INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Xu Kong,Kai Wang,Zhiliang Jin
More efficient hydrogen production can be achieved by rationally designing heterojunction photocatalysts and constructing interactions between photocatalysts. Herein, The CoP/Cu 3 P (Co–Cu–P) nanocubes were designed using Prussian blue analogue (PBA) as a template through the calcination phosphating method. The novel crystalline-amorphous Co–Cu–P/GDY p-n heterostructures photocatalyst was prepared by a stir-assisted low-temperature water bath method. Under visible light irradiation, the hydrogen evolution efficiency of the Co–Cu–P/GDY-3 heterostructures reached 4790.0 μmol g −1 h −1 , surpassing that of GDY (523.9 μmol g −1 h −1 ) and Co–Cu–P (2458.5 μmol g −1 h −1 ). The remarkable hydrogen evolution activity of the composite catalyst can be attributed to the presence of p-n heterojunction, while the crystalline-amorphous structure promotes efficient interfacial charge transfer. Additionally, the rough and porous nature of the Co–Cu–P/GDY heterostructures surface facilitates mass transfer and hydrogen diffusion during photocatalysis. The charge transfer pathway of the p-n heterojunction was confirmed through various characterizations, including photoluminescence spectroscopy (PL), ultraviolet photoelectron spectroscopy (UPS), valence band X-ray photoelectron spectroscopy (VB-XPS), density functional theory (DFT) calculations, and other relevant techniques. This study offers a fresh perspective on designing PBA derivatives with graphdiyne (GDY) to construct heterostructure photocatalysts for enhanced photocatalytic performance.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Xinglin Li,Pengfei Zhu,Yu Chen,Maojie Zhang,Yunhui Jiang
In this paper, Co 2+ was successfully assembled into a complex by solvothermal method with meso-tetra (4-carboxyphenyl) porphyrin (TCPP), and then a novel P/BiOIO 3 /Co-TCPP inorganic-organic composite photocatalytic material was prepared by one-pot solvothermal method. It was found that after 60 min of reaction under visible light, the degradation rate of the preferred P/BiOIO 3 /Co-TCPP composite material for 20 mg/L oxytetracycline hydrochloride (OTC) reached 88.15 %, with its pseudo-first-order kinetic model fitting constant measured at 0.03852 min −1 . It was 5.12 and 1.52 times that of BiOIO 3 and P-doped BiOIO 3 respectively, and there was no significant decrease in activity after three consecutive uses. Meanwhile, the noxiousness of the OTC solution after photocatalytic degradation by this catalyst was significantly reduced. The characterization results indicate that the primary factor contributing to the improved activity is the P/BiOIO 3 /Co-TCPP catalyst can be attributed to the doping of BiOIO 3 by P and the coupling of Co-TCPP to BiOIO 3 , which significantly improves the catalyst's response ability to visible light. Meanwhile, P/BiOIO 3 and Co-TCPP form a Z -scheme heterojunction, which greatly facilitates the separation of photogenerated carriers. Finally, the electron transfer mechanism and possible degradation pathways of the photocatalytic degradation of OTC by P/BiOIO 3 /Co-TCPP were proposed. This study provides a feasible and effective method for the modification of BiOIO 3 -based heterojunction photocatalysts and the treatment of antibiotics in water bodies.
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Journal of Cleaner Production
·
2020
·
IF 7.246
Quan Chen,Chaoran Ma,Wenyan Duan,Di Lang,Bo Pan
Biochar is an attractive class of materials because of its various feedstock and wide application potential in agricultural and environmental remediation activities. Recent studies have suggested that biochar may both adsorb and degrade organic contaminants ; however, the properties of biochar that control its apparent interactions with organic contaminants are still unknown. In this study, p -nitrophenol was chosen as a model organic pollutant . Its adsorption and degradation by biochar were investigated with a special focus on correlations with the biochar properties. The apparent removal of p -nitrophenol by biochars increased with the increase of pyrolysis temperature. After acetonitrile extraction of the biochars, p -nitrophenol adsorption increased while degradation decreased. Thus, there was no significant change in the apparent removal of p -nitrophenol across eight reaction cycles. An analysis of the physicochemical properties of biochar showed that p -nitrophenol adsorption was determined by the biochar surface area, while the degradation may be because of the varying compositions of biochars, including free radicals , functional groups determining its redox activities, and transition metals. The relative importance of these compositions varied with the pyrolysis temperature. More extensive study is warranted on the relationship between biochar properties and reactivity for targeted biochar production and application. The results of this study provide fundamental information on biochar preparation and its application in organic pollutant removal .
研究领域:
环境科学
·
农业科学
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Coatings
·
2026
·Vol. 16
·期 10
·1173
·
IF 3.4
Yuhan Bao,Kefan Li,Siyuan Fan,Shangyong Zuo,Xuzhao He,Wenjian Weng,Xingyan Yu,Yaoting He,Chengwei Wu,Kui Cheng
HighlightsTemplate molding created nanofiber-clustered structures on P(VDF-TrFE) films.Poled films exhibited enhanced piezoelectric response and surface potential.Poled films promoted BMSC adhesion, proliferation, and ALP activity.Topographical and electrical changes were linked to cell–material interactions.Surface morphology and electrical characteristics are key factors affecting cell–material interactions on electroactive polymer films, but their coupled effects remain unclear. In this study, P(VDF-TrFE) nanofiber-clustered films were fabricated using an anodic aluminum oxide (AAO) template-assisted molding method, and their surface electrical properties were subsequently tailored by corona poling. The nanofibrous structure was formed without substantially disrupting the characteristic polar β phase. Compared with the planar film, the water contact angle (WCA) of the nanofiber-clustered film increased from 74.8° to 132.5°, indicating markedly enhanced hydrophobicity. Furthermore, corona poling increased the magnitude of the piezoelectric coefficient (|d33|) and altered the surface potential state. Protein adsorption and cell studies further showed that polarized nanofiber-clustered surfaces exhibited greater protein adsorption, more extensive cell spreading, and higher CCK-8 signals and alkaline phosphatase (ALP) activity. These results indicate that the biological interfacial response of P(VDF-TrFE) films is regulated by surface morphology, wettability, and polarization-induced electrical characteristics. This work provides insight into the combined roles of nanofiber-clustered topography and electrical characteristics in regulating cell-material interactions on P(VDF-TrFE) surfaces.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Guang Huang,Yuanhang Guo,Hong Lei Guo,Xiyue Tan,J. Paul Chen,Xiaohang Sun,Ping Zhang
A scalable design integrating hydrophobic association and multivalent electrostatics yields ultra-tough, highly stretchable polyelectrolyte hydrogels for p–n junctions. • Spontaneous assembly of oppositely charged hydrogels forms transparent p-n junctions with strong adhesion (∼ 700 N/m), high toughness (2.34 MJ/m 3 ), and co-deformability (>1000%). • The resulting hydrogel diodes exhibit stable ionic rectification under extreme deformation and enable stretchable full-wave rectifiers and deformable hydrogel batteries. • This cost-effective approach advances robust, biocompatible ionic electronics for next-generation wearable, soft-robotic, and energy applications. Flexible diodes for soft electronics remain challenging in that conventional inorganic semiconductors are mechanically fragile, and many organic/2D materials lost durability under large deformation, despite the need for efficient ion transport. Hydrogel-based alternatives offer tissue-like mechanics, biocompatibility, flexibility, and functional ionic conductivity, yet conventional polyelectrolyte hydrogels typically exhibit low toughness, and limited stretchability, particularly in p-n assemblies. Herein, we present a strategy of integrating hydrophobic association with multivalent counterion–mediated electrostatics to prepare high-toughness, stretchable polyelectrolyte hydrogels in both cationic and anionic formulations. Copolymerizing a hydrophobic comonomer and ionic monomers, followed by counterion incorporation, yields transparent, volume-contracted hydrogels with matched moduli and charge densities. Oppositely charged gels are assembled by simple contact to form p-n junctions, exhibiting strong interfacial adhesion (∼700 N m −1 ), high toughness (2.34 MJ m −3 ), and ultrahigh stretchability (>1000% elongation). These junctions co-deform, recover rapidly after cycling, and maintain stable ionic rectification under strains >1000%. Beyond single diodes, the same components enable stretchable full-wave rectifiers and deformable batteries. This scalable, cost-effective approach addresses key material limitations and advances polyelectrolyte hydrogel toward applications in wearable bioelectronics, soft robotics, and energy devices. Significance statement Flexible ionic circuits are essential for soft robots and wearable bioelectronics, but their “diodes” (p-n junctions) usually fail when stretched, bent, or twisted. We report a scalable strategy for designing ultra-tough, stretchable polyelectrolyte hydrogel p-n junctions that maintain stable ionic rectification under large mechanical deformation. The key is integrating hydrophobic association with multivalent counterion-mediated electrostatics to create gels with matched mechanical properties, strong interfacial adhesion, and co-deformability. This strategy overcomes long-standing challenges faced by conventional flexible diodes of loss of contact, interfacial delamination, and rectification collapse. These innovative junctions enable robust ionic components including stretchable full-wave rectifiers and deformable batteries, offering a practical route to mechanically robust ionic electronics for next-generation wearable bioelectronics, soft robotics, and energy-harvesting devices.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Tianchi Zhang,Yaoting Wen,Chenglong Xia,Xuhui Xu,Guoping Wang,Yongcai Zhang
Developing efficient, recyclable heterogeneous catalysts for the oxidation of p-methoxytoluene (p-MT) remains a critical challenge in industrial organic synthesis. Herein, a ternary Co-Mn-Ce oxide catalyst was synthesized via co-precipitation and systematically optimized to address limitations in mass transfer and catalyst reusability. By modulating the Ce content, the structural evolution from cobalt‑manganese spinel phases to CeO 2 -dominated crystallites was demonstrated, significantly influencing catalytic performance. The CoMn 3 Ce 1.9 catalyst with high Ce loading exhibited a p-MT conversion of 95.0% under mild conditions, outperforming the low-Ce analogs, which showed only 50–60% p-MT conversion. Characterization revealed that CeO 2 -rich catalysts featured larger average pore sizes (18 nm vs. 2–4 nm for spinel-dominated systems), mitigating diffusion constraints and enhancing oxygen activation. High-concentration experiments (8 mL p-MT) maintained 77.7% conversion after 12 h, but with increased esterification to p-methoxybenzyl acetate (p-MBAc). Remarkably, the catalyst retained >70% activity over four runs. This work highlights the optimized pore architecture in overcoming traditional limitations of spinel-based catalysts, offering a sustainable, scalable strategy for aromatic aldehyde synthesis. The findings provide critical insights into designing multifunctional heterogeneous catalysts for selective C(sp 3 )-H bond activation, with broad implications for green chemical manufacturing.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wenjie Shu,Yuxia Tang,Bingwen Su,Aijun Hong,Lin Lin,Xiaohui Zhou,Zhibo Yan,Jun-Ming Liu
Recently, the p-type semiconductor AgSbTe2 has received a great deal of attention due to its promising thermoelectric performance in intermediate temperatures (300–700 K). However, its performance is limited by the suboptimal carrier concentration and the presence of Ag2Te impurities. Herein, we synthesized AgSb1–xCuxTe2 (x = 0, 0.02, 0.04, and 0.06) and investigated the effect of Cu doping on the thermoelectric properties of AgSbTe2. Our results indicate that Cu doping suppresses the Ag2Te impurities, raises the carrier concentration, and results in an improved power factor (PF). The calculation reveals that Cu doping downshifts the Fermi energy level, reduces the energy band gap and the difference among several valence band maximums, and thereby explains the improvement of PF. In addition, Cu doping reduces the thermal conductivity, possibly attributed to the inhibition of Ag2Te impurities and the phonon softening of the AgSb1–xCuxTe2. Overall, Cu doping improves the ZT of AgSb1–xCuxTe2. Among all samples, AgSb0.96Cu0.04Te2 has a maximum ZT of ∼1.45 at 498 K and an average ZT of ∼1.11 from 298 to 573 K.
研究领域:
材料科学
·
热电学
·
半导体物理
·
能量转换
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 10
·9163-9170
·
IF 2.195
Li Yixiao,Han Jun,Xiang Qingpei,Zhang Chuanfei,Li Jing
The thermoelectric properties of SiGe– x %SiMo composites are studied from 323 to 1173 K. Electrical conductivity increases with SiMo concentration due to improved carrier mobility and reaches a peak of 1735 S cm −1 when x = 20. The sample SiGe–20%SiMo shows the highest PF of 2.9 mW −1 m −1 K −2 at 1073 K, which is 31.8% higher than the PF value of SiGe. Although total thermal conductivities increase after SiMo addition, the lattice thermal conductivities are reduced due to strengthened phonon scattering by the presence of MoSi 2 . The ZT of SiGe is 0.64 at 1073 K. It is increased for all the composites in the high-temperature range between 773 and 1073 K, which is beneficial to high temperature application of SiGe alloys. SiGe–20%SiMo shows the highest ZT of 0.79 at 1073 K.
研究领域:
材料科学
·
热电学
·
半导体合金
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WATER SCIENCE AND TECHNOLOGY
·
2019
·Vol. 80
·期 5
·902-910
·
IF 1.624
Qun W.,Jingnan Z.,Hong L.,Mengling L.,Xiaohui L.,Zhichao Y.,Tao H.,Pengyu W.
In this study, a mesoporous TiO 2 /carbon catalyst (TiO 2 /C) was prepared by a facile impregnation-carbonization approach to catalyze ozonation of p -chloronitrobenzene ( p -CNB). The catalyst was well characterized and the catalytic efficiency under various conditions was systematically evaluated. TiO 2 /C has a disordered mesostructure with a high specific surface area. 92.8% of p -CNB (2 μmol/L) can be degraded within 20 min in the TiO 2 /C/O 3 system in the presence of 1 mg/L O 3 , 100 mg/L catalyst, at pH = 5. Based on the evaluation of the effect of basic parameters, it could be deduced that the removal of p -CNB relied on the synthetic effect of catalysis by TiO 2 /C and the autocatalytic induction of p -CNB. The removal efficiency of p -CNB, the structure change and the leaching of Ti ions were also evaluated in five cycles, indicating TiO 2 /C is stable and recyclable for catalytic ozonation in water treatment.
研究领域:
环境科学
·
催化化学
·
水处理技术
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材料科学
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环境工程
·
纳米材料应用
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高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Guo Tian,Liang Tang,Jieling Zhang,Shenglong Wang,Yue Sun,Yong Ao,Tao Yang,Da Xiong,Hongrui Zhang,Boling Lan,Lin Deng,Weili Deng,Weiqing Yang
Ultrathin epidermal piezoelectric sensors are essential in the next generation of wearable flexible electronics due to their conformal contact with the skin. However, the fabrication and peeling of ultrathin film still face great challenges, and there is an urgent need to develop a facile and effective process. Here, we propose a method of combing spin-coating and aqueous phase exfoliating to prepare the ultrathin poly(vinylidene fluoride-ran-trifluoroethylene) (P(VDF-TrFE)) piezoelectric film with a thickness of about 3 μm. And the thermal treatment is employed to improve its crystallinity and piezoelectricity, resulting in the piezoelectric coefficient of 11.67 pC N–1 and fine sensitivity of 4.56 mV kPa–1. The ultrathin device is successfully applied to monitor the signals of arterial pulse and interactive force, which is expected to provide references for medical diagnosis and robot design. Notably, this work might motivate design principles and methods of ultrathin epidermal devices and promote its applications in wearable flexible electronics.
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JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
·
2022
·
IF 1.914
Yiwen Yuan,Jianping Zhao,Jianfeng Li
Utilizing tetraphenylporphyrin (TPP), tetratolylporphyrin (TTP), tetramesitylporphyrin (TMP), and tetra- p -chlorophenylporphyrin (T p ClPP) as ligands, several five-coordinate high-spin p -toluenethiolate Manganese(II) complexes are isolated and studied by UV-vis, single-crystal X-ray and EPR spectroscopies. The crystal structures show noteworthy features including flexible axial p -toluenethiolate ligands and intramolecular C−H ⋅ ⋅ ⋅ π and π - π interactions between ligands and porphyrin planes. All four products are further studied by X-band EPR on both solid and solution states at 4 K which confirmed the S = 2/5 high-spin states. Temperature-dependent EPR and measurements with different equivalents of ligands are also reported for comparison. The work provides new references for the study of the active center of P450s and the biochemical reaction between cysteine residues and heme.
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RSC Advances
·
2022
·Vol. 12
·期 43
·27709-27715
·
IF 4.036
Shuiqin Chai,Lijia Zhou,Yuting Chi,Linshuo Chen,Shuchen Pei,Bin Chen
It is an urgent challenge to develop efficient antibacterial agents against resistant bacteria in the treatment of infectious diseases. Carbon quantum dots (CQDs) have attracted much attention owing to their good stability, low toxicity and excellent biocompatibility. In this work, CQDs doped with different contents of the element phosphorus (P) were prepared by a simple hydrothermal method using valine as a carbon source, triethylamine as a nitrogen source and different volumes of phosphoric acid as a phosphorus source. The average diameter and the surface charge could be regulated from 2.89 nm to 1.56 nm and +2.58 mV to +5.47 mV by increasing the content of the element P in these CQDs. Importantly, these CQDs showed effective bacterial inhibition against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The minimal inhibitory concentration (MIC) decreased from 0.71, to 0.51 to 0.18 mg mL−1 on E. coli and S. aureus with the increase of P element content. Furthermore, the morphologies of E. coli cells and S. aureus were damaged and became irregular upon treatment with these CQDs. The results of singlet oxygen (1O2) detection demonstrated that intracellular 1O2 was generated during the antibacterial process. We speculated that bacterial inhibition induced by these CQDs was accompanied by disruption of permeability and structural integrity, owing to strong electrostatic interactions between negatively charged bacteria and positively charged CQDs and production of singlet oxygen of CQDs. Together, this study indicates that the CQDs can be a candidate to treat resistant bacterial infections and may improve the understanding of killing pathogens by antibacterial CQD drugs.
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PubMed
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