CARBON
·
2025
·
IF 11.6
Yajun Wang,Tursun Abdiryim,Ruxangul Jamal,Feng Xu,Qilong Zhang,Yiming Liu
This study presents a flexible UV photodetector with an organic-inorganic hybrid structure, fabricated using advanced face-to-face self-assembly. The detector is composed of PEDOT-CH 2 OH and nitrogen-doped graphene quantum dots (N-GQDs) modified zinc oxide nanoflowers (ZnO NFs). The sulfur and hydroxyl groups in PEDOT-CH 2 OH, along with nitrogen and oxygen functional groups in N-GQDs, promote the formation and stabilization of oxygen vacancies (Vo) on the ZnO NFs surface. This significantly enhances carrier separation efficiency, reduces electron-hole recombination, and improves the detector's performance. Under 365 nm UV light, the device achieves a response rate of 1.31 mA W −1 at 0V bias, with fast rise times (0.078 s) and fall time (0.093 s). The detector shows excellent stability and rapid photonic response, providing solid support for wearable electronics and new theoretical guidance for ZnO photodetector improvements.
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Catalysts
·
2022
·Vol. 13
·期 1
·53
·
IF 4.501
Mingwen Xiong,Ying Tao,Lanlan Fu,Donglai Pan,Yuxin Shi,Tong Hu,Jiayu Ma,Xiaofeng Chen,Guisheng Li
Photocatalysis and photoelectrocatalysis, as green and low-cost pollutant treatment technologies, have been widely used to simultaneously degrade pollutants and produce clean energy to solve the problems of environmental pollution and energy crisis. However, the disadvantages of photocatalysts in a narrow absorption range and low utilization rate of solar energy still hinder the practical application. Here we fabricate two-dimensional porous Ruddlensden–Popper type nickel-based perovskite oxide La2NiO4as a noble metal-free photoanode for photoelectrocatalytic urea oxidation under full spectrum sunlight irradiation. The transient photocurrent density under near infrared (NIR) light (λ > 800 nm) can reach 50 μA cm−2. Urea wastewater was used as the fuel to obtain low-energy hydrogen production, and round-the-clock hydrogen production was achieved with the optimal yield of 22.76 μmol cm−2h−1. Moreover, a photocatalytic urea fuel cell (PUFC) was constructed with La2NiO4as the photoanode. The power density under UV-vis-NIR was 0.575 μW cm−2. Surprisingly, the filling factor (FF) under NIR light was 0.477, which was much higher than those under UV-vis-NIR and visible light. The results demonstrated that PUFCs constructed from low-cost nickel-based perovskite oxides have potential applications for low-energy hydrogen production and efficient utilization of sunlight.Keywords:round-the-clock;near-infrared light;photoelectrocatalysis;urea oxidation reaction;photocatalytic urea fuel cell;La2NiO4
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Journal of Materials Chemistry A
·
2018
·Vol. 7
·期 1
·322-329
·
IF 9.931
Naveed Ur Rahman,Wasim Ullah Khan,Wenlang Li,Shaukat Khan,Javid Khan,Shizhao Zheng,Tongtong Su,Juan Zhao,Matthew P. Aldred,Zhenguo Chi
Extending the spectral response from the ultraviolet (UV) to the visible-light range and enhancing the UV-light stability are two remaining challenges for the development of perovskite solar cells (PSCs). Lanthanide complexes show a broad absorption range in the UV region and can down convert UV-light into visible-light; thus, they are potentially able to improve the device performance of PSCs. Herein, we report the fabrication of PSCs with a novel samarium (Sm)-based down conversion nanomaterial, Sr2CeO4:Sm3+ (SCOS). In comparison to the control device without a SCOS layer, the SCOS-coated device shows an enhancement of 11.4% in photocurrent and 16.2% in average power conversion efficiency (PCE), due to the harvesting and re-emitting of UV-light in the visible range through the SCOS layer. Significantly, the SCOS-coated devices retain 50% of their initial PCE for 60 hours under continuous UV-light illumination and even after 60 days of storage under ambient environment conditions, whilst for the control device the longevity is 15 hours and 26 days, respectively. The results suggest that the SCOS layer makes an important contribution in terms of both enhanced photovoltaic performance and prolonged device stability by reducing photo-loss and photo-degradation.
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Jieyun Zhao,Lina Jiang,Chunlong Zuo,Lei Tan,Wei Tan,Yuanlin Ren,Ping Li,Xiaohui Liu
Triggered by heightened public safety concerns and the imperative of sustainable chemistry, an urgent demand has emerged for the development of eco-friendly and durable flame retardant Lyocell fibers. However, reconciling high flame retardancy, washing durability, mechanical strength, and formaldehyde-free processing within an environmentally benign and feasible approach remains a significant challenge. To address the issue, a novel co-coordination system of biomass tea polyphenols, L-lysine and Fe 3+ , cooperating with covalent linking of 3-epoxypropyl trimethoxysilane was constructed. Compared with Lyocell fabric, the treated Lyocell fabric exhibited substantial reductions of 70.35% for total heat release (THR) and 61.82% for peak heat release rate (PHRR), alongside a limiting oxygen index (LOI) value of 26.8% even after 50 laundering cycles. Meanwhile, the modified fabric had excellent UV resistance, antibacterial and hydrophobic properties. Encouragingly, the proposed modification process basically retained the high mechanical properties of the Lyocell fabrics, providing a sustainable, green route toward multifunctional, durable Lyocell textiles for protective and technical apparel applications.
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CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Huiming Xiang,Yisheng Shao,Naiyun Gao,Xian Lu,Wenhai Chu,Na An,Chaoqun Tan,Xuhui Zheng,Yuqiong Gao
The degradation of sulfonamides (SAs) in the presence of bromide during the UV/free chlorine process was investigated in this study. The reactions followed pseudo first-order kinetics. With increasing bromide concentrations of 1, 5, 10–20 µM, the degradation rate was gradually raised. The contribution of different reactive species has been calculated. The degradation products and DBPs formed by SAs were determined. The mechanisms of the degradation of SAs in the presence of bromide included hydroxylation, cleavage of the pyrimidinyl group, and bromine and chlorine electrophilic addition. The concentration of brominated disinfection by-products, including DBCM, TBM and DBAN, increased with increasing bromide dosage and degradation time, while 1, 1, 1-TCP and 1, 1-DCP decreased. In an acute toxicity test, the inhibition rate decreased in the first 5–10 min then increased after 10 min degradation when 10 µM Br − was added to the system. The initial decrease may due to the formation of low toxicity substances after the cleavage of the pyrimidinyl group, while the subsequent increase may be attributable to the increased formation of DBPs.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Shijuan Zhang,Xia Wu,Chong Ma,Yanxin Li,Jinmao You
Hexadecyl trimethylammonium bromide (CTAB) micelles were applied in the synthesis of covalent organic frameworks (COFs) for the first time to achieve the synthesis of 3D COF from 2D materials. Benzidine, one raw material for COF, was enclosed in the CTAB micelles because of the hydrophobic effect, and thus the target COF, which can be formed immediately with the aid of p-toluenesulfonic acid, grew in a micelle guided 3D form. The synthesized 3D COF showed a flower-like structure, whereas the COF synthesized without CTAB showed a smooth structure. The diameter of the 3D COFs showed direct correlations with CTAB concentrations. Moreover, the CTAB modified COF also showed a dramatically improved fluorescence property in comparison with that of normal COFs. The synthesized 3D COF showed good adsorption performance for UV filters and alkylphenols with recoveries ranged from 90.2% to 99.8%, and it also showed good fluorescence response for Pb2+. The utility of CTAB modified COF was verified in the enrichment of UV filters and alkylphenols from food packaging material migrants.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 26
·12844-12855
·
IF 3.925
Ning Yang,Lixi Xiao,Yuwei Deng,Zhiyu Wu,Hang Yin,Yang Liu,Mengru Li,Yuxuan Ye,Dandan Wang,Qiang Li,Fei Pan,Dongsheng Xia
In this study, a novel catalyst was prepared by loading OMS-2 onto activated carbon fiber (ACF) via a one-step hydrothermal method, which was further adopted for carbamazepine treatment. SEM, TEM and XRD analyses indicate that OMS-2 was successfully loaded on ACF. In the OMS-2@ACF/UV/PMS system, the degradation rate of CBZ (20 mg L−1) was 98.1% and the mineralization rate was 53.3%, which were higher than those of the traditional UV/PMS process. The enhanced performance in the presence of OMS-2@ACF was attributed to the redox cycle between Mn2+/Mn3+/Mn4+, which then accelerated PMS activation to generate more active species. The primary reactive species, including SO4˙−, ˙OH, O2˙− and 1O2, were confirmed through EPR and radical capture experiments. Additionally, the material exhibited excellent reusability even after 5 cycles, and remarkable performance for CBZ degradation was found in real water samples.
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CHEMOSPHERE
·
2021
·
IF 7.086
Hangjun Zhang,Yinan Zhang,Yuchi Zhong,Jiafeng Ding
Polychlorinated dibenzo-p-dioxins (PCDDs), characterized by their extreme toxicity, high persistency and bioaccumulation, regard as one of the most concerned environmental pollutants on the priority list. In this study, microwave-hydrothermal and photoreduction methods were adopted for fabrication of ternary Au@Fe/TiO 2 composites for removal of 2,8-dichlorodibenzo-p-dioxin (2,8-DCDD) under UV–Vis light irradiation. The acquired materials were characterized and analyzed by XRD, TEM, XPS, UV–Vis DRS, PL , etc. As a result, the 1%Au@1%Fe/TiO 2 exhibited much higher photocatalytic activity that 96.3% of 2,8-DCDD was removed within 160 min with respect to that of Fe/TiO 2 (3.0 times) and TiO 2 (5.5 times). It revealed the active substances might be produced, which were verified by ESR analysis. In a comparison, the 1%Au@1%Fe/TiO 2 also exhibited high activity in that 97.2% of 2,8-DCDD was removed within 240 min under an anoxic atmosphere. The 1%Au@1%Fe/TiO 2 systems were all pH-dependent that 2,8-DCDD could be fully degraded in neutral conditions. The results of repeatability on 1%Au@1%Fe/TiO 2 showed that the sample was high stability. Fe doping improved the charge separation of TiO 2 and Au modification improved the activity via SPR effect and Mott-Schottky barrier. The degradation mechanisms and pathways were proposed and discussed in detail. The current work develops a new approach on photocatalytic oxidation and reductive dechlorination of dioxins and may open a new opportunity to extend the application range of TiO 2 catalysts.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2012
·Vol. 23
·期 6
·1499-1510
·
IF 2.316
Wang Heyun,Feng Yakai,An Bo,Zhang Wencheng,Sun Minglin,Fang Zichen,Yuan Wenjie,Khan Massuri
Poly(ethylene glycol) methacrylate (PEGMA) was introduced into a polyurethane (PU) solution in order to prepare electrospun scaffold with improving the biocompatibility by electrospinning technology for potential application as small diameter vascular scaffolds. Crosslinked electrospun PU/PEGMA hybrid nanofibers were fabricated by a reactive electrospinning process with N , N ′-methylenebisacrylamide as crosslinker and benzophenone as photoinitiator. The photoinduced polymerization and crosslinking reaction took place simultaneously during the electrospinning process. The electrospinning solutions with various weight ratios of PU/PEGMA were successfully electrospun. No significant difference in the scaffold morphology was found by SEM when PEGMA content was <20 wt%. The crosslinked fibrous scaffolds of PU/PEGMA exhibited higher mechanical strength than the pure PU scaffold. The hydrophilicity of scaffolds was controlled by varying the PU/PEGMA weight ratio. The tissue compatibility of electrospun nanofibrous scaffolds were tested using human umbilical vein endothelial cells (HUVECs). Cell morphology and cell proliferation were measured by SEM, fluorescence microscopy and thiazolyl blue assay (MTT) after 1, 3, 7 days of culture. The results indicated that the cell morphology and proliferation on the crosslinked PU/PEGMA scaffolds were better than that on the pure PU scaffold. Furthermore, the appropriate hydrophilic surface with water contact angle in the range of 55–75° was favorable of improvement the HUVECs adhesion and proliferation. Cells seeded on the crosslinked PU/PEGMA (80/20) scaffolds infiltrated into the scaffolds after 7 days of growth. These results indicated the crosslinked electrospun PU/PEGMA nanofibrous scaffolds were potential substitutes for artificial vascular scaffolds.
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CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Jiaxing Zhao,Yongfang Chen,Xuejie Yue,Tao Zhang,Yuqi Li
Designing of a green and multifunctionally integrated cellulose-based flexible wearable material with personal thermoregulation , water and ultraviolet (UV) resistance is essential for the development of personal thermal management and smart textiles. Herein, a hydrophobic silver nanoparticles cellulose-based membrane (H-AgNPs/CEPCM) was prepared through simple solution blending, spin-coating process and chemical vapor modification. The prepared membrane exhibited excellent UV resistance due to the synergistic effect of carbon quantum dots (CQDs) as well as UV-absorbing functional groups. The spin-coated AgNPs layer with high infrared reflectivity has great radiant insulation, and temperature was reduced by 3.4 °C compared with H-CEPCM in indoor environment. Furthermore, the mechanical properties of H-AgNPs/CEPCM were significantly improved by the introduction of amide and ether bonds, as well as a large number of hydrogen bonds . This led to a tensile strength of 23.21 MPa and an elongation at break of 16.57 %, while also providing water resistance. Additionally, the H-AgNPs/CEPCM exhibited outstanding thermal stability and hydrophobicity . This work may provide a feasible and promising strategy for the construction of multifunctional integrated cellulose membrane materials for radiant insulation, outdoor textiles and novel UV protection applications.
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COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
·
2024
·
IF 3.9
Ting Hao,Xin Zhao,Zhongyao Ji,Miaomiao Xia,Han Lu,Jianmin Sang,Shaowei Wang,Linxi Li,Ren-shan Ge,Qiqi Zhu
Benzophenone chemicals (BPs) have been developed to prevent the adverse effects of UV radiation and they are widely contaminated. 11β-Hydroxysteroid dehydrogenase 1 (11β-HSD1) catalyze the conversion of inactive glucocorticoid to active glucocorticoid, playing critical role in many physiological function. However, the direct effect of BPs on human, pig, rat, and mouse 11β-HSD1 remains unclear. In this study, we screened the inhibitory strength of 12 BPs on 4 species, and performed the structure-activity relationship (SAR) and in silico docking analysis. The inhibitory potency of BPs was: for human 11β-HSD1, BP6 (IC 50 = 18.76 μM) > BP8 (40.84 μM) > BP (88.89 μM) > other BPs; for pig 11β-HSD1, BP8 (45.57 μM) > BP6 (59.44 μM) > BP2 (65.12 μM) > BP (135.56 μM) > other BPs; for rat 11β-HSD1, BP7 (67.17 μM) > BP (68.83 μM) > BP8 (133.04 μM) > other BPs; and for mouse 11β-HSD1, BP8 (41.41 μM) > BP (50.61 μM) > other BPs. These BP chemicals were mixed/competitive inhibitors of these 11β-HSD1 enzymes. The 2,2′-dihydroxy substitutions in two benzene rings play a key role in enhancing the effectiveness of inhibiting 11β-HSD1, possibly via increasing hydrogen bond interactions. Docking analysis shows that these BPs bind to NADPH/glucocorticoid binding sites and forms hydrogen bonds with catalytic residues Ser and/or Tyr. In conclusion, this study demonstrates that BP chemicals can inhibit 11β-HSD1 from 4 species, and there are subtle species-dependent difference in the inhibitory strength and structural variations of BPs.
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ChemistrySelect
·
2024
·Vol. 9
·期 17
·e202400300
·
IF 1.9
Song Yang,Shengren Li,Yuyuan Xue
Graphical This work presents UV-induced Tetrahydrofuran (THF) etching lignin-based AgNPs, the use of water to regulate the oxidation ability of THF medium, controlling the conversion of lignin-based AgNPs to AgNWs, color-variable AgNPs, AgNPs precipitation, and rapidly release Ag + , to prepare multi-functional. Its application potential in conductive coatings, and enhanced antibacterial and product separation was tested. This study presents a novel approach for regulating the properties of lignin-based silver nanoparticles (AgNPs), which was UV-induced Tetrahydrofuran (THF) to form peroxide for the etching of these nanoparticles. The lignin coating was first degraded by oxidation, and the properties of the exposed AgNPs changed under etching. Notably, water can greatly regulate the oxidation capacity of the THF medium, thereby controlling the degradation degree of lignin coating and obtaining dissolution, aggregation, precipitation, and color-variable phenomena of AgNPs under the synergistic effect of UV irradiation and peroxide etching. By adjusting UV irradiation time, various functional products of silver nanowires (AgNWs), color-variable AgNPs, lignin-based AgNPs aggregates, and composite solution of Ag particles and Ag + were obtained. The transformation of these product properties is closely related to the oxidation capacity of H 2 O/THF medium. In addition, Multi-functional Lignin-based AgNPs show excellent application potential in conductive coating, antibacterial enhancement, and product separation, providing a promising avenue for the targeted utilization of lignin-based AgNPs.
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