CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zejun Cao,Ruixi Xiao,Yuxia Chen,Jiangtao Dong,Xuezhong Du
The widespread global use of paraquat (PQ) is attributed to its high herbicidal efficacy and low cost, however, the unresolved issue of its fatal toxicity to humans after ingestion remains a major challenge. The nanocarriers MIL-101(Cr)@MoS 2 @Fe 3 O 4 (MMF) are synthesized to load PQ through the strong π–p electron coupling between the delocalized π electrons of PQ and the localized p electrons of S atoms of MoS 2 at the interface, and then encapsulated with chitosan to construct magnetically recyclable PQ nanoherbicides with excellent stability and biosafety. The release of PQ from the nanoherbicides in simulated human gastrointestinal environments is inhibited (“PASS0” logic gate) from the source, thereby enhancing user safety. Under natural sunlight conditions, the near-infrared photothermal effect of MMF weakens the strong interfacial π–p electron coupling between PQ and MMF, resulting in the release of PQ (“YES” logic gate). The PQ nanoherbicides maintain the herbicidal efficacy of bare PQ in practical applications. The residual nanoherbicides can be easily recovered using magnets, with the collection ratios of 97.8 % and 91.1 % in water and soil, respectively, at a magnetic field strength of 0.5 T. Seed dressing, cytotoxicity, and mouse models demonstrate that the nanoherbicides have excellent biosafety for both plant growth and PQ-ingesting users. The creative PQ nanoherbicides simultaneously address the challenging issues of user safety, herbicidal efficacy, and environmental friendliness from the source.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Zishuo Gu,Jing Liao,Yaming Zhu,Jiao Huang,Yueqin Tang,Junxia Cheng,Li Yue,Xuefei Zhao
In response to the growing demand for novel materials in environmental monitoring and public safety, this study successfully synthesized fluorescent oil-rich coal-based carbon dots (ORC-CDs) via a green and facile hydrothermal route using oil-rich coal of Xinjiang as the carbon precursor. The fluorescence properties were employed as the key criterion to systematically investigate the effects of synthesis parameters, including reaction temperature, time, and nitric acid concentration. After optimization, the optimal conditions were identified as 160 °C for 12 h. The chemical structure and optical characteristics of the ORC-CDs were thoroughly characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-Vis absorption spectroscopy, and fluorescence spectroscopy. In metal ion selectivity experiments, Cr(VI) exhibited a significant fluorescence quenching effect on the ORC-CD aqueous solution at specific concentrations. Additionally, the fluorescence detection capability of ORC-CDs for Cr(VI) was further tested, and the quenching mechanism of Cr(VI) in ORC-CD aqueous solution was explored. The results showed that the fluorescence response of ORC-CDs to Cr(VI) exhibited a good linear relationship within the concentration range of 0–60 µmol L−1, with a detection limit of 0.29 µmol L−1. In the spiked recovery experiment with actual water samples (tap water and river water), the spiked recovery rate ranged from 99.1% to 106.6%, confirming the accuracy of this method in actual water sample testing. Additionally, due to their excellent fluorescence properties, ORC-CDs were successfully applied to potential fingerprint imaging, quickly presenting clear fingerprint features on smooth substrate surfaces. This work provides both theoretical and experimental support for the application of coal-based carbon dot-based multifunctional fluorescence platforms in environmental monitoring and public safety.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Zhixiang Cui,Shengnan Tian,Xiaolong Liu,Qianting Wang,Sen Zeng,Junhui Si
The efficient elimination of toxic dye and Cr(VI) from wastewater by photocatalysis is still a challenge due to the unsatisfactory photocatalytic efficiency and difficult separation of the photocatalyst . Herein, the thermoplastic polyurethane (TPU) fiber membrane was prepared by electrospinning and then titanium dioxide (TiO 2 ) nanoparticles were loaded on the fiber membrane by ultrasonic-assisted method, followed by in-situ polymerizations of polyaniline (PANI) on the surface of the membrane. The synergistic effect of TiO 2 and PANI results in faster charge migration and more efficient separation of photogenerated charge carriers. Photocatalytic experiments revealed that TPU/TiO 2 /PANI fiber membranes were highly efficient for dye degradation and Cr(VI) reduction under visible light irradiation. 99.7 % of Congo red was degraded by TPU/TiO 2 /PANI membrane within 30 min, and the reaction rate reached 0.2 min −1 . The Cr(VI) reduction efficiency was up to 99.0 % within 25 min with a reaction rate of 0.128 min −1 . Additionally, the TPU/TiO 2 /PANI membrane exhibited a low loss in catalytic activity even after recycling 10 times, suggesting superior recycling stability compared to TPU/TiO 2 membrane. The result of the electron spin resonance (ESR) experiment showed that superoxide radicals (-O 2 - ) and hydroxyl radicals (-OH - ) were involved in the photocatalytic degradation process. The prepared TPU/TiO 2 /PANI fiber membrane combined with excellent photocatalytic capacity, good stability and easy recovery makes it a good candidate for removing dye and Cr(VI) from wastewater.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Chenxi Lu,Yuanzhuo Zhou,Liangzhi Li,Hongwei Chen,Lishi Yan
Catalytic production of 5-hydroxymethylfurfural (5-HMF) from glucose is a promising routine for generation of varied value-added chemicals. Herein, Mixed-Metal metal–organic frameworks (MOFs)–Fe/MIL-101(Cr) and MIL-101(Cr, Fe) obtained from post-synthesis modification and one-pot synthesis approach respectively were applied for catalytic converting glucose to 5-HMF. The synthesized Mixed-Metal MOFs were characterized by PXRD, SEM, N 2 adsorption–desorption analysis, TGA, XPS and NH 3 -TPD. Cr-and Fe-containing Mixed-Metal MOFs Fe/MIL-101(Cr) and MIL-101(Cr, Fe) presented synergistic effect with enhanced catalytic ability for glucose transformation to 5-HMF compared with typical single-metal MOFs and sulfonic acid-functionalized MOFs. Moreover, these two Mixed-Metal MOFs also presented better thermal stability than single-metal MOFs like MIL-101(Cr). Fe/MIL-101(Cr) was found to possess higher catalytic performance than MIL-101(Cr, Fe). 55.8 % 5-HMF yield was obtained with Fe/MIL-101(Cr) at 170 °C for 2 h in DMSO/water system. In addition, Fe/MIL-101(Cr) demonstrated desired recyclability for five times without incredible loss in its activity. This study provides a Mixed-Metal strategy on MOFs for improving catalytic efficiency of glucose conversion to 5-HMF.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Taotao Qiang,Boqiang Qiu,Lu Chen,Longfang Ren
In this work, a novel adsorbent for the removal of hexavalent chromium (Cr(VI)) in aqueous solution was successfully prepared by altering the 2D Ti 3 C 2 /chitosan composite with disodium ethylenediaminetetraacetate (EDTA·2Na) agent. The successful surface loading of chitosan on Ti 3 C 2 was demonstrated by various characterization methods, including scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The adsorption of Cr(VI) by Ti 3 C 2 -based composite under various circumstances was evaluated using batch adsorption experiments. The adsorption performance of the optimal sample for Cr(VI) was investigated in detail through different influencing factors, and the adsorption process was analyzed by adsorption kinetics and isotherm model. In addition, XPS analysis of adsorbents before and after adsorption showed that some Cr(VI) was reduced to Cr(III) during the whole process, which was conducive to reducing the biological toxicity of Cr(VI). The mechanism analysis showed that the adsorption was mainly electrostatic physical adsorption, supplemented by chemical reduction adsorption. Finally, through the regeneration cycle experiment, it was found that the adsorption rate of Cr(VI) remained above 80% after six repeated adsorptions, indicating that the composite material had good stability and might have certain practical application value in the treatment of Cr(VI)-containing wastewater.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Lixin Li,Ying Lv,Chao Jia,Dawei Yin,Zilong Dong,Zhaoshun Zhan,Jiazhen Han,Jun Zhang
Traditional sludge disposal is currently restricted by the risk of secondary pollution. Sludge carbon material has gained widespread attention because of its low cost and environmentally sustainable properties. However, owing to the high ash content and low–energy density of sludge, sludge pyrolysis alone has certain limitations, and the performance of carbon materials needs to be improved. Herein, a sludge–cyanobacteria composite carbon (SCC) was easily synthesized, and the adsorption process of Cu(II) and Cr(VI) by SCC was examined. SCC-700-2-50% exhibited a high S BET (1047.54 m 2 /g) and developed pore structure rich in functional groups (such as –NH, –OH, and C–O). The combination of pore structure and functional groups improved the adsorption performance of SCC. The adsorption processes exhibited a synergistic effect in a binary system: the q m of Cu(II) and Cr(VI) were 386 mg/g and 341 mg/g, respectively, and the selectivity of Cu(II) adsorption by SCC was greater than Cr(VI). The adsorption process, examined by SEM-EDS, FTIR, and XPS analysis, indicated that Cu(II) as a cationic interface strengthens Cr(VI) adsorption through electrostatic interaction, and the anion Cr(VI) created a valid electrostatic shield against the electrostatic repulsion between H + and Cu(II), facilitating Cu(II) adsorption. SCC had great reusability: Cu(II) and Cr(VI) adsorption capacity were 90% and 84%, of the initial adsorption capacity, respectively, after six cycles. This study demonstrates the prospect of SCC as a valid adsorbent for multiple heavy metal contaminations removal.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Fang Wang,Pingxiao Wu,Meiqing Chen,Jiayan Wu,Leiye Sun,Zhongbo Shang,Nengwu Zhu
Green rust (GR), as one of mixed-valent iron [Fe(II)-Fe(III)] minerals, has received a significant attention in recent years because it is an intrinsic and essential part of biogeochemical cycling of heavy metals and DOM . The transformation of GR is a key factor in altering the environmental behavior of heavy metals, and therefore, prediction of such transformation is critical for managing environmental quality. DOM and heavy metals are recognized to have a significant impact on iron oxide transformation. However, detailed information on these phenomena and mechanisms are still limited. In this study, Cr(VI) and oxalic acid (OA) widely distributed in the natural environment were selected representatives of heavy metals and DOM. The mechanism of their influence on GR transformation and their environmental significance were clarified. GR transformed to feroxyhyte under the impact of Cr(VI) and OA, and feroxyhyte did not transform to more crystalline iron oxides after 7 days. However, OA enhanced Fe dissolution and Cr(VI) reduction while weakening the immobilization of Cr on GR. SEM results demonstrated that OA addition resulted in the collapse of the feroxyhyte structure. SEM-EDS data indicated that Cr and OA were adsorbed on GR, suggesting that this can be an essential pathway for C and Cr sequestration during GR transformation. This study reveals Cr(VI) not only favors the formation of feroxyhyte, but also stabilizes the mineral to prevent transformation and meanwhile indicates the mechanisms of organic matter interactions with iron oxide and the environmental behavior of C and Cr during the iron oxide transformation processes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yang Yu,Xiaoping Cai,Xinyang Jiao,Chengyi Xu,Jinan Niu,Peizhong Feng
Ni-Al-Cr intermetallic compounds are candidate at extreme environment due to their excellent oxidation resistance at high temperature, and the oxidation resistance of Ni-Al-Cr alloy system has been studied extensively. However, the research on oxidation resistance mechanism of porous Ni-Al-Cr intermetallic compounds is still not deep. In our work, porous Ni-Al-Cr intermetallic compounds were synthesized by thermal explosion, and the oxidation resistance of porous Ni-Al-Cr system was mainly investigated. The results indicate that Cr promotes the formation of highly protective continuous Al 2 O 3 layer, increasing the oxidation resistance at 900 °C of porous Ni-Al-Cr. After oxidation at 900 °C for 120 h, the minimum mass gain of Ni-Al-Cr products is only 6.96%.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yan Yi,Xiangyu Wang,Yaxian Zhang,Jun Ma,Ping Ning
The aquatic plant Egeria najas based biochar was innovatively constructed by modifying it with Fe 2 (SO 4 ) 3 (Fe 2 (SO 4 ) 3 @EN-BC) for Cr(VI) removal. The characterizations of Fe 2 (SO 4 ) 3 @EN-BC confirmed that Fe 2 (SO 4 ) 3 was attached to biochar in form of Fe 2 O 3 after hydrolysis and calcination under high temperature. The results showed that Fe 2 (SO 4 ) 3 @EN-BC had a high removal efficiency of Cr(VI) with approaching 99.88%, which was about 7 times higher compared to unmodified biochar (EN-BC). Batch experiments of Cr(VI) removal included initial concentration, reaction temperature, solution pH and kinetics were conducted. The adsorption kinetics could be more accurately explained using pseudo-second order kinetics model , indicating the chemical adsorption controlled the reaction process. According to the Langmuir model, the maximum adsorption capacities for Cr(VI) were 138.79, 159.36 and 190.91 mg/g at 298, 313 and 333 K, respectively. Moreover, based on FTIR and XPS results, the Fe 2 (SO 4 ) 3 @EN-BC surface was loaded with many functional groups conducive to Cr(VI) adsorption. The main removal mechanisms of Cr(VI) by Fe 2 (SO 4 ) 3 @EN-BC included adsorption and reduction, and the percentage of Cr(VI) removed by adsorption and reduction were 19.1% and 80.9%, respectively.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yuting Long,Hong Li,Wenbo Wang,Xinxin Yang,Zirui Liu
Ultrasensitive detection of highly toxic Cr(VI) is of paramount importance as trace amount of Cr(VI) will result in inevitable deterioration to human health and the environment. In this work, a novel methimazole-functionalized SERS optical fiber probe was used for the first time for Cr(VI) determination with ultrahigh sensitivity. A special functionalization process of methimazole was designed after successful fabrication of silver coated fiber probe via a SnCl 2 -sensitized solvothermal method. Dual functional methimazole guaranteed ultrahigh sensitivity and good stability of the SERS fiber probe for Cr(VI) detection. On one hand, methimazole functions as a Raman reporter which exhibits SERS peak intensity decline in the presence of Cr(VI). On the other hand, methimazole acts as an oxidation inhibitor via coordinating with silver atoms through the lone pair of nitrogen and sulfur atoms. The optimized SERS fiber probe not only presents good stability and excellent reproducibility, but also exhibits ultrahigh sensitivity (10 −11 M) which exceeds SERS or other techniques for Cr(VI) determination reported so far.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Feifei Zhang,Wei Shi,Shangyi Guan,Yugen Xu,Heng Yang,Hao Chen,Jie Xing,Hong Liu,Qiang Chen
Bi 4 Ti 3 O 12 (BIT), a typical layered-structure ferroelectric with a high Curie temperature ( T C ), is a promising material for high-temperature sensors. Herein, W/Cr co-substitution at the B-site of BIT ceramics (BITWC100 x ) is carried out to investigate the phase structure, domain structure, and electrical properties. The W/Cr addition apparently reduces the concentration of oxygen vacancies , effectively improving the ferroelectric and piezoelectric properties as well as the resistivity of the BIT ceramics. The BITWC2 ceramic exhibits a high piezoelectric coefficient ( d 33 = 31.1 pC/N), a moderate T C (651 °C), a large remnant polarization ( P r = 12.2 μC cm −1 ), and a prominent direct current resistivity (5.49 ×10 6 Ω·cm at 500 °C). Moreover, the BITWC2 ceramic possesses a large d 33 of 26.6 pC/N at an annealing temperature of 600 °C, indicating the excellent thermal stability of the piezoelectric coefficient. Overall, the BITWC100 x ceramics can be used in piezoelectric devices at temperatures up to 500 °C.
✓ 已验证
产品关联
DOI
高影响因子
Electrocatalysis
·
2022
·Vol. 14
·期 1
·78-87
·
IF 2.933
Gu Ying-ying,Xiang Ding-tao,Cai Ke,Wang Yuan-hao,Mei Yong,Han Jun,Pan Hongzhi
The rapid determination of Cr(VI) in workplace air can provide technical support for daily monitoring of occupational hazard factors in enterprises. In this paper, a bismuth film/carboxylated multi-walled carbon nanotube modified glassy carbon electrode (Bi/CMWCNTs/GCE) electrochemical sensor had been used to establish a new method for detection of Cr(VI) in workplace air. Carboxylated multicycle carbon nanotubes (CMWCNTs) were modified onto glassy carbon electrode (GCE), and bismuth (Bi) film was precoated on the modified electrode by electrodeposition. The morphology and electrochemical properties of Bi/CMWCNTs modified electrodes were characterized by scanning electron microscopy (SEM) and cyclic voltammetry (CV), respectively. The results showed that the formation of stable bismuth films and sensor’s high sensitivity were due to CMWCNTs. The differential pulse stripping voltammetry (DPSV) response of Cr(VI) at Bi/CMWCNTs modified electrode outcomes with a low detection limit of 0.18 μg/L and wider linear 0.50 ~ 25.0 μg/L. In comparison to standard spectrophotometry, the newly designed electrochemical sensor had exhibited more sensitive, convenient, and environmentally friendly, which was satisfactory in analytical application to real air samples. Therefore, the Bi/CMWCNTs/GCE electrochemical sensor has the potential applications in the rapid detection of Cr(VI) in workplace air. Graphical abstract
✓ 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）