PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
·
IF 7.8
Qihong Cai,Xiaodan Zheng,Sujun Fang,Qifeng Zou,Hang Zhu,Zhima Yangcuo,Yajuan Zhang,Yong Lin,Chunyan Lian,Shiqi Zhang
The weakly fluorescent of chlortetracycline hydrochloride (CTC) and tetracycline hydrochloride (TC) were alkalized under sodium hydroxide (NaOH) to produce products with strong fluorescence. When the two products were coated with cetyltrimethyl ammonium bromide (CTAB) micelles, the fluorescence intensity was further enhanced, which greatly improved the detection sensitivity. Since the conventional fluorescence spectra of CTC and TC alkaline hydrolysis products-CTAB overlapped seriously, synchronous fluorescence spectra scanning were performed at the wavelength difference (Δλ) was 43 nm to simplify the spectra. Then the two synchronous fluorescence spectra were treated with the first derivative. When λ= 350.6 nm, CTC was measured, here the relative fluorescence intensity of TC was 0. Similarly, so did TC at 360.4 nm. The zero-crossing determination was skillfully utilized to eliminate the mutual interference between the two drugs. Moreover, the fluorescence intensity of water sample background was suppressed to nearly 0 at the zero-crossing. The result showed that detection limit of CTC and TC were 0.2593 ng·mL −1 and 0.2199 ng·mL −1 . Recoveries of CTC and TC in water were 86.42 %-99.17 % and 90.56 %-97.79 %, respectively. The new first derivative synchronous fluorescence spectrometry had the merits of speed, simplicity, sensitive, good selectivity and high accuracy, and it was also environmentally friendly.
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Materials Today Chemistry
·
2026
·
IF 6.7
Yang Yu,Ying Jin,Jiatong Wang,Jilong Yao,Haiming Cheng,Zixu Zhang,Longyi Jin
Metal halide perovskites demonstrate excellent photoluminescence and have shown great potential in developing eco-friendly and reversible anti-counterfeiting materials based on polar solvent-induced photoluminescent color changes. However, it remains challenging to simultaneously achieve high quantum yield, excellent stability, and highly sensitive detection of trace polar solvents such as methanol. In this study, a novel terbium-based metal halide 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O was synthesized via solid-phase milling. Sb 3+ doping significantly enhanced its PL performance and stability. The 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O sample showed bright yellow emission with a PLQY of 68.3 % under UV irradiation and reversible water-induced yellow-to-green transition. This enabled the achievement of dual-patterned information encryption and anti-counterfeiting applications by using water-induced 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O and 20 % Sb 3+ : Cs 3 TbCl 6 @PMMA. Furthermore, due to the high charge density of the rare earth ion Tb 3+ and its strong affinity for polar solvents, an ultra-sensitive PL response was achieved for 20 % Sb 3+ : Cs 5 TbCl 8 ·6H 2 O in organic solvents of different polarities. Liquid-phase methanol induced the most pronounced ΔEA value (0.083) among 17 solvents, enabling highly sensitive detection with a limit of 0.01 % after 30 s ultrasonication. Complementary to its solution performance, the material also demonstrated exceptional responsiveness to methanol vapor, where a rapid and reversible PL transition occurred within 7.2 s at 60 °C. This work offers a feasible strategy for designing stimuli-responsive luminescent materials.
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Energetic Materials Frontiers
·
2026
·
IF 3.9
Hui-jie Zhang,Jian-bin Li,Xin Yu,Su-hang Chen,Yu-qi Zhu,Shi-zhou Ma,Kai-chuang Zhang,Qi-hang Chen,Feng-qi Zhao,Kang-zhen Xu
The applications of boron-based (B) fuels in propulsion and weapon systems are hindered by inefficient combustion and harsh ignition conditions of B particles. Dual-functional energetic metal-organic frameworks (EMOFs) were synthesized on B surface by incorporating azide ligands as secondary ligands to improve the thermal and combustion properties of B particles. Polydopamine (PDA) interfacial layer was constructed between B and EMOFs to strengthen the interface interaction and facilitate the processes of mass and heat transfer. The mechanisms of EMOFs in eliminating the negative effects of oxide film and enhancing B combustion were analyzed. The results illustrate that the expansion of flame front is driven by the micro-explosion effect of azide ligands, and the flame height increases from 0.46 to 67.9 mm. Concurrently, the generated metal oxides alter the oxygen diffusion pathway by adhering to B surface, thereby significantly enhancing the oxidation process of B. The combustion efficiency of B increases from 60.7 % to 80.4 %, the oxidation temperature lowers by 77 °C, and the flame radiation intensity enhances by approximately 29 %. Crucially, the azide ligands and residual metal oxides exhibit different functions. The azide ligands exhibit the functions of ignition sensitization and micro-explosion at the combustion interface, while the adherent metal oxides promote the efficient oxidation of B particles along two distinct pathways. This innovative strategy of integrating azide ligands and metal oxides offers a novel direction for enhancing the energy release performance of B-based fuels.
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SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 7.7
Zhongyu Xiao,Xin Liu,Wenjing Zhao,Yang Liu,Quanhua Xie,Zhengkun Wang,Hassan Karimi-Maleh,Qiongyao He,Jianxin He,Nianbing Zhong
A reflective optical fiber gas sensor was developed for the accurate detection of acetic acid gas concentrations in real time. This sensor comprises a multimode quartz optical fiber and a sensing unit coated with a material that selectively responds to acetic acid. The sensing unit consists of a light channel coated with a Ag film, on which a composite film of TiO 2 /functionalized zirconium metal-organic framework (UiO-66–2CF 3 ) is deposited. Upon absorbing acetic acid, the refractive index of the TiO 2 /UiO-66–2CF 3 film increases, enhancing the light absorption at 326 nm while reducing the reflectance. This decrease in the transmitted light intensity enables the accurate measurement of the environmental acetic acid concentration by detecting the difference between the output and input optical intensities. Experiments were performed to investigate the dependence of the sensor performance on the TiO 2 content in TiO 2 /UiO-66–2CF 3 , coating thickness, light incidence angle in the optical channel, and ambient temperature and humidity. In the range of 10–40 °C and 40–80 % RH, the sensor with 45 wt% TiO 2 in the composite, a coating thickness of 55 μm, and an incident angle of 45° yielded an acetic acid gas response sensitivity of 0.0007 absorbance unit/ppm, a response time of 315 s, detection limit of 4.29 ppm, and maximum relative error below 5.0 %. The incorporation of the –CF 3 group into UiO-66 endowed the sensor with excellent humidity immunity, a high selectivity for acetic acid, and long-term stability.
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Analytical Methods
·
2026
·
IF 2.6
Jun-Xia Li,Min Gong,Chao Ma,Yao-Yao Li,Ling-Xiao Liu,Bin Wang,Jin-Jing Ren,Sheng-Ming Lei,Yun-Guo Liu
Rosa rugosa Thunb. can be skillfully blended with high-quality, mellow Baijiu to produce Rose Lujiu (RL), which emits a delightful aroma. In this study, e-nose, e-tongue, GC-MS, and GC-IMS were employed to analyze the aromatic compounds. Relative odor activity value (ROAV) analysis and orthogonal partial least squares discriminant analysis (OPLS-DA) were employed to comprehensively assess volatile compounds and predict key aroma compounds. A total of 111 volatile compounds were identified using GC-MS analysis. Additionally, GC-IMS analysis identified a total of 70 aroma compounds, among which 13 key contributors to the aroma were determined based on odor activity thresholds. These results indicate that ethyl acetate, ethyl butanoate, propyl hexanoate, and 3-methyl-1-butanol emerged as pivotal odorants enabling discrimination among different RL samples. These findings would provide valuable data for the application of commercial samples in the flavor modulation of RL.
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COMPOSITES PART B-ENGINEERING
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2026
·
IF 14.2
Anping Wang,Zhichun Zhang,Yanju Liu,Jinsong Leng
Lightweight porous aerogels have demonstrated efficient electromagnetic wave absorption performance. Nevertheless, the inherent trade-off between favorable impedance matching at the atmosphere-aerogel interface and strong electromagnetic loss within the aerogel matrix has limited the further improvement of the aerogel's electromagnetic wave absorption performance. In this study, a waxberry-inspired gradient-porous aerogel metamaterial (WGAM) was successfully fabricated via an innovative dot-matrix cooling source ice templating technique. The influences of diverse pore structures and repeating unit sizes on the performance of aerogels were systematically investigated and analyzed. The results reveal that the gradient pore structure in WGAM effectively balances the conflict between interface impedance matching and intrinsic electromagnetic loss, enabling WGAM to achieve an ultrabroad effective absorption bandwidth of 12.3 GHz within the range of 2–18 GHz. Meanwhile, owing to the 3D radial distribution of internal pores, WGAM retains robust electromagnetic wave absorption capacity even when the incident angle of electromagnetic waves is increased from 5° to 30°. Furthermore, WGAM exhibits favorable mechanical, thermal-insulating, and flame-retardant properties, rendering it a promising candidate for electromagnetic protection applications under complex and harsh environmental conditions.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
Qi Xia,Ning Liu,Qing Huang,Shengbing Wu,Qi Wang
The methanol oxidation reaction (MOR) remains constrained by the inadequate activity and durability of conventional Pt-based catalysts, particularly across varying pH environments. We present a plasma-tailored synthesis strategy to construct ordered PtFe alloy nanocatalysts anchored on N-doped graphene-carbon nanotube hybrids (PtFe@NGCNT). The synergistic effects of plasma-enhanced alloying and conductive 3D carbon architecture yield ultrafine PtFe nanoparticles (2.13 nm) with protective N-carbon encapsulation. This dual-phase configuration endows PtFe@NGCNT with superior pH-adaptive MOR performance: In acidic media, specific and mass activities reach 2.29 mA/cm² and 2524 mA/mg Pt , surpassing commercial Pt/C by 4.67 and 9.86 times respectively. Alkaline performance further escalates to 13.28 mA/cm² and 6602 mA/mg Pt , exceeding commercial Pt/C by 3.61 and 3.74 times. The catalyst demonstrates remarkable durability after long-term chronoamperometry test and 1000-cycle cyclic voltammetry scanning, attributed to plasma-induced defect engineering in the carbon matrix. This work establishes a universal plasma-engineering paradigm for creating robust, pH-versatile electrocatalysts, propelling the development of next-generation direct methanol fuel cells.
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Foods
·
2026
·Vol. 15
·期 2
·272
·
IF 5.1
Zihao Liu,Qihao Wang,Shiheng Luo,Chen Xing,Wenlu Li,Hong Zeng,Yanbo Wang
Flavor enrichment in commercial yogurts commonly relies on exogenous flavoring agents, failing to meet consumer demand for clean-label products with natural ingredients. This study developed a starter culture for malty-aroma yogurt by combiningLactococcus lactisBL-19 with a commercial yogurt starter culture. Evaluation by eleven trained sensory assessors indicated that malty-aroma yogurt exhibited a distinctive sensory profile compared with four commercially available plain yogurts. Time-series flavoromics identified 13 key aroma compounds and revealed the 3 h as the key time node of flavor evolution during fermentation. Furthermore, time-series metabolomics analysis revealed metabolic transitions from nutrient adaptation to active biosynthesis at 3 h, significantly increasing the odor-active values of the key aroma compounds. Moreover, correlation network analyses revealed potential metabolic precursors and metabolic bypass associated with the production of key aroma compounds and highlighted the valine, leucine and isoleucine biosynthesis pathway as central to malty-aroma formation. This study elucidates the evolution of flavor compounds and the underlying bioformation mechanisms of malty-aroma yogurts, offering insights for the precise flavor modulation of fermented dairy products.
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Journal of Water Process Engineering
·
2026
·
IF 6.7
Xiao Liu,Runze He,Jiachen Song,Xinyu Hou,Fei Wang
With the growing severity of environmental pollution, the treatment of organic wastewater and waste plastic bottles has become global concerns. This study explored the feasibility of synthesizing metal-organic composite catalysts using waste PET plastic by a microwave one-step synthesis process with only 4 h. Comprehensive characterizations confirmed that the bimetallic Cu/Mn-PET catalyst outperformed monometallic counterparts and pure BDC-derived catalysts, featuring a more regular polyhedral morphology, good crystallinity and excellent stability. XPS valence state analysis uncovered pronounced synergistic interactions between Cu and Mn. Notably, despite a relatively low specific surface area (11.75 m 2 /g), Cu/Mn-PET featured the highest active site density and exhibited minimal interfacial charge transfer resistance in electrochemical measurements. When combined with PMS-AOPs technology, Cu/Mn-PET achieved nearly 100% degradation efficiency for various pollutants (dyes, antibiotics, phenolic compounds) under optimized conditions, accompanied by substantial mineralization (TOC removal rates above 56.36%). Additionally, the Cu/Mn-PET catalyst also showed strong recyclability with low metal leaching concentrations, as well as good salt tolerance. Furthermore, it was proved that the catalytic mechanism of Cu/Mn-PET involved the combined action of free radical reactions and non-free radical reactions, but the non-free radical based 1 O 2 played a dominant role. Thus, a green and efficient PET microwave one-step conversion technology has been developed to prepare a bimetallic organic composite catalyst with high catalytic activity and stability successfully, which hold significant implications for environmental protection and resource utilization.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·115
·
IF 36.3
Liu Junlin,Tan Shujuan,Yang Xinrui,Zhu Jiajie,Yan Xin,Chen Tianyu,Ji Guangbin
A multi-scale cross-band military lightweight camouflage system is constructed via elaborate hierarchical structure design.
This system can achieve rich color presentation to meet the visible camouflage requirements in different backgrounds.
This system can simultaneously achieve an infrared emissivity modulation of Δε > 0.5, achieving excellent dynamic infrared stealth.
This system characterized by its light weight can also achieve efficient electromagnetic interference shielding and excellent electrothermal conversion.
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Results in Chemistry
·
2026
·
IF 4.2
Mengqi Wang,Zibo Wu
In this work, we found the flavonoid molecules: quercitrin and hyperoside have potentiality as ultraviolet (UV) filters for the first time. The steady state spectra and time-dependent density functional theory (TDDFT) were used to prove the excited state intramolecular proton transfer (ESIPT) of the non-radiative relaxation. They are excellent potential UVA sunscreens, and they can also provide some UVB protection. We demonstrated the deactivation via ESIPT can be facilitated by the hydrogen bond strengthening in S 1 . In particular, when UV excited, the enol conformation can cross a small barrier to the keto conformation, then the proton transfer process can consumes energy through non-radiative path, and the other small part dissipates through the fluorescence path. Quercetin and hyperoside with a substituent caused 10 nm wavelength change, which opens up a way for the design of new broad-spectrum sunscreens: the adjustable absorption wavelength of sunscreen molecules can be achieved by adjusting the position and number of substituents.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Zhuojun Wu,Wenwen Gong,Xiao Wang,Yuhan Zhang,Wei Zhou,Shixiong Yi,Hong Yang,Guilong Peng
The selective oxidation of methyl phenyl sulfoxide (PMSO) to methyl phenyl sulfone (PMSO 2 ) is widely used to probe high-valent metal-oxo species in advanced oxidation processes (AOPs). However, its specificity remains uncertain. This study systematically investigates PMSO oxidation by sodium hypochlorite (NaClO), sodium periodate (PI), and peroxymonosulfate (PMS) under acidic (pH = 3.0 ± 0.2), neutral (pH = 7.2 ± 0.2), and alkaline (pH = 9.2 ± 0.2) conditions. Batch experiments and kinetic simulations using Kintecus V6.80 revealed that NaClO exhibited the highest reactivity across all pH values, with second-order rate constants of 125, 25, and 2.15 M −1 s −1 under acidic, neutral, and alkaline conditions, respectively. PI was reactive only in acidic media (7.5 M −1 s −1 ), while PMS showed comparable oxidation rates under acidic and alkaline conditions (1.25 and 1.28 M −1 s −1 ), but negligible activity at neutral pH. H 2 18 O labeling confirmed 18 O incorporation into PMSO 2 even without metal catalysts, supporting oxygen atom transfer (OAT) as the dominant mechanism. These results demonstrate that PMSO oxidation and 18 O labeling are not exclusive indicators of high-valent metal species and should therefore be interpreted with caution. The study underscores the need for more selective and reliable approaches to identify transition-metal-based oxidants in AOPs.
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