Asian Journal of Organic Chemistry
·
2026
·Vol. 15
·期 5
·e70423
·
IF 2.3
Zhiqi Song,Xu Jia,Xiulian Wang,Jiaqi Zhang,Liuxue Zhang,Jiaolong Qiao,Lidan Yang
In order to enhance the separation efficiency of charge carriers and thereby increase the rate of photocatalytic hydrogen evolution, a novel heterojunction composite material, Mo/Co-MOF@g-C 3 N 4 , was synthesized by loading flower-like Mo/Co-MOF onto two-dimensional ultrathin g-C 3 N 4 nanosheets through the regulation of the energy band alignment position of the materials. The construction of this heterojunction was designed to modulate the carrier transfer pathway, thereby addressing the poor adsorption capacity and sluggish migration of photogenerated electron–hole pairs in photocatalytic processes. This modification led to a significant enhancement in photocatalytic hydrogen evolution efficiency. Experimental results demonstrated a remarkable hydrogen evolution rate of 2.96 mmol·g − 1 ·h − 1 for the composite material. This performance represents an 8-fold enhancement compared to the rate of 0.37 mmol·g − 1 ·h − 1 observed for the pristine ultrathin g-C 3 N 4 . Furthermore, the composite exhibited excellent stability, maintaining its high activity without significant degradation over multiple cyclic testing runs. The Mo/Co-MOF@g-C 3 N 4 composite demonstrates both high hydrogen production yield and robust stability in photocatalytic water splitting reactions. This work presents a promising and novel candidate for future research in photocatalysts for hydrogen generation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shuo Zhang,Chenxi Chang,Tong Xu,Qingyuan Zhang,Wenxia Zhao,Xiuling Cai,Zidan Li,Bin Zhu
An interface-engineered S-scheme BiOBr/CoFe-LDH heterojunction photocatalyst was fabricated via a facile one-pot hydrothermal method to boost CIP degradation. The crystal structure, morphology, optoelectronic properties and interfacial charge transfer behavior were systematically characterized by XRD, TEM, XPS, photoelectrochemical measurements and density functional theory (DFT) calculations. The optimized 5-BOB/LDH/PMS/Vis system achieved ∼90% CIP removal within 60 min for 20 mg L −1 CIP solution, with an apparent rate constant 1.7-fold and 11.3-fold higher than those of pristine CoFe-LDH and BiOBr, respectively. The catalyst exhibited excellent practical applicability: it retained 81.5% activity after 5 consecutive cycles, maintained high degradation efficiency over a broad pH range (4–11) and showed universal degradation capability toward tetracycline, rhodamine B, acetaminophen and sulfadiazine. Mechanistic studies revealed that the constructed S-scheme heterojunction not only suppressed charge carrier recombination but also upshifted the d-band center of Fe species, enhancing PMS adsorption and accelerating the synergistic redox cycle between Co and Fe active sites. This work provides a rational design strategy for high-performance PMS-activating photocatalysts and demonstrates great potential for the advanced treatment of antibiotic-containing wastewater.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Shi Li-Yuan,Tian Fu,Cao Cheng-Yin,Hu Kun,Zhu Xiao-Die,Li Xiao-Hong,Wang Sheng
Poly(phenylacetylene)s (PPAs) are one kind of important helical polymers with tunable main chain conformations. However, the preparation of near-infrared optically active helical PPAs remains a challenge. Here, we report a novel helical poly( m -terphenyl acetylene)s (PTPAs) bearing two chiral alkylamide pendants, which showed a stretched cis-transoid helix in solution or poly(methyl methacrylate) matrix with a broad optical activity range from the ultraviolet-visible (UV-Vis) to near-infrared regions. The effects of substituents, solvents, temperature, and acid/base additions on the helical conformation were carefully investigated. The substituent structure had little effect on the elongation but remarkably affected the main chain screw sense. The stability of this extended cis-transoid helix depends on the solvent applied and the temperature. Reversible conformational transitions between the one-handed cis-transoid helices and frustrated coil conformations can be achieved by the addition of trifluoroacetic acid and triethylamine. Furthermore, full-color circularly polarized luminescent materials can be prepared by virtue of their broad Cotton effects and chirality-selective absorption.
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ChemSusChem
·
2026
·Vol. 19
·期 12
·e70804
·
IF 5.9
Kening Xiang,Haoyu Wang,Yuhao Hong,Tao Liu,Cuizhu Li,Yared Daniel Reta,Yeshitla Tsegaw Gizaw,Dongfang Lu,Dong-Hau Kuo,Jinguo Lin,Xiaoyun Chen
Herein, a simple and environmentally benign synthetic strategy is developed to construct a hydrazine-regulated Bi/S co-doped CeVO 4 trimetallic sulfur-oxide photocatalyst (Bi/S-CeVO 4 ). The resulting material features abundant oxygen vacancy (Vo) defects and stabilized multivalent Ce 3+ /Ce 4+ and V 4+ /V 5+ states, which synergistically enhance photocatalytic hydrogen evolution reaction (PHER) performance under visible light irradiation. Band structure analyses indicate that Bi/S co-doping effectively modulates the electronic structure of CeVO 4 , leading to improved photocatalytic performance toward PHER. The coexistence of multivalent Ce 3+ /Ce 4+ and V 4+ /V 5+ species provides efficient electron-hopping pathways, facilitating photogenerated charge separation and transfer while prolonging carrier lifetime. In addition, Vo defects served as catalytic sites for water-molecule adsorption and activation, further accelerating surface reaction kinetics. Benefiting from these synergistic effects, the optimized Bi/S-CeVO 4 -3, featuring the highest electrochemically active surface area of 0.0015 cm 2 and Vo concentration of 24.5%, and suitable ratio of Ce 4+ /(Ce 3+ +Ce 4+ ) (41.8%) and V 4+ /(V 4+ +V 5+ ) (38.5%), delivers the highest PHER rate of 1514.7 μmol·h –1 , with an apparent quantum efficiency (AQE) x-ray diffraction of 15.28% at 420 nm. Moreover, the catalyst demonstrates excellent stability and durability. This work presents a feasible and effective strategy for electronic structure and defect engineering of CeVO 4 -based photocatalysts to achieve efficient solar-driven hydrogen evolution. Graphical Inspired by battery-material redox chemistry, hydrazine-regulated Bi/S co-doping constructs a defect-rich CeVO 4 sulfur-oxide with stabilized multivalent states, enabling a photocatalytic hydrogen evolution reaction rate of 1514.7 μmol·h –1 and an apparent quantum efficiency of 15.28% at 420 nm.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Xiaoxuan Ren,Hui Geng,Yue Sun,Shengjie Li,Guizheng Zou
Nanoparticles (NPs) are alternative chemiluminescence (CL) luminophores to molecular luminophores and are strongly anticipated to extend molecular luminophore-tagged commercial CL immunoassays (CLIA) with wavebands beyond the eye-visible region and sensitivity beyond the pg/mL level. Herein, a surficial bond-involved repetitive excitation strategy for near-infrared CL with enhanced photons per luminophore is proposed by exploiting l-methionine (l-Met)-capped gold NPs (AuNPs) as luminophores. The surficial Au–S bonds of l-Met@AuNPs can be involved in the procedure of NP core excitation via oxidation, and bring out defect-involved CL around 830 nm. Because there are plenty of Au–S bonds on every AuNP core, l-Met@AuNPs can be repetitively excited over a hundred times and give off greatly enhanced CL photons per luminophore than all molecular CL luminophores. CL of l-Met@AuNPs/(NH4)2S2O8 can directly enable automatic near-infrared CLIA for myoglobin (MYO) determination on in vitro diagnostic instruments, with a limit of detection of 10 fg/mL (S/N = 3), which significantly surpasses the threshold of molecular luminophores. This Au–S bond-triggered AuNP CL strategy not only offers an alternative to molecular CL strategies with improved sensitivity and to II–VI NP CL strategies with fewer toxic concerns, but also indicates that exploiting the surficial bond energy of NPs could be an alternative to designing NPs with unique morphology, structure, and composition in the CL domain.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yanfang Zhu,Dongdong Kang,Zhiyuan Huang,Guiyang Xu
Photocatalytic H 2 production and pollutant degradation using solar-driven processes are promising approaches for sustainable energy conversion. However, the reaction efficiency is inadequate due to rapid carrier (e -/ h + ) recombination and poor catalyst stability. In this work, we report a novel heterostructure comprising iridium-modified Cu-MOF coupled with sulfur-doped HfO 2 (S-HfO 2 ), termed as Ir-Cu-MOF/S-HfO 2 composite, to investigate photocatalytic H 2 production and bisphenol-A (BPA) degradation. Advanced characterization studies, such as X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM & TEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), and electron spin resonance (ESR), were used to explicate the structural, morphological, electronic, and charge transfer performances of the Ir-Cu-MOF/S-HfO 2 composite. Under LED-light irradiation, the Ir-Cu-MOF/S-HfO 2 photocatalyst displays a H 2 evolution rate of 12.98 mmol g -1 h -1 using triethanolamine (TEOA) as a sacrificial agent. Simultaneously, it achieves 96% degradation of bisphenol-A (BPA) within 120 min, with a rate constant of 0.018 min -1 , representing superior bifunctional photocatalytic activities. Characteristics studies suggest that the synergistic interaction between Ir-infused Cu-MOF active centres and defect-rich S-HfO 2 facilitates the efficient separation and migration of photogenerated charge carriers. Moreover, the Ir-Cu-MOF/S-HfO 2 photocatalyst exhibits good stability and reusability over prolonged cycles. This study provides valuable insights into the clear design of noble metal-modified MOF-based heterostructures and highlights their potential for integrated solar-driven hydrogen production and environmental pollutant abatement.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Dongfeng Sun,Jiaxin Liu,Yu Kang,Yanning Qu,Yuan Yu,Shukai Ding,Guohui Dong
The widespread application of TiO 2 in photocatalytic hydrogen (H 2 ) evolution is severely hampered by its wide bandgap and rapid charge carrier recombination. Herein, a well-defined yolk-shell TiO 2 @g-C 3 N 4 S-scheme heterojunction was rationally engineered via a facile peroxidation-assisted strategy to significantly enhance photocatalytic hydrogen evolution. The synthesis included stepwise fabrication of a TiO 2 @SiO 2 @g-C 3 N 4 dual-core–shell intermediate, followed by selective etching of the sacrificial SiO 2 interlayer to form the tailored hollow structure. This unique architecture enhances light harvesting via internal scattering, shortens carrier migration distance and facilitates charge separation relying on the spatially confined ultrathin g-C 3 N 4 shell. The optimized TCN-2 photocatalyst achieves a prominent H 2 evolution rate of 134 μmol·g −1 ·h −1 under visible light, which is 6.4 times that of pure TiO 2 . Systematic characterizations (XRD, XPS, TEM, UV–Vis DRS, PL, TRPL, photoelectrochemical and Mott-Schottky analyses) verify the successful heterojunction formation, efficient interfacial charge transfer and favorable internal electric field for S-scheme carrier migration. This work offers a controllable strategy for advanced yolk-shell heterostructures and highlights architectural engineering’s pivotal role in realizing photonic-electronic synergy for high-efficiency solar fuel generation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiayang Zhao,Gang Liu,Xinmei Liu,Limin Dong,Dongbo Wang,Fei Li,Yuewu Huang,Zhitao Yang,Wenlong Yang,Liancheng Zhao
The practical implementation of semiconductor photocatalysis is often impeded by three key challenges: restricted light absorption, rapid recombination of photogenerated charge carriers, and inadequate stability in complex aqueous environments. In this work, a g-C 3 N 4 /BiOCl heterojunction photocatalyst was successfully fabricated. The synergistic effects of its porous structure, oxygen vacancies, and Bi–N bonds significantly boost the photocatalytic performance. Photoelectrochemical analyses reveal that the heterojunction not only extends the optical absorption edge to the visible region but also enhances the photocurrent response and reduces charge transfer resistance, leading to efficient separation and transport of photogenerated carriers. Under irradiation with a 300 W xenon lamp equipped with a 420 nm cutoff filter, the g-C 3 N 4 /BiOCl heterojunction exhibited significantly enhanced photocatalytic activity in the degradation of Rhodamine B (RhB) and reduction of hexavalent chromium (Cr(VI)) relative to pristine g-C 3 N 4 and BiOCl. Notably, the g-C 3 N 4 /BiOCl-2 sample achieved 99.12% removal of 20 mg/L Cr(VI) within 25 min, with a reaction rate constant of 0.10098 min −1 —1.88-fold and 2.72-fold higher than those of pristine BiOCl and g-C 3 N 4 , respectively.Environmental adaptability studies revealed that this heterojunction exhibited optimal Cr(VI) reduction performance under acidic conditions (pH=3). Its photocatalytic reduction efficiencies in deionized water, tap water, river water, and industrial wastewater were 97%, 87.6%, 81.4%, and 73.1%, respectively, highlighting its strong practical applicability in diverse aqueous environments. Common ion influence experiments further confirmed that NH 4 + promotes the reduction process, while CO 3 2- and PO 4 3- inhibit the reaction due to the alkaline environment generated by hydrolysis. Cl - , SO 4 2- , and Ca 2+ had negligible effects. Cycling tests revealed that g-C 3 N 4 /BiOCl-2 maintained over 85% photocatalytic activity after five cycles, exhibiting superior durability compared to pure g-C 3 N 4 (11.1%) and BiOCl (39.7%). This work enhance the photocatalytic reduction of heavy metals in complex aqueous environments through the construction of a highly efficient and stable S-scheme heterojunction photocatalyst, thereby offering theoretical and experimental foundations for the degradation of industrial dye pollutants.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jinge Hao,Yongjin Li,Liang Xu,Yadong Liu,Yufan Wan,Zhaoyi Yin,Junhao Ma,Taizhong Xiao,Zhengwen Yang,Jianbei Qiu,Zhiguo Song
Lattice-matched hetero-phase interfaces suppress defect charge transport resistance. • Dual built-in fields boost the separation and migration of photogenerated carriers, and interfacial kinetics. • Rare-earth single atoms' 4f electrons tune active-site electron density and coordination for N 2 activation and C-N coupling. • Er/BiVO 4 -ZnCdS single atom twin S-scheme homojunction-heterojunction catalyst: urea rate 136.78 μmol·g -1 ·h -1 . Engineering twin S-scheme heterojunctions is a promising strategy for photocatalytic systems. Nevertheless, constructing such dual S‑scheme architectures with three distinct catalysts often induces lattice mismatch and weak interfacial coupling, which invariably erects formidable charge-transfer barriers that compromise deep N 2 activation kinetics and selective C-N coupling efficiency. Herein, a novel strategy based on rare-earth single-atom introduction to induce phase transformation and construct single-atom twin S‑scheme homojunction-heterojunction catalysts is developed. The lattice-matched hetero-phase interfaces minimize defect-induced charge transport resistance, whereas dual built-in electric fields cooperatively expedite photogenerated carrier separation and migration, and concurrently optimize interfacial charge transfer dynamics. Er single atoms possess a distinctive 4 f electronic configuration, which enables precise modulation of the electron density distribution and coordination microenvironment of catalytic active sites, conferring remarkable advantages in boosting N 2 activation and steering selective directional C-N bond coupling. Remarkably, the optimized catalyst achieved a urea yield rate of 136.78 μmol·g −1 ·h −1 with 95.82% selectivity. This study demonstrates a synergistic integration strategy combining single-atom engineering with phase-junction and heterojunction design for high-efficiency solar-to-chemical conversion. Download: Download high-res image (125KB) Download: Download full-size image A novel rare-earth single-atom strategy is developed to induce phase transformation and construct twin S-scheme homo-heterojunctions. Lattice-matched interfaces and dual built-in electric fields accelerate carrier separation, while unique 4 f electronic structures modulate active sites for efficient N 2 activation and C-N coupling. The optimized catalyst achieves a urea yield of 136.78 μmol·g −1 ·h −1 with 95.82% selectivity.
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NANO
·
2025
·
IF 1.1
Xiu Fan,Haonan Wang,Donghao Li,Shixuan Zhang,Yan Shi,Yuan Zhao,Fengxiang Li
Tetracycline (TC) is difficult to degrade and is widely used, seriously threatening the environment and human health. This paper employed the two-step hydrothermal synthesis process to combine the different loading of urchin-like In 2 O 3 with laminar g-C 3 N 4 . After a series of experiments, it was proved that the 10.0 wt.% In 2 O 3 /g-C 3 N 4 is the optimal ratio. Its decompose efficiency of TC could reach 86.1%, and the apparent rate constant of degradation was 0.01655 min −1 simultaneously. This result is attributed to the S-scheme heterojunction structure within the In 2 O 3 /g-C 3 N 4 composite material. Through this mechanism, useless electrons and holes were eliminated via recombination, while the highly reactive photogenerated electrons in the g-C 3 N 4 ’s CB and the holes in the In 2 O 3 ’s VB were reserved for photocatalytic reactions and generated a substantial quantity of reactive species (RSs) that effectively degraded TC. This work provides several useful insights for removing TC or other organic pollutants from the water environment.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yingli Zhang,Hailong Zhu,Huaiyang Zuo,Yaqi Hou,Shumin Zheng,Shiming Yang,Jing Wang,Bao Wang
As a potential high-safety and high-energy-density technology, lithium sulfide has been extensively studied as a cathode material for lithium–sulfur batteries under room temperature conditions. However, limited by its intrinsic characteristics of low electronic conductivity and high activation energy barrier, conventional Li2S cathodes struggle to overcome the activation energy barrier at low temperatures, resulting in scarce research on their application below zero. Specifically, studies on operation at −20 °C are nearly nonexistent. Herein, a synergistic strategy combining molybdenum carbide support adsorption and cobalt metal catalysis is proposed for low-temperature performance investigation. Via a lithiation reaction, Li2S@MoC–Co nanocomposites are fabricated by in situ synthesizing Li2S nanoparticles, introducing MoC as the support, and incorporating Co metal. When assembled into batteries with Li2S@MoC–Co as the cathode and metallic lithium as the anode, the activation energy barrier is reduced to 2.41 V at room temperature, exhibiting excellent electrochemical performance. A high initial discharge capacity of 1100 mAh g–1 is achieved at 0.1 C, and a discharge capacity of 430 mAh g–1 is retained after 200 cycles at 0.5 C. Even at −20 °C, Li2S is almost fully activated during the first charging cycle, delivering a discharge capacity of 360 mAh g–1 at 0.05 C. Moreover, a capacity retention rate of 92% is maintained after 300 cycles at 0.5 C. This work realizes high output and high-capacity retention of Li2S at −20 °C, providing a new paradigm for the development of low-temperature Li2S-based batteries.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
HaoTian Wu,WenYu Luo,EnZhou Liu,Bing Wang,LinYu Jiao,Zhuo Li,XiaoXun Ma
The performance of photocatalysts is often limited by charge recombination and sluggish kinetics at heterojunction interfaces. This study develops a multi-strategy interfacial modulation approach by constructing Bi S covalent bonds at the BiVO 4 /Mn 0.5 Cd 0.5 S(MCS) interface to serve as electron transport “bridges”, while simultaneously filling sulfur vacancies (V S ) in MCS with Ti atoms to eliminate recombination centers. This dual optimization of interfacial charge dynamics is realized in a BiVO 4 /MCS/TiO 2 (BMT) ternary system. The design facilitates an efficient dual S-scheme heterojunction that, driven by an interfacial built-in electric field, enables highly efficient separation of photogenerated carriers while maximizing redox capability. Under visible-light irradiation, the composite achieves a degradation rate of 89.51% for norfloxacin within 30 min, along with excellent cycling stability. Combined spectroscopic analysis and theoretical calculations confirm that the Bi S bonds significantly reduce the interfacial charge-transfer barrier, while the Ti-V S structure effectively suppresses carrier recombination. The synergy between these two mechanisms is key to constructing an efficient S-scheme charge-transfer pathway. This work provides a clear strategy for designing high-performance photocatalytic systems through the cooperative integration of interfacial bonding and defect engineering. We developed a TiO 2 /Mn 0.5 Cd 0.5 S/BiVO 4 ternary system with dual interfacial modulation using Bi S covalent bonds as electron bridges and Ti filling of sulfur vacancies to construct a dual S-scheme heterojunction that suppresses charge recombination and enhances redox capacity. This synergy enables efficient norfloxacin degradation and stability under visible light. Download: Download high-res image (139KB) Download: Download full-size image
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