RARE METALS
·
2024
·Vol. 43
·期 5
·1999-2014
·
IF 9.6
Li Mei,Wang Jing-Zhi,Jin Zhi-Liang
In the process of photocatalytic water cracking, the migration rate and utilization rate of photogenerated charges determine the hydrogen evolution performance of the catalyst. In this paper, a carbon isotope superconducting material graphdiyne (GDY) is prepared by mechanical ball milling and introduced into the S-scheme heterojunction Zn 0.5 Co 0.5 S/MoS 2 inorganic system. In terms of hydrogen evolution kinetics, GDY acts as an electron bridge, not only accelerating the migration of photogenerated carriers but also improving the utilization of photogenerated charges. Morphologically, the large two-dimensional layer provides more loading and anchoring points for Zn 0.5 Co 0.5 S/MoS 2 , which increases the number of active sites. The ternary composite catalyst 20%GDY/Zn 0.5 Co 0.5 S/Mo 2 S (20-GCSM) generates 69.94 μmol of hydrogen (5 h) in triethanolamine solution. It is 2.97 and 1.80 times higher than Zn 0.5 Co 0.5 S and Zn 0.5 Co 0.5 S/MoS 2 , respectively. After the cyclic experiment, it still has stable hydrogen evolution performance after standing for 24 h (under dark conditions). In addition, the potential mechanism of photocatalytic hydrogen evolution is demonstrated through in-situ X-ray photoelectron spectroscopy. This work provides a reference for further research in the field of introducing carbon materials into photocatalytic systems and improving the utilization of photogenerated charges. Graphical abstract
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DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 9
·2778-2784
·
IF 4.029
Guang-mao Li,Qiong Liu,Kui Wu,Zhi-hua Yang,Shi-lie Pan
In view of their inherent defects for commercial infrared nonlinear optical (IR NLO) materials, exploration for new IR NLO materials with excellent performance is an imperative and meaningful work. Herein, we report the successful design and synthesis of two metal-mixed chalcogenides containing divalent cations with d10 electronic configuration: Na2CdGe2S6 and Na2CdGe2Se6. Both of them crystallize in the polar Cc space group and exhibit three-dimensional tunnel structures constructed by the CdQ4 tetrahedra and ∞[GeQ3]n chains with Na+ located in the tunnels. Furthermore, an interesting space group transformation between the monoclinic (Cc) and tetragonal (I4/mcm) systems from Na2CdGe2Se6 to Na2ZnGe2Se6 was discovered, which may arise from the different connection types of their building blocks (more flexible corner-sharing type in Cc while tightly edge-sharing type in I4/mcm). Remarkably, they exhibit type-I phase-matching abilities and large second harmonic generation (SHG) responses (0.8 and 2 times that of benchmark AgGaS2 at 2.09 μm fundamental light). Notably, Na2CdGe2S6 satisfies the essential requirements (coexistence of large NLO response and high laser damage threshold) as one excellent IR NLO material. The structure–property relationship has also been investigated through theoretical calculations and the results indicate that the origin of their NLO effects can be attributed to CdQ4 and GeQ4 units.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Xiaoxu Cui,Zherui Wan,Zhonghao Li,Fengxia Wang,Pengshuai Wei,Guang Yang
Herein, intelligent N, S-doped fluorescent carbon dots (N, S-CDs) were constructed by using l -cysteine and carboxymethyl cellulose (CMC) polymer as precursors through a one-step hydrothermal method. The designed N, S-CDs displayed strong fluorescence (FL) emission with a FL quantum yield of 44.48 % and could be utilized for the quantitative tracing of TCs and Al 3+ via the “On-OFF-ON” FL transition with wide linear detection range (1.66–104.5 μM for TCH, 1.66–163.2 μM for OTC, 1.66–69.5 μM for DOX and 33–104.3 μM for Al 3+ ). The detection limits (LODs) of TCH, OTC, DOX and Al 3+ were calculated to be 53.02 nM, 95.61 nM, 41.87 nM and 57.69 nM, respectively. On the basis of the FL “On-OFF-ON” strategy, multiple logical gate operations including “NOR” and “INHIBIT”, were constructed successfully. Additionally, N, S-CDs uploaded to hydrogen bars were utilized for the recognition of TCs and Al 3+ in a portable manner, which revealed great application potential in the field of anti-counterfeiting and encryption.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Ze Liu,Yadong Hu,Chengkai Li,Zhenyu Zhang,Tingzhe Shen,Danni Zeng,Rongfeng Guan,Changjian Zhou,Pengyu Dong
Photocatalysis technology can degrade organic pollutants in wastewater, improving the ecological environment and protecting biodiversity. The BiVO 4 stable chemical properties of BiVO 4 make it a robust candidate for photochemical applications. Moreover, its broad light absorption spectrum and optimal band structure further enhance its potential, driving widespread research interest. The introduction of the eco-friendly biperovskite Cs 2 AgBiBr 6 enhanced BiVO 4 ′s surface area and visible light absorbance. Simultaneously, the doping process introduces impurities that modify charge transfer pathways, thereby enhancing the separation efficiency of photogenerated electron-hole pairs. When contrasted with pure BiVO 4 , the W-BiVO 4 /Cs 2 AgBiBr 6 composite demonstrates superior surface area characteristics and exhibits stronger absorption within the visible light spectrum. Within 40 min after exposure to visible light, the efficiency of W-BiVO 4 /Cs 2 AgBiBr 6 photocatalyst to degrade ofloxacin (OFX) and meloxicam (MEL) was 93.15 % and 92.70 %, respectively. Based on the toxicity analyses and antimicrobial assays simulated by the software, no highly toxic substances were found in the degradation intermediate products of OFX and MEL. The catalysts’ energy band structure and photoelectrochemical properties showed that W-BiVO 4 /Cs 2 AgBiBr 6 followed the S-scheme heterojunction charge transfer mechanism. By integrating BiVO 4 with other semiconductors in the form of S-scheme heterojunctions, this study explores a strategy that may effectively improve photocatalytic efficiency, particularly in pollutant degradation applications.
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Drug Metabolism and Pharmacokinetics
·
2019
·
IF 1.874
Yang Zhang,Chen Su,Jinxiu Lei,Lu Chen,Haihong Hu,Su Zeng,Lushan Yu
Mandelic acid (MA) is generally used as a biomarker of the exposure of styrene , which is classified as a class of hazardous environmental pollutants, and also used as an important chiral intermediate in pharmaceutical industry. The previous studies have found the excretion of phenylglyoxylic acid (PGA) in human and rat, a metabolite of MA, was mainly from S- MA rather than R -MA. The metabolic mechanism, however, is not clear. In order to explore the possible metabolic mechanism, the enzyme types involved in the stereoselectivity metabolism of MA were firstly studied, and then human and rat long-chain 2-hydroxy-acid oxidase 2 (HAO2) were recombinantly expressed to study the metabolic profiles of S- MA and its analogues. The results indicated that HAO2 might catalyze the stereoselectivity metabolism of S- MA in rats. Human HAO2 ( h HAO2) and rat HAO2 ( r HAO2) isozymes β 1 and β 2 were successfully cloned and expressed with high purity and good enzyme activities. The enzyme kinetic profiles of these enzymes were different for S- MA and analogues. The order of catalytic efficiency for h HAO2 and r HAO2, however, was reverse. It might be relevance to the difference in active amino acid residues and loop 4 in human and rat L-2-hydroxy acid oxidase isozyme B crystal structures.
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Journal of Energy Storage
·
2025
·
IF 9.8
Ju-Wen Su,Wei-Wei Yang,Jia-Chen Li,Liang An,Bo-Wen Zeng,Sheng-Song Xia,Zhi-Guo Qu
Rational electrode design unlocks the kinetic limitations of vanadium redox flow battery (VRFB). Herein, we present a one-step electrochemical oxidation strategy under mild acidic conditions to fabricate N-S co-doped graphite felt (GF@N-S) electrodes. This innovative approach achieves simultaneous in situ sulfonation and amination on carbon surface, constructing a hierarchical porous architecture with dual-active sites—a previously unreported configuration for VRFBs. Distinguished by its simplicity, scalability, and metal-free, our method circumvents cost limitations while suppressing hydrogen evolution side reactions. The GF@N-S electrode exhibits a remarkable triple synergy: (1) N-S co-doping significantly reduces charge-transfer resistance, (2) an optimized pore architecture enhances mass transport, and (3) a tailored electronic structure dramatically accelerates reaction kinetics. As a result, the electrode achieves remarkable energy efficiency of 85.8 % at 300 mA cm −2 and 75.0 % at 500 mA cm −2 , outperforming even state-of-the-art metal/carbon-nanomaterial hybrids. Notably, it exhibits exceptional stability with negligible active-site degradation over 1000 cycles. This work establishes a transformative paradigm for non-metal electrode engineering, seamlessly integrating atomic-scale doping control with industrial-scale manufacturability, and propelling the development of sustainable, high-performance energy storage systems.
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ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
·
2025
·
IF 2.8
Pi Duan,Li Xiang,Xu Zitian,Wang Peitong,Liang Zhiying,Li Bingying,Guo Yafen,Huang Yongsi,Song Xiaohong,Wang Junjie,Wang Xuegeng
Due to the known adverse effects of bisphenol A (BPA), bisphenol F (BPF) and bisphenol S (BPS) have been widely adopted as substitutes. However, they are now detected at significant levels globally, often at levels rivaling or exceeding those of BPA, raises concerns regarding their potential ecological and health risks. Our previous work indicated that BPS exhibits lower toxicity than BPF in Chinese medaka (Oryzias sinensis). To validate this, we compared their toxicity in Japanese medaka (Oryzias latipes) using both acute and developmental exposure tests. In the 96-hr acute test, embryos exposed to concentration gradient showed a BPF median lethal concentration of 128 mg/L, while BPS exposure resulted in high survival even at the highest concentrations. Based on the observed acute toxicity, we investigated the underlying mechanism of BPF and evaluated vitamin C rescue. Vitamin C treatment effectively improved embryos survival rates. Subsequently, in the 15-day developmental exposure, 2 μg/L BPF significantly increased yolk sac edema and malformation rates. Bisphenol exposure did not show concentration-dependent malformation increases. Transcriptomic analysis revealed BPF induced more differentially expressed genes (DEGs) than BPS at the tested concentrations (0.02, 0.2, 2 μg/L): 177, 14 and 24 DEGs were identified in BPF-treated groups, respectively. In contrast, only 4, 2, and 12 DEGs were detected in the corresponding BPS-treated groups. Further analysis of the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathways enrichments provided further insights into the potential toxicological mechanisms of BPF. This study provides a comparative toxicity assessment of BPF and BPS, elucidates BPF's acute and developmental toxicity pathways, and offers toxicological data for risk assessment and regulation, which also provides a direction for in-depth research on toxicity mechanisms.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haoqiang Zhang,Fuying Zhu,Tao Song,Yisong Ju,Congzhong Yang,Tianshu Zhang,Jiang Du,Liang Shi,Qiuling Yue,Hui Wei,Xiaozhi Zhao
Serotonin (5-hydroxytryptamine, 5-HT) is a crucial neurotransmitter, the abnormal levels of which are closely associated with various neuropsychiatric disorders and male reproductive dysfunctions. In this study, a sulfur-doped Fe–N–C single-atom nanozyme (S@Fe-CNx) was successfully synthesized, and its oxidase-like activity and catalytic mechanism were systematically investigated. The experimental results indicate that sulfur doping significantly enhanced Fe-CNx oxygen activation capacity and catalytic kinetics by effectively optimizing the electronic structure of the FeNx active centers. Leveraging its superior oxidase-like activity, we developed a H2O2-free colorimetric sensing method for the highly sensitive and selective detection of 5-HT. The method exhibited a good linear relationship between absorbance and 5-HT concentration in the range of 40 ng/mL to 10 μg/mL, achieving a low limit of detection of 6.0 ng/mL. The successful application of this method for detecting 5-HT in human serum samples demonstrates its great potential for practical use. Furthermore, we established a smartphone-based colorimetric detection platform that quantified 5-HT by correlating its concentration with the grayscale intensity of standard solution images captured by a smartphone. This approach provides a facile strategy for developing point-of-care testing platforms.
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Materials Horizons
·
2025
·
IF 10.7
Yihao Duan,Haihua Wang,Guiqiang Fei,Yu Wang,Liyu Sun
Modification of graphitic carbon nitride (g-C3N4) with semiconductor nanomaterials has been widely investigated as an effective method to enhance its photocatalytic activity. However, the construction of efficient g-C3N4-based heterojunction photocatalysts via an environmentally benign method remains critical. Herein, a two-dimensional (2D) few-layered MoS2/S-doped g-C3N4 hierarchical heterojunction was successfully synthesized by a simple strategy via combining small molecule-assisted liquid exfoliation, calcination and hydrothermal strategy, which was subsequently utilized for photocatalytic formaldehyde removal. The evaluation of the photocatalytic degradation reaction showed that the as-prepared 2D/2D MoS2/S-doped g-C3N4 photocatalysts exhibited superior photocatalytic activity compared to pristine g-C3N4 and S-doped g-C3N4 alone, which was attributed to the intimate interface and rapid charge transfer pathways. This heterojunction structure suppresses the excited electron–hole pair recombination within g-C3N4, which optimally enhances the photodegradation activity owing to high electron–hole pair separation efficiency. The few-layer MoS2 nanosheets play an irreplaceable role due to their unique molybdenum–sulfur atomic arrangement, thereby displaying the superior electronic properties of few-layer or even monolayer nanosheets, which make them an important transfer medium for photoexcited electrons. Meanwhile, S doping effectively modulates the band gap of g-C3N4 and introduces sufficient structural defects to inhibit electron–hole recombination. Moreover, the synthesis employs efficient and non-hazardous reagents, and the resulting catalysts exhibit outstanding stability and recyclability for pollutant degradation.
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Processes
·
2025
·Vol. 13
·期 11
·3652
·
IF 2.8
Kai Li,Rongguo Sun
Mercury (Hg) contamination in water and soil poses severe ecological and human health risks, yet conventional sorbents often suffer from limited capacity, selectivity, and stability. Here, we report a bifunctional porous organic polymer (AMTD-TCT) rationally constructed by covalently crosslinking 2-amino-5-mercapto-1,3,4-thiadiazole with trichlorotriazine, thereby integrating abundant sulfur and nitrogen coordination sites within a stable mesoporous framework. AMTD-TCT exhibits an ultrahigh Hg(II) adsorption capacity of 1257.7 mg g−1, far exceeding most reported porous sorbents. Adsorption follows monolayer chemisorption, governed by strong S–Hg and N–Hg coordination and Na+/Hg2+ion exchange, while hierarchical porosity ensures rapid diffusion and efficient utilization of active sites. The polymer maintains robust performance over a wide pH range and demonstrates strong retention with minimal desorption, underscoring its environmental durability. These findings highlight AMTD-TCT as a highly effective and scalable platform for Hg(II) remediation in complex aqueous–soil systems and illustrate a generalizable molecular design strategy for developing multifunctional porous polymers in advanced separation and purification technologies.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 33
·期 1
·315-321
·
IF 7.2
He Shengzhi,Sun Chunwen
Heteroatom-doped carbon is considered a promising alternative to commercial Pt/C as an efficient catalyst for the oxygen reduction reaction (ORR). This study presents the synthesis of iron-loaded, sulfur and nitrogen co-doped carbon (Fe/SNC) via in situ incorporation of 2-aminothiazole molecules into zeolitic imidazolate framework-8 (ZIF-8) through coordination between metal ions and organic ligands. Sulfur and nitrogen doping in carbon supports effectively modulates the electronic structure of the catalyst, increases the Brunauer–Emmett–Teller surface area, and exposes more Fe–N x active centers. Fe-loaded, S and N co-doped carbon with Fe/S molar ratio of 1:10 (Fe/SNC-10) exhibits a half-wave potential of 0.902 V vs. RHE. After 5000 cycles of cyclic voltammetry, its half-wave potential decreases by only 20 mV vs. RHE, indicating excellent stability. Due to sulfur’s lower electronegativity, the electronic structure of the Fe–N x active center is modulated. Additionally, the larger atomic radius of sulfur introduces defects into the carbon support. As a result, Fe/SNC-10 demonstrates superior ORR activity and stability in alkaline solution compared with Fe-loaded N-doped carbon (Fe/NC). Furthermore, the zinc–air battery assembled with the Fe/SNC-10 catalyst shows enhanced performance relative to those assembled with Fe/NC and Pt/C catalysts. This work offers a novel design strategy for advanced energy storage and conversion applications.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yong Qin,Wenjing Duan,Mingxia Tian,Lili Huang,Hui Bai,Jie Gu,Jianhui Jiang
The presence of residual azo dyes, such as Orange II, and organic antibiotic pollutants, such as tetracycline hydrochloride, in water and soil environments is a growing global concern. Conventional water treatment technologies often show limited effectiveness in removing these contaminants. To overcome these challenges, this study proposes a method to modify triazole using ammonium chloride and presents the successful construction of a carbon nitride/indium sulphide (C 3 N 5 /In 2 S 3 ) photocatalyst with nitrogen–sulphur dual vacancies using an in situ growth approach. Systematic characterisation and evaluations of the structure and performance of the material revealed that the modified C 3 N 5 exhibited significantly enhanced crystallinity and formed an intimate 2D/2D interfacial structure with In 2 S 3 . Coupled with an S-scheme heterojunction, the nitrogen–sulphur dual vacancies jointly enhanced the capacity for light absorption, improved the separation efficiency of charge carriers, and optimised the redox potential. When exposed to a 300 W xenon lamp, the degradation rate constants of the C 3 N 5 /In 2 S 3 catalyst for Orange II and tetracycline hydrochloride were 11.51 and 16.62 times that of the singly modified C 3 N 5 and 3.91 and 1.92 times that of pure In 2 S 3 , respectively, demonstrating significant photocatalytic synergy. The C 3 N 5 /In 2 S 3 catalyst maintained good stability, with its degradation efficiency decreasing by only 7.6 % after four consecutive cycles. Moreover, it adapted to a wide pH range, ionic environments, and sunlight exposure, indicating its potential for applications in real water bodies. Provides innovative design principles and experimental evidence for developing highly efficient S-type heterojunction photocatalysts with dual vacancy regulation mechanisms, paving the way for expanded environmental remediation applications.
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