyiming Jiang,Yibo Li,Dongming Liu
Atomic doping engineering represents a forefront in enhancing electromagnetic wave (EMW) dissipation by modulating electromagnetic response-related physical properties. Despite advantages in defect polarization, its limitations in precisely tailoring conductive/interfacial polarization loss often compromise the EMW absorption. This work proposes a loss pathway self-compensating strategy based on bimetallic catalytic theory and atomic doping effect, specifically involving the in-situ growth of carbon nanotubes encapsulating Cu-doped CoSe 2 on a carbon fiber framework. Deliberately introduced Cu, as a dual-effect electronic structure modulator, facilitates the controllability of carbon nanotubes and localized charge rearrangement in CoSe 2 , achieving dynamic synergistic regulation of conductive and defect polarization loss. The multi-dimensional coupling architecture further optimizes interfacial polarization loss and impedance matching. The perfected samples exhibit brilliant EMW absorption performance, achieving an extraordinary minimum reflection loss value of − 68.4 dB and an impressive ultra-wide effective absorption bandwidth of 7.11 GHz. Electromagnetic parameter analyses and density functional theory calculations reveal direct and indirect feedback mechanisms of electronic structure on loss pathways. Radar cross-section simulations and marine corrosion tests confirm the suitability of sample for marine defence. This work presents a strategy leveraging electronic structure modulation to circumvent loss pathway compromises, supplying a new inspiration for designing advanced EMW absorbing materials.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED RADIATION AND ISOTOPES
·
2025
·
IF 1.8
Tao Gao,Xiang Gong,Jiali Liu,Sheng Hu,Wei Yu,Yuhong Liu,Jiwei Liang
A method for regulating the rutile and anatase ratio of TiO 2 products by adding tartaric acid is reported. By this method, TiO 2 with a specific anatase/rutile ratio exhibited excellent selective adsorption performance of 68 Ge and 68 Ga. Experiment shows that Tartaric acid assist synthesized TiO 2 enabled strong 68 Ge adsorption but negligible adsorption of 68 Ga. Meanwhile, the TiO 2 adsorption exhibited significant acid resistance, with minimal Ti 4+ leaching. In addition, the 68 Ga elution efficiency and 68 Ge breakthrough of radioactivity experiments demonstrated that synthesized TiO 2 achieved an initial 68 Ga elution efficiency of 75%, which remained about 65% after 200 elution cycles. Furthermore, over the four-month observation period, the 68 Ge breakthrough of the TiO 2 adsorbent did not exhibit a significant increase, remaining below 1×10 -5 . Generally, the synthesized TiO 2 adsorbent exhibits potential as a 68 Ge/ 68 Ga generator column adsorbent with outstanding acid-resistant, radiation-resistant, efficient 68 Ga elution and low 68 Ge breakthrough for long-term.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yinsheng Gu,Jia Sun,Tingyan Huang,Fang Wang,Yuchen Sheng,Yingwei Lu,Paifeng Luo
CsPbI 3 is a promising light-absorbing material for photovoltaics due to its excellent thermal stability and optimal bandgap. However, poor film quality and interfacial defects severely restricted the improvement of such devices. In addition, systematic studies on the selection of hole transport layers for inverted CsPbI 3 perovskite solar cells remain limited. In this work, we systematically compared the optoelectronic properties of four HTLs and their effects on the quality of CsPbI 3 films, including NiO X , MeO-2PACz, and their composite films. Specially, the NiO X /MeO-2PACz composite HTLs demonstrated improved substrate coverage and enhanced charge transport characteristics, thereby improving the crystallinity of CsPbI 3 films and the performance of the final device. Furthermore, dimethylammonium chloride (DMACl) compound was employed as a CsPbI 3 surface passivator, with Cl - compensating for I - vacancies to suppress Pb 0 defects and DMA + improving moisture stability. Additionally, the energy level mismatch between the ETL and PVK was significantly reduced after DMACl passivation. Through this dual-side synergistic strategy, the best-performing inverted CsPbI 3 PSCs achieve an impressive power conversion efficiency (PCE) of 15.05 % and a short-circuit current density (J sc ) of 20.9 mA cm −2 . Additionally, the unencapsulated optimized device retains 80 % of its initial PCE after 800 h of storage in dry air.
✓ 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）