CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiankun Cao,Yumo Chen,Hailiang Nie,Hongyuan Yan
Polyimide nanofiber aerogels loaded with thymol blue and hydroxylamine sulfate (TB-HAS@PI NFAs) were synthesized and employed as a novel sensor for colorimetric detection of breath acetone (BrAce). The enhancement of 3D multi-level pore structure of TB-HAS@PI NFAs for sensing performance was elucidated through systematical characterization results. Because the designed sensing system relied on the specific reaction of HAS with acetone, TB-HAS@PI NFAs exhibited a more sensitive response ability to acetone, ensuring that the colorimetric sensing detection will not be interfered by other coexisting gas in exhaled breath. Moreover, the sensor demonstrated a rapid response, with color changes quantitatively measured within 30 s of exposure to acetone gas. Importantly, the feasibility and accuracy of established method were confirmed through comparison with GC–MS. This research provided a promising strategy for daily health management of healthy people and diabetics.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wenjing Zeng,Hongli Fang,Juan Jia,Qingxuan Li,Zebao Rui
Formaldehyde (or HCHO) is a typical indoor air pollutant known for its toxicity and severe impacts on human health. From the perspective of users, it is highly desired to realize efficient HCHO removal and easy perception of HCHO removal effect in a single unit. Herein, the concept of perceptual purification is proposed, in which the contaminants can be effectively removed and the removal effect can be easily precepted by users through vision and/or smell. For perceptual purification of indoor air containing low-concentration HCHO, the bacterial cellulose aerogels coated with polydopamine (PDA/BC aerogels) are designed as effective and environment-friendly adsorbents for HCHO removal, which are incorporated with an indicative layer to make users perceive the working state of PDA/BC aerogels by color variation. In addition, the color change of the indicative layer from indigo to yellow directly indicates the adsorption saturation state of the PDA/BC aerogels. Such a work suggests an alternative research direction for indoor environmental treatment technologies.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 8
·085501
·
IF 3.1
Yinghong Zhu,Minling Zhou,Zhanbang Ge,Yufeng Jiao,Menghui Wang,Wujin Peng
An efficient and transition-metal-free synthesis strategy of aromatic nitriles from corresponding aldehydes with H2SO4(NH2OH)2 as the nitrogen source and Cl−/ClO− as the redox mediator was developed. The redox Cl−/ClO− showed electrochemical reversibility in acidic condition. The possible mechanism involving the transformation of Cl−, the generation and electrochemical reduction of nitrile oxides based on the results of cyclic voltammetry and constant current electrolysis was proposed.
研究领域:
有机化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACTA ASTRONAUTICA
·
2025
·
IF 3.4
Zejun Hu,Jianjun WU,Zhicheng He,Yu Zhang,Yang Ou,Qinhui Peng,Yuxuan Zhong
The electrical energy injection and ignition mechanisms of HAN-ECSP (hydroxylamine nitrate-based electrically controlled solid propellant) are critical technology limiting its engineering application. The mechanisms are investigated through the characterization and testing of various samples in this paper. The mixed cross-linking of HAN and PVA (polyvinyl alcohol) is a prerequisite for the injection of electrical energy into the propellant. directly bind to PVA, facilitating its dissolution, whereas connect via hydrogen bonding. Boric acid strengthens the cross-linking effect of PVA, resulting in a decrease in the conductivity of the propellant and an increase of the energy injection voltage, making ignition of the propellant more difficult. When the boric acid content is 0%, the propellant conductivity is 2.9 S/m, and at 120 V, the propellant can generate a 1 A electrolysis current. When the boric acid content is 2%, the propellant conductivity is 2.0 S/m, 400 V can only generate a 0.3 A current. At high voltages, the main reaction at the anode is the electrolysis of , while the main reaction at the cathode is the electrolysis of .Due to the higher electrolysis voltage of , electrical energy is concentrated at the anode interface. The propellant needs to reach a temperature above 400 °C to ignite. High boric acid content leads to the concentration of electrical energy at the cathode interface, causing the propellant to burn out and fail at the cathode. Adding water to the anode surface further intensifies this problem.
研究领域:
材料科学
·
推进技术
✓ 已验证
产品关联
DOI
高影响因子
Separations
·
2025
·Vol. 12
·期 2
·24
·
IF 2.7
Lilei Yang,Zhongwei Ding,Zhengtao Zhu,Weidong Zhang
Selective separation of hydroxylamine (HA) from metal ions to prepare high-purity HA remains a challenge. In this study, given that HA can react with carbonyl compounds, TTA (thenoyltrifluoroacetone) was screened as a carrier to prepare the polymer inclusion membrane (PIM), which was used to separate HA from metal and inorganic acid ions. The experimental results demonstrated that the PIM exhibited good selectivity for HA. During the PIM process, the proton gradient served as a driving force to transport NH2OH(I). The electrodialysis (ED) process was used to efficiently and continuously provide proton gradient without introducing other ions, which coupled with PIM to separate HA. Under the optimum conditions, the separation factors of NH2OH(I)/Na(I) and NH2OH(I)/K(I) were 30.81 and 35.11; the purity of HA was 99.4%, indicating that the PIM-ED process can be used for high-purity preparation of HA.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xuemei Wei,Xiankui Cheng,Xinyu Zhang,Guodong Sheng,Huiting Xu
The utilization of biocompatible and inexpensive adsorbents for the effective scavenging of U(VI) and Eu(III) from wastewater is still an open challenge in nuclear waste management. Herein, three kinds of α-Fe 2 O 3 nanocrystals with different morphologies, i.e., α-Fe 2 O 3 nanospheres (HNSs), nanoplates (HNPs) and nanorods (HNRs), which were exposed (1 0 2), (0 0 1), and (1 1 0) facet, respectively, was used to scavenge U(VI) and Eu(III) from aqueous solutions via an adsorption procedure. Various techniques of N 2 adsorption–desorption, FT-IR, XRD, XPS, TEM, SEM and EDS were applied to characterize these adsorbents before or after adsorption. The results indicated that the adsorption capacity of U(VI) and Eu(III) was in the order of HNPs (0 0 1) > HNRs (1 1 0) > HNSs (1 0 2), namely, α-Fe 2 O 3 nanoplates was proved to be a good adsorbents, with removal capacity of 221 mg/g and 131 mg/g for U(VI) and Eu(III) scavenged on HNPs, respectively. The kinetics of U(VI) and Eu(III) scavenging agreed with the pseudo second order kinetic model, suggesting that chemical interaction is mainly responsible for U(VI) and Eu(III) scavenging on these materials. Furthermore, the Freundlich model fit the best for adsorption isotherms of U(VI) and Eu(III). The present study demonstrated that these α-Fe 2 O 3 nanocrystals are promising materials in nuclear waste management.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zejun Hu,Jianjun Wu,Zhicheng He,Yu Zhang,Yang Li,Qinhui Peng,Shiqichang Wu
The polymer electrolyte formed by incorporating hydroxylammonium nitrate into a polyvinyl alcohol gel exhibits electrically controlled combustion characteristics, making it a promising candidate for a novel solid propellant. The current response mechanism of the propellant under high voltage is a key technical issue that remains unclear at present. In this paper, the current response and ignition characteristics of the propellant at different voltage conditions, as well as the electrode potentials of the anode and cathode, were first experimentally investigated using sensors and cameras. Under high voltage, electrolysis occurs at the anode interface involving water and nitrate, while at the cathode interface, electrolysis involves water and hydroxylamine. Due to water being electrolyzed preferentially over hydroxylamine and nitrate, a brief and intense current peak is formed during the initial electrification period. Since the electrolysis of nitrate requires a high voltage, the anode potential remains high throughout the electrification process, and the majority of the electrical energy is concentrated and injected into the propellant at the anode interface, causing it to heat up and ignite. The high temperature and melting of the propellant accelerate the electrochemical reactions, resulting in a secondary increase in current. Based on the experimental results, the kinetic relationships between the electrode potentials and the current are fitted, and the simplified electrochemical model has been established. The calculated results are in good agreement with the experimental data, thereby theoretically validating the proposed high-voltage current response mechanism of the propellant.
研究领域:
材料科学
·
电化学
·
推进剂技术
✓ 已验证
产品关联
DOI
高影响因子
Plasma Processes and Polymers
·
2024
·
IF 2.9
Qingjin Tang,Mingjia Zhang,Binhong Wu,Xin Wang,Xin Tu,Kostya (Ken) Ostrikov,Linsheng Liu,Qiang Chen
We revisit one of the most used techniques for quantifying the aqueous OH radicals (OH aq ) in plasma–liquid systems, the molecular probe method which obtains the [OH aq ] by measuring a stable material formed through a rapid reaction between the molecular probe and the OH aq . In this study, we used disodium terephthalate (NaTA) as the molecular probe; the experimental results with a theoretical analysis suggest that to obtain the correct OH aq concentration, the concentration of the molecular probe should be greater than a certain value, which depends on the types of the plasma–liquid systems. However, this is not the case in most of the existing reports in which the NaTA is often much less than the requisite value.
研究领域:
化学
·
等离子体物理
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Peng Xu,Jiaqi Feng,Na Li,Jiafan Yao,Guangchao Li,Baolin Hou
Zero-valent copper (Cu(0))-activated peroxodisulfate (PDS) generates reactive oxygen species (ROS) that effectively degrade azo dyes, but its application is limited by low Cu(I) conversion and narrow pH range. To overcome these barriers, this study introduced hydroxylamine (HA) to the Cu(0)/PDS system, boosting its oxidative capacity by accelerating the Cu(I)/Cu(II) redox cycle. Under the optimal conditions, the Cu(0)/PDS/HA system achieved a 78.5 % improvement in the degradation efficiency of orange II (AO7) within 10 min. UV-Vis spectroscopy, electron spin resonance (ESR) analysis, and scavenging experiments confirmed SO 4 •- and • OH as the primary reactive species in the Cu(0)/PDS/HA system, with minimal Cu(III) formation. A Systematic investigation of operational parameters (initial pH, Cu(0) dosage, HA concentration, and PDS concentration) and water matrix components (Cl - , NO 3 - , SO 4 2- , HCO 3 - , and humic acid) revealed their impact on AO7 removal. Furthermore, experiments in real water samples (tap, lake, and river water) validated the practicality of the Cu(0)/PDS/HA system, which was also demonstrated to effectively degrade other common pollutants. In conclusion, the present study provided an efficient strategy to bolster the oxidizing capacity of Cu(0)/PDS system, broadening its application potential for treating refractory organic pollutants.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Xin Shi,Qiuyan Bi,Zizhen Peng,Zhicheng Wang,Yakai Lin,Wenzhong Ma,Chuanjie Fang,Chao Zhang,Shiai Xu
In situ SiO 2 growth with DA-g-C 3 N 4 co-doping yields hybrid crosslinked PA layer. • Compound strategy mitigates DA-g-C 3 N 4 aggregation in PA layer. • Achieved simultaneous gains in Mg 2+ /Li + selectivity and permeability performance. • MgCl 2 rejection stayed >93% over 160 h, demonstrating excellent long-term stability. It is often difficult for thin-film composite (TFC) nanofiltration (NF) membranes to balance high separation selectivity and high permeability, and the contradiction between the two will lead to their overall performance constraints. In this study, a dual-phase regulation strategy is proposed, which adopts the in-situ sol method and the composite strategy of introducing two-dimensional materials for the preparation of organic-inorganic cross-linked polyamide (PA) NF membranes. A trimesoyl chloride (TMC) organic phase solution containing tetraethyl orthosilicate was first introduced onto the polyethersulfone (PES) substrate, followed by contact with a polyethyleneimine (PEI) aqueous phase solution containing dopamine-functionalized carbon nitride (DA-g-C 3 N 4 ), during which silicon dioxide (SiO 2 )/Si–O–Si domains were generated in situ within the PA layer. These domains restricted the free volume of the PA layer, narrowed the effective pore-size distribution, and suppressed nonselective defects, while the embedded DA-g-C 3 N 4 improved the compatibility between the nanofillers and the PA layer, thereby producing P-1Si-0.025CN membranes with an effective pore size of 0.4 nm. Compared with the P-NF membrane prepared by reverse interfacial polymerization of TMC and PEI directly on the PES substrate, Mg 2+ /Li + separation factor (SF) increased to 67.2 (Mg 2+ /Li + mass ratio is 20), salt solution flux was 27.1 LMH, separation and permeation capacity of mixed salt was enhanced, salt solution flux has increased by 4 times, and the SF has increased by 7 times, Mg 2+ /Li + ratio decreased from 20 in feed to 0.71 in permeation process. Moreover, it exhibited excellent separation performance in diluted salt lake brine, with an Mg 2+ rejection rate exceeding 98%, and it also exhibited high fouling resistance and long-term stability. Download: Download high-res image (155KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Li Yuxiang,Xie Junliang,Weng Tingyi,Lu Zhenjie,Yan Xing,Liu Yanhui,Lu Shuaishuai,Zhang Shengli,Chen Huan,Jiang Fang
Despite the short-term industrial landscape remaining unchanged, green synthesis technologies for ammonia (NH 3 ) and hydroxylamine (NH 2 OH) are critical for carbon neutrality. Alternatively, electrocatalytic nitrate reduction (NIRR) can be integrated with membrane separation technology via a modular design, simultaneously achieving pollution control and resource recovery. However, the microscopic mechanism of NIRR remains ambiguous given the complex dynamic catalytic interface, hindering advanced catalyst development. Here, we propose a three-step synergistic mechanism at dynamic catalytic interface, which integrates interfacial microenvironment regulation, OH species cycle, and reverse hydrogen spillover for efficient NH 3 and NH 2 OH synthesis across different scenarios. Notably, dual-site heterostructure catalyst exhibits almost 100% NH 3 -Faradaic Efficiency (FE NH3 ) across a wide nitrate concentration range, reaching a maximum NH 3 yield of 10.27 mmol h −1 cm −2 . The simultaneous NH 3 synthesis-recovery system maintains almost 100% FE NH3 and NH 3 recovery efficiency over 120 h, accompanied by long-term durability and negligible performance degradation. Additionally, cyclopentanone-mediated NIRR process delivers a satisfactory NH 2 OH-Faradaic Efficiency (83.48%), and the assembled zinc-nitrate battery achieves a high peak power density (57.6 mW cm −2 ).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xiaoliang Liu,Fangfang Li,Gaimei Guo,Rui Li,Zhuobin Yu,Jianxin Liu
Electrocatalytic nitrate reduction (NO 3 − RR) offers a highly promising alternative route for synthesizing hydroxylamine (NH 2 OH) under mild conditions. However, this process faces intense competition from the hydrogen evolution reaction (HER), resulting in suboptimal NH 2 OH yields and Faradaic efficiencies. This study reports a highly efficient electrocatalytic synthesis of hydroxylamine using a hydrogen-annealed CeO 2 catalyst rich in oxygen vacancies (H 2 -CeO 2 ). The study shows that oxygen vacancies not only optimize the surface electronic structure of the catalyst and enhance the adsorption of nitrate ions and reaction intermediates, but also modulate the adsorption behavior of active hydrogen, thereby facilitating its involvement in hydrogenation steps while suppressing the competing HER. Compared to the reversible hydrogen electrode (vs. RHE), the H 2 -CeO 2 catalyst achieves a Faraday efficiency of 75 ± 2% at −1.2 V and exhibits a high productivity of 459 ± 21 μmol cm −2 h −1 at −1.4 V. Through a series of in situ spectroscopic studies and theoretical calculations, we elucidate the intrinsic mechanism whereby oxygen vacancies modulate the adsorption-desorption equilibrium of H*, redirecting the reaction pathway from hydrogen evolution to hydrogenation, thereby enabling efficient NH 2 OH synthesis. This work offers a defect-engineering strategy to regulate active hydrogen intermediates for designing high-performance electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）