CHEMICAL PAPERS
·
2017
·Vol. 69
·期 4
·580-585
·
IF 1.258
Wei Song-Bo,Tang Bo,Peng Xin-Hua
4-Nitro- o -xylene was selectively oxidized to 2-methyl-4-nitrobenzoic acid using dilute nitric acid as the oxidizing agent under atmospheric pressure. The oxidation of 4-nitro- o -xylene was effectively promoted by an addition of radical initiators. Under reflux, 2-methyl-4-nitrobenzoic acid was afforded in high yield using nitric acid combined with N -hydroxyphthalimide, cobalt dichloride (CoCl 2 · 6H 2 O), manganese acetate (Mn(OAc) 2 · 4H 2 O) and phase transfer catalyst.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Enhui Wu,Xiaoshan Feng,Yingbin Zheng,Daifeng Lin,Yongjin Luo,Yufeng You,Baoquan Huang,Qingrong Qian,Qinghua Chen
Mn–Co–O catalysts with different Mn/Co molar ratios were synthesized by means of a facile inverse coprecipitation strategy and applied for the oxidation of propane (C3H8). The XRD pattern of Co2Mn1Oδ (molar ratio of Mn:Co = 1:2) indicates a Co3O4 phase, and most Mn incorporates into Co3O4 lattice to form a solid solution. Minor distributed Mn species occur structure reforming, totally converting to a stable Co–Mn solid solution during oxidation process. Meanwhile, Co2Mn1Oδ features a porous core–shell morphology, the core and shell of which are made up of Co–Mn solid solution, giving rise to a high surface area. The optimized synergistic effect of manganese and cobalt improves low temperature reducibility and produces rich surface active Co3+ species and surface-absorbed oxygen over Co2Mn1Oδ. As a result, it exhibits a prominent excellent catalytic activity, and delivers good thermal stability in the presence of 5 vol % H2O and 5 vol % CO2. In situ DRIFTs analysis displays the reaction path of C3H8 over Co2Mn1Oδ, where dominate intermediate species formate are easily decomposed into CO2. The synthesized porous core–shell Mn–Co–O can be a promising candidate replacing non-noble catalysts toward C3H8 oxidation at low temperature.
研究领域:
催化化学
·
环境化学
·
材料科学
·
多相催化
·
能源与环境科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Haoran Li,Jiao Wang,Yanping Wang,Aimei Zhao,Bing Li,Wei Li
The band gap of CdS (E g = 2.4 eV) was narrow, which made it unable to transmit short-wave sunlight through the CIGS absorber layer. Zn(O,S) thin film , prepared by doping O into ZnS, had a wider band gap, and the raw material was green and non-toxic, making it suitable as a buffer layer for solar cells. However, CBD-Zn(O,S) usually takes longer than CdS deposition. In this work, By shortening the deposition time through the fast hydrolysis of TAA . Na 3 NTA was added in the solutions to improve the quality of Zn(O,S) thin films. The effect of Na 3 NTA concentration on the complex ion contents was investigated. When Na 3 NTA was added at a concentration of 0.04 M along with TAA (0.04 M), the film had a high T% of 88.6%, E g of 3.76 eV, and a dense grain distribution. ZnS and ZnO grew at (111) and (100) crystals, respectively. Raman and XPS analyses showed the existence of Zn–S and Zn–O bonds, indicating the high crystalline quality of the Zn(O,S) thin films prepared with CBD. Finally, when the optimal concentrations of ZnSO 4 , NH 4 OH, Na 3 NTA, and TAA were 0.04 M, 0.48 M, 0.04 M, and 0.04 M, respectively, the prepared Zn(O,S) thin films could be used as a cadmium-free buffer layer for solar cells.
研究领域:
材料科学
·
光伏技术
·
薄膜技术
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2019
·Vol. 2019
·期 9
·1273-1278
·
IF 2.578
Wenqiang Chen,Qun Jing,Qiaoqiao Zhang,Ming-Hsien Lee,Xuefang Lu,Ping Wei,Zhaohui Chen
Introduction transition metal with d 10 electrons and lone pair cations with large radius into phosphate systems are helpful to get new crystal structure configuration. Guided by the above method, the first lead cadmium phosphate, Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ), was synthesized. Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ) features a three-dimensional (3D) structure, in which Pb(1) 2 O 8 dimer and Pb(2)O 5 polyhedra are filled between the two-dimensional (2D) layers, which are composed of unique [Cd 6 P 8 O 30 ] groups. In the Pb II M II PO (M II = without or divalent metal ions) systems, the title compound is the first phosphate containing two different P–O groups simultaneously. The ratios of cation/phosphorus (C/P) and polymerization modes of P–O anions have a close relationship by many structural comparisons. Thermal analysis shows that Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ) melts congruently and is thermally stable. In addition, the UV/Vis-IR diffuse reflectance spectrum and infrared (IR) spectrum have been reported. The relationship between electronic structure and optical properties was clarified by first-principles studies. Graphical The crystal structure of a new cadmium-based compound Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ), containing two kinds of P–O groups, exhibits unique [Cd 6 P 8 O 30 ] ∞ layers.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
固态化学
·
光学材料
·
热分析
✓ 已验证
DOI
高影响因子
SENSORS
·
2017
·Vol. 17
·期 6
·1203
·
IF 2.677
Hongxiang Chen,Wei Jiang,Lianfeng Zhu,Youwei Yao
Amorphous indium gallium zinc oxide (a-IGZO) powder was prepared by typical solution-based process and post-annealing process. The sample was used as sensor for detecting C2H5OH, H2, and CO. Gas-sensing performance was found to be highly sensitive to C2H5OH gas in a wide range of concentration (0.5–1250 ppm) with the response of 2.0 towards 0.5 ppm and 89.2 towards 1250 ppm. Obvious difference of response towards C2H5OH, H2, and CO was found that the response e.g., was 33.20, 6.64, and 2.84 respectively at the concentration of 200 ppm. The response time and recovery time of was 32 s and 14 s respectively towards 200 ppm concentration of C2H5OH gas under heating voltage of 6.5 V.
✓ 已验证
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2016
·
IF 1.112
Xiaolong Wang,Yonghong Liu,Hang Dong,Qiang Sun,Yang Shen,Renjie Ji
A three-step model of the transitional phase inversion (TPI) process for the formation of water-in-oil (W/O) emulsions is presented. Three types of emulsions exist in an emulsification process at different oil–water ratios and hydrophilic–lipophilic balance (HLB). A stable W/O emulsion was obtained using Sorbitan oleate (Span 80) and polyoxyethylenesorbitan monooleate (Tween 80) with a specified HLB and oil volume fraction. Oil was added into water, which contained the water-soluble surfactant, to dissolve the oil-soluble surfactant. This route allowed TPI to occur, and an interesting emulsification process was observed by varying the HLB, which corresponded to the change in the oil–water ratio. Two types of emulsions in the emulsification process were found: transition emulsion 1 (W/O/W high internal phase emulsion) and target emulsion 2 (W/O emulsion with low viscosity). This study describes the changes that occurred in the emulsification process.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Huiwen Xiong,Fei Cun,Yuanxi Lu,Heng Liu,Cheng Bao,Daixin Ye,Wenhao Weng
Although numerous peroxidase (POD) mimics have been developed, most still suffer from limited stability and catalytic efficiency. In this work, platinum-decorated mesoporous gold (mesoAu@Pt) nanozymes with ultrahigh POD-like activity were synthesized via an in-situ growth strategy. The mesoporous gold nanostructures served both as carriers to stabilize Pt nanoparticles (PtNPs) and as a scaffold to enhance their catalytic activity. Owing to the uniform distribution of PtNPs, a single mesoAu@Pt particle exhibited exceptional catalytic efficiency, with a catalytic efficiency ( K cat ) of 1.05 × 10 7 s −1 . The optimized nanozyme enabled sensitive and selective colorimetric detection of both H₂O₂ and glucose, achieving ultralow detection limits of 0.1 μM and 0.4 μM, respectively, with wide linear ranges. The total turnaround time (TAT) was 15 min for H₂O₂ and 45 min for glucose. Furthermore, mesoAu@Pt successfully distinguished cancer cells from normal cells based on their endogenous H₂O₂ release, and demonstrated reliable performance in human serum samples with <6% relative error compared to a glucometer. These findings highlight the potential of mesoAu@Pt as a robust and versatile biosensing platform for blood glucose monitoring, cancer diagnostics, and next-generation point-of-care applications.
✓ 已验证
产品关联
DOI
高影响因子
PLASMA SCIENCE & TECHNOLOGY
·
2022
·Vol. 24
·期 12
·124017
·
IF 1.842
Xinluo TIAN,Heping LI,Liyu ZHENG,Fangjian LI,Zhongyang ZHENG,Shengming YIN,Xinyun WANG,Youwei YAN
In this study, a Cr2O3 nanosheet (Cr2O3 NS) inserted Cr-Zr-O coating was developed as a hydrogen isotope permeation barrier. The Cr2O3 NSs, fabricated by rapid heat treatment, were amorphous with a thickness of only several nanometers. These Cr2O3 NSs were then incorporated into a Cr-Zr-O multi-metal oxide composite coating via a dip-coating method to form a coating. The effect of the Cr2O3 NS concentration on the morphology, microstructure and deuterium permeation resistance of the coating was studied. With the addition of 1.0 g l−1 Cr2O3 NSs, compared with the Cr-Zr-O coating without NSs, the permeation reduction factor of the resultant coating was enhanced from 249 °C to 575 °C at 500 °C. The coating, with a thickness of nearly 193 nm, achieved a comparable deuterium resistance that was above two orders of magnitude higher than the steel substrate. The results show that ceramic NSs can serve as effective fillers for enhancing the coating performance when functioning as a hydrogen isotope barrier.
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2026
·
IF 10.6
Lei Yang,Jiacheng Gao,Min Su,Li Yua,Yuan Wang,Dajun Wang,Heng Zheng,Shaojun Yuan,Like Ouyang
The depolymerization of waste polyethylene terephthalate (PET) has predominantly focused on zinc-based catalysts, benefiting from their stable Lewis acidity derived from unique 3d orbital electronic configurations. In contrast, manganese-based catalytic materials, which share similar electronic structural features, have rarely been explored. This study developed a synergistic catalytic system using commercially available, low-cost homogeneous MnCl₂·4H₂O and heterogeneous Mn₂O₃ for the methanolysis of PET which achieved complete PET conversion within 1 hour at 180°C with a dimethyl terephthalate (DMT) yield of 95.35%. Compared with other catalytic systems for PET depolymerization, the present system uniquely integrates the capability of homogeneous Mn²⁺ ions to rapidly activate methanol and swell PET with the structural stability and ease of recovery inherent to the heterogeneous Mn₂O₃ oxide. Through systematic in-situ and ex-situ characterizations (XRD, XPS, in-situ DRIFTS, etc.), it was revealed that the essence of the synergistic effect originates from a dynamic composite active center formed at the interface between Mn²⁺ and Mn₂O₃, which efficiently stabilizes key reaction intermediates and promotes product desorption. Aspen Plus process simulation and economic analysis further validate its industrial potential: although the synergistic system introduces an additional step for homogeneous catalyst recovery, its superior product yield and lower activation energy grant it significant economic advantages and industrial potential. In summary, this work establishes a novel homo-heterogeneous catalytic system, offering a strategic approach to develop efficient and scalable solutions for polyester degradation.
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2671-2681
·
IF 9.6
Ren Zhuang-He,Zhang Xin,Zhang Wen-Xuan,Huang Zhen-Guo,Yang Li-Mei,Yang Ya-Xiong,Li Zheng-Long,Li Juan,Sun Wen-Ping,Gao Ming-Xia,Pan Hong-Ge,Liu Yong-Feng
Ti-based catalysts are known to improve the hydrogen storage performance of NaAlH 4 by facilitating the dissociation/recombination of H–H and Al–H bonds. The catalytic activity of metallic Ti species strongly depends on its particle size and dispersity. Ti clusters and even single atoms are therefore highly desirable, but their controllable fabrication has been highly challenging. Herein, we demonstrate a novel facile sonochemical synthesis of a Ti–O clusters featuring single Ti atom catalyst at room temperature. Through reducing TiCl 4 by MgBu 2 with ultrasound instead of heating as driving force, numerous single Ti atoms coupled with Ti–O clusters with Ti loading on graphene (Ti 1 /Ti–O@G) up to 22.6 wt% have been successfully obtained. The prepared Ti 1 /Ti–O@G contributes high reactivity and superior catalytic activity, therefore enabling full dehydrogenation of NaAlH 4 at 80 °C in thermogravimetric mode and re-hydrogenation at 30 °C and 10 MPa with 4.9 wt% H 2 . This fact indicates for the first time that single Ti atom catalyst with high loading is highly effective in catalyzing hydrogen cycling of NaAlH 4 at remarkably reduced temperatures. Graphical abstract
研究领域:
材料化学
·
能源化学
·
纳米催化
·
储氢材料
·
无机合成
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-12
·
IF 12.264
Wei Feng,He Xiaojun,Ma Lianbo,Zhang Hanfang,Xiao Nan,Qiu Jieshan
A green low-cost route without the acid washing step is used to prepare the N,O-codoped egg-box-like carbons.
The obtained carbons possess moderate N, O contents and tuned transfer channels with three-dimensional (3D) egg-box-like structures.
The fabricated electrode exhibits high areal capacitance and long-term cycle stability.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Shangshu Peng,Shengshang Lu,Xinhai Wang,Linxi Dai,Bo Chen,Yang Wu,Quan Xie,Yunjun Ruan
The high specific surface area, excellent electrical conductivity, and chemical stability of porous carbon have increasingly garnered attention in supercapacitors. Herein, rapeseed stalks were utilized as precursors to synthesize nitrogen (N) and oxygen (O) co-doped porous activated carbon (RSAC) through processes of high-temperature carbonization and KOH activation. The optimally synthesized RSAC-10 exhibits an ultra-high specific surface area of 3085 m 2 g −1 , a specific capacitance of 354.7 F g −1 at 1 A g −1 , and remarkable cyclic stability (105% of its specific capacitance after 10,000 cycles). Moreover, a symmetric supercapacitor (SSC) fabricated with RSAC-10 electrodes and a 6 M KOH electrolyte demonstrates a high specific capacitance of 85.21 F g −1 at a current density of 0.25 A g −1 , maintaining 89.8% of its initial capacitance after 10,000 cycles. Additionally, an SSC comprising RSAC-10 electrodes and [BMIM]BF 4 electrolyte delivers an energy density of 52.6 Wh kg −1 at a power density of 375.1 W kg −1 . This work presents an effective method for valorizing crop waste and successfully prepares electrode materials with high specific surface areas alongside substantial energy and power densities.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）