GREEN CHEMISTRY
·
2024
·Vol. 26
·期 4
·2170-2182
·
IF 9.3
Zhuosen He,Yucui Hou,Jian Wei,Shuhang Ren,Weize Wu
Formic acid (FA) is a bulk chemical and a promising hydrogen energy carrier. The development of FA production from renewable biomass instead of multiple-step production from diminishing fossil resources is attractive. Formaldehyde (FAld) is another bulk chemical but industrial production requires high temperatures (250–600 °C). Herein, efficient oxidation of biomass to FA coupled with low-energy FAld production was developed using heteropoly acids as catalysts. Biomass and derivatives were oxidized to FA in yields of up to 88.6% while methanol was selectively oxidized to FAld at 90–190 °C with a markedly enhanced reaction rate. The synergistic mechanism has been unveiled that biomass activates methanol oxidation by boosting the catalytic redox cycle to form hydroxyl radicals and methanol scavenges the hydroxyl radicals to inhibit the overoxidation of biomass. This work opens up a promising direction for efficient FA production from biomass coupled with low-energy oxidation of alcohols to aldehydes.
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Surface Topography-Metrology and Properties
·
2022
·Vol. 10
·期 4
·045025
·
IF 2.185
Ling Pan,Yuqing Han,Yunhui Chen,Liming Guo
Graphene exhibits great potential as an additive to enhance the anti-wear and friction reduction capacity of moving mechanical components in a synergistic mechanism with the base oil. This paper considers the effect of different factors such as the number of base oil molecules, graphene content, normal load, sliding velocity and the presence of graphene. The synergistic mechanism of graphene and base oil is investigated by experiments and molecular dynamics (MD) simulations. The results show that the friction and wear reduction is due to the formation of the load-supporting graphene layers and sufficient base oil molecules between Fe slabs. Graphene can stably adsorb on the rubbing surfaces lubricated by the base oil, confirming that graphene can form a physical deposition film on rubbing surfaces. Low friction and wear can be achieved with higher sliding velocity and lower load. Furthermore, compared to the sliding velocity, the load significantly affects the mean square displacement of base oil and oleic acid molecules. These outcomes provide a better understanding of the tribological properties of graphene as a lubricant additive.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Zhen He,Quanwei Lv,Xia Jiang,Yang Su,Guangmei Cao,Xianggang Zhang,Lingling Xie,Haijun Wu
The co-pyrolysis of straw and polyethylene (PE) enhances pyrolysis oil quality by reducing oxygenated compounds and increasing hydrocarbons. However, the synergistic mechanisms between straw's main components (cellulose, hemicellulose, and lignin) and PE are not well understood. This study investigated these interactions, revealing a two-stage reaction: cellulose and hemicellulose dominate the first stage, while PE and lignin dominate the second. Significant synergistic effects were observed at 550 °C during the co-pyrolysis of straw and PE, resulting in at least a 17.84 % increase in alkanes and a decrease in oxygenated compounds. Free radicals from PE facilitated the cleavage of carbonyl bonds and promoted deoxygenation, leading to more hydrocarbons. Hemicellulose inhibited ester conversion (ΔV esters = −3.00 %), while lignin suppressed ketone and alcohol formation (ΔV ketones = −12.14 %, ΔV alcohols = −1.07 %). These findings align with straw-PE co-pyrolysis results, providing new insights into the synergistic mechanisms between lignocellulosic biomass and plastics.
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Chen-Yan Hu,Li-Li Hu,Tian-Yang Zhang,Xin-Yu Yang,Hao Liu,Jia-Nan Chen,Ling-Mei Gao,Zheng-Yu Dong
Emerging contaminants (ECs) have received widespread attention. In this study, the Far-UVC (222 nm) combined with chlorine (UV 222 /chlorine) system is used to remove ECs from water. The results reveal that carbamazepine (CBZ) was effectively degraded by the UV 222 /chlorine system, with a degradation efficiency of 92.5 % within 45 min at a UV fluence of 666 mJ cm −2 and a chlorine concentration of 200 μM. Quenching experiments indicate that HO• and Cl• play a major role in the UV 222 /chlorine system. The steady-state concentrations of HO• (3.85 × 10 −14 M), Cl• (8.55 × 10 −14 M), and ClO• (9.13 × 10 −12 M) in the UV 222 /chlorine system is determined by using probe method. The degradation of CBZ by UV 222 /chlorine system (92.5 %) is significantly better than that of UV 222 alone (32.3 %) and the UV 254 /chlorine system (78.3 %) at the same UV dose. In addition, the UV 222 /chlorine system exhibits excellent EE/O performance of 0.53 KWh/L, effectively reducing resource consumption. Compared with the UV 222 /peracetic acid (PAA) system, the UV 222 /chlorine system shows higher degradation efficiency for CBZ in a wide pH range of 4 to 9. In addition, the presence of Cl − and HCO 3 − shows no significant impact on both the UV 222 /chlorine and UV 222 /PAA systems. The UV 222 /chlorine system is expected to become a promising alternative to traditional UV and chlorine disinfection techniques in water treatment . This study provides technical support for promoting the practical application of the UV 222 /chlorine system.
研究领域:
环境科学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ling-Ling Zheng,Lei Tian,Dengke Wang,Ying Chen,Qian-Qian Tang,Qiu-Ju Xing,Xiao-Zhen Liu,Dai-She Wu,Jian-Ping Zou
Highly efficient and synergetic adsorption and activation of persulfate are the main challenges of the persulfate-based advanced oxidation processes. Herein, we synthesized a series of BiVO 4 -X with tunable ratios of (0 1 0)/(1 1 0) co-exposing facet to remove the sulfamethoxazole (SMX) via the regulation of adsorption and activation of peroxydisulfate (PDS). Under visible light, the BiVO 4 -2 with the (0 1 0)/(1 1 0) co-exposing facet ratios of 1.5 can efficiently remove 95.71% SMX in 120 min. Based on the PDS adsorption concentration-texture coefficient model (C-TC), Density functional theory (DFT) calculation and relevant experiments, we confirm the top (0 1 0) facet of BiVO 4 -X can act as the reactive plane to adsorb the PDS via a hanging method. And the photo/electrochemical tests show the facet-dependent internal charge transfer from the (1 1 0) to the activated (0 1 0) facet in the BiVO 4 -X. Finally, we propose the synergistic mechanism of adsorption and activation of PDS via the BiVO 4 -X for organic pollutants degradation. This work develops a new method to precisely regulate the co-exposed facets of crystal materials and illuminates the synergetic mechanism of the simultaneous adsorption and activation of PDS via the regulation of co-exposing facets of the BiVO 4 in the persulfate activation system.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PLoS One
·
2025
·Vol. 20
·期 2
·e0316172
·
IF 2.6
Nian Liu,Chaoyi Chen,Junqi Li,Dong Liang
The raw material for smelting brown corundum is high-quality bauxite. As the quality of bauxite decreases, the main impurity, silicon content, increases, which affects the product quality and smelting energy consumption. Additionally, the smelting process produces a significant amount of brown corundum fly dust (BCFD) with a low utilization rate, resulting in resource wastage. In order to utilize low-quality bauxite and BCFD, this article proposes the method of “roasting-alkali leaching.” Through mixed desilication, the impact of alkali leaching factors on desilication is investigated, analyzed the desiliconization mechanism of BCFD, and established the kinetics of the desilication reaction. Results indicated that the optimal conditions for mixed desilication are BCFD/bauxite mass ratio of 1:6, desilication temperature of 95°C, desilication time of 30 min, alkali concentration of 110 g/L, and liquid-solid ratio of 10:1, achieving a desilication rate of 60.90%. The Al-Si ratio (A/S) of the concentrate increases from 5.33 to 11.72, meeting the requirements for brown corundum smelting raw materials. The desilication reaction follows a solid shrinkage core model, with a kinetic equation of 1−2/3α−(1−α) 2/3 = 15.50exp[−29299/(RT)]·t, and an apparent activation energy of 29.30 kJ/mol. The synergistic mechanism involves fine particles of the BCFD adsorbing on the surface after mixing with the bauxite, increasing the mineral surface area and the activity of silicon, thereby accelerating the reaction rate.
研究领域:
冶金工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Processes
·
2021
·Vol. 9
·期 3
·404
·
IF 2.847
Maoyan An,Yinfei Liao,Yijun Cao,Xiaodong Hao,Longfei Ma
The mixed collector can improve low rank coal flotation efficiency, but its synergistic mechanism needs to be further explored. In this paper, oleic acid-dodecane (OA-D), oleic acid (OA), and dodecane (D) were employed to treat the low rank coal for revealing new synergistic mechanism of the mixed collector. First the surface free energy of the coal, the surface free energy of coal-water and coal-water-coal were calculated. Then wetting heat measurement, X-ray Photoelectron Spectroscopy (XPS) and FTIR were used to analyze synergistic mechanism of the mixed collector in depth. The results showed that OA-D obtained a higher combustible recovery than using OA and D, respectively. The essence of synergetic mechanism of OA-D was that they formed a relatively ordered “supramolecular structure” on the low rank coal surface, especially there were hydrophobic and van der Waals forces between the oleic acid chain and the dodecane chain that can promote the formation of a continuous collector film.Keywords:low rank coal;mixed collector;synergetic mechanism;supramolecular structure
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2016
·
IF 1.762
Wenping Wang,Bibi Ji,Chen Zhang,Xiaohua Cao
Firstly, we synthesized a novel spin crossover coordination compound 1 {[Fe(MPEG-trz) 3 ](BF 4 ) 2 }(MPEG-trz: polymeric ligand obtained by amidation reaction between methoxy polyethylene glycol (MPEG) and 4-amino-1,2,4-triazole (NH 2 -trz)). And then a suite of coordination compounds {[Fe(MPEG-trz) m (NH2-trz) n ](BF 4 ) 2 }(m = 2, n = 1, 2 ; m = 1.5, n = 1.5, 3 ; m = 1, n = 2, 4 ;) have been successively synthesized by self-assembly reaction between Fe(BF 4 ) 2 ·6H 2 O and MPEG-trz/NH 2 -trz in different proportion respectively. The structure detail is obtained through FT-IR, XRD and 1 H NMR measurements, while spin crossover behavior of these coordination compounds are inspected by superconducting quantum interference device (SQUID) and DSC . The new polymeric composites not only show mechanical behavior particular the malleability but also exhibit an abrupt spin crossover behavior with a slender hysteresis loop. Simultaneously we speculated the probably cooperative formation mechanism of spin crossover system on the based of analysis upon the magnetic performance among these coordination compounds with different proportions in MPEG-trz and NH 2 -trz.
研究领域:
材料化学
·
配位化学
·
物理化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Jiale Deng,Chenglong Liu,Xiaohong Wang,Longzhen Qiu
Moisture electricity generation (MEG) devices based on biomass materials often face limitations in practical applications due to their poor power generation performance. To address this challenge, this study developed a biomass-based MEG device by chitosan and sodium lignosulfonate, significantly improving the energy output of biomass-based moisture generation devices. The MEG device achieves an open-circuit voltage up to 1.4 V and a short-circuit current of approximately 40 μA·cm −2 at a relative humidity of 75 %, enabled by the synergy of multiple mechanisms. Additionally, the device exhibits excellent linear scalability and supports series-parallel configurations, enabling it to power small electronic devices such as calculators and light-emitting diodes, as well as serve as a sensor for respiration detection. This work presents an innovative strategy for utilizing biomaterials in energy generation, offering new opportunities for sustainable development and advancing green energy technologies.
研究领域:
生物材料学
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shengyu Zhang,Gongxin Zhang,Shuangzhi Wu,Zhongjie Guan,Qiuye Li,Jianjun Yang
Integration of photothermal materials and photocatalysts can effectively improve photocatalytic hydrogen production. However, the synergistic mechanism of photothermal effect and heterojunction still need to be deeply investigated. Herein, Co 3 O 4 @ZnIn 2 S 4 (ZIS) core–shell heterojunction was constructed as a photothermal/ photocatalytic integrated system for photocatalytic hydrogen production. The photothermal effect induced by Co 3 O 4 boosts the surface reaction kinetic of hydrogen evolution with an apparent activation energy decrease from 42.0 kJ⋅mol −1 to 33.5 kJ⋅mol −1 . The photothermal effect also increases the charge concentrations of Co 3 O 4 @ZIS, which ameliorates the conductivity of Co 3 O 4 @ZIS and thus benefits to charge transfer. In addition, a p-n junction forms between Co 3 O 4 and ZIS and provides a built-in electric field to enhance charge separate and prolong charge life time. Benefiting from the synergy of photothermal effect and heterojunction, the photocatalytic performance of Co 3 O 4 @ZIS is significantly improved with a highest hydrogen evolution rate of 4515 μmol⋅g −1 ⋅h −1 , which is about 3.5 times higher than that of pure ZIS. This work offers a full perspective to understand the photothermal/photocatalytic integrated conception for solar hydrogen production.
研究领域:
材料科学
·
光催化
·
能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zhongpan Zhang,Xiaoqiang Fan,Xiaoliang Ma,Minhao Zhu
To unify the lubrication characteristics of carbon spheres (CS) with high load-bearing capacity and molybdenum disulfide (MoS 2 ) with exceptional low-shear friction performance, CS wrapped with MoS 2 (C@MoS 2 ) were accomplished via an efficient and facile hydrothermal method based on the self-assembly principle. Then, 0.5 wt% C@MoS 2 particles were dispersed into Poly Alpha Olefin 40 (PAO 40) for enhancing the anti-friction/wear abilities. Subsequently, 0.5 wt% of C@MoS 2 particles were dispersed into Poly Alpha Olefin 40 (PAO 40) to enhance its anti-friction and wear-resistant capabilities. The excellent tribological properties of C@MoS 2 particles were attributed to the synergistic lubrication between bearing and filling effect of CS as well as the superior antifriction capacity of MoS 2 shell. Furthermore, the synergetic lubrication mechanism of C@MoS 2 may be segmented into different stages: I. the shell crushing stage, corresponding to the rolling bearing effect of C@MoS 2 particles at the friction interface; II. the core/shell separation stage, corresponding to the rolling bearing effect and self-repair effect of C@MoS 2 particles; III. the core/shell recombination stage, corresponding to the construction and reinforcement of protective film and the great improvement of anti-friction/wear abilities performance.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 6
·2508-2516
·
IF 3.665
Tao Zheng,Wengui Wang,Yaochi Liu
In this work, a novel phosphorus–nitrogen flame retardant (CN-DOPO), which was successfully prepared via a facile method of graphitic carbon nitride (g-C 3 N 4 ) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Polyamide 6 (PA6) composites were then prepared through melt blending with different ratios of g-C 3 N 4 /DOPO and different contents of CN-DOPO. CN-DOPO was characterized and confirmed using X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), and scanning electron microscopy (SEM). PA6/CN-DOPO composites were investigated by limiting oxygen index (LOI), vertical combustion (UL-94), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), and thermogravimetric analysis-infrared spectrometry (TGA-IR). The results indicated LOI value was increased from 23.4% to 29.2% and successfully passed UL-94 V-0 rating when the presence of CN-DOPO increased to 15 wt%. Moreover, mechanical properties of PA6/CN-DOPO composites had not deteriorated significantly due to CN-DOPO having better dispersion and compatibility in PA6. The morphological of char layer revealed that CN-DOPO formed a highly integrated char layer surface during the combustion process, as compared to that of pure PA6. Meanwhile, CN-DOPO decomposed to release gases could inhibit decomposition by diluting flammable volatiles. Accordingly, the special gas-condensed phase synergistic flame-retardant mechanism of PA6/CN-DOPO was proposed. This work indicated that CN-DOPO could endow PA6 with highly effective flame-retardant and good mechanical performance.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）