CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Ming-Tao He,Peng Li,Yin-Hao Wang,Lei Du,Song Huang,Hai-Kui Zou,Guang-Wen Chu,Bao-Chang Sun
In this work, the synthesis of bisphenol S (4,4′-BPS) using reactive dehydration in a rotating packed bed (RPB) was studied. Firstly, orthogonal experiments were adopted to investigate the effects of different operating conditions on the yield and content of 4,4′-BPS in a stirred tank reactor (STR), including the mesitylene/phenol molar ratio ( μ ), reflux dehydration time ( t ), and stirring speed ( n ), in order to optimize the operating conditions in STR. Based on the study in STR, the effects of operating conditions, including rotation speed ( N ), feeding rate ( q ), and cycle number ( τ ), on the yield and content of 4,4′-BPS in RPB combined with STR (RPB-STR) were further investigated to optimize the operating conditions. The results indicated that compared to STR, the yield and content of 4,4′-BPS increased by 22.1% and 7.52% under the optimal operating conditions in RPB-STR, respectively. This work provides a novel route for efficient synthesizing 4,4′-BPS.
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CRYOGENICS
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2024
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IF 1.8
Tian Zhao,Yalin Zhao,Zhicong Miao,Tao Wang,Rongjin Huang,Laifeng Li
Epoxy resins are widely used in cryogenic applications due to their distinguished mechanical and electrical insulation properties. To avoid generating enormous amounts of waste that affect the environment and cause economic losses, covalent adaptable networks can be introduced into the epoxy structure to make the thermosetting network reversible. In this study, ester bond and hexahydro-s-triazine structure were adopted in epoxy structures. Two new degradable epoxy resins (HPBE and HPHE) with variances in the content of benzene rings were synthesized which were confirmed by FTIR and NMR. After curing, the thermal, mechanical, thermal conducting properties of the resulting materials were examined. The products exhibited tensile strength and flexural strength all above 120 MPa at 77 K, with glass transition temperature of 89.1 °C and 86.9 °C, respectively. Meanwhile, HPBE and HPHE demonstrated favorable thermal stability, with thermal conductivity comparable to that of the commonly used epoxy resin DGEBA. These resins could be degraded under mild conditions and demonstrated high hydrolysis efficiency (approximately 90 %). This investigation presented a viable method for the application of degradable thermosetting materials in cryogenic environments and the possibility for repairing of high-value equipment. 1
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Advanced Healthcare Materials
·
2024
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IF 10
Lixia Guo,Yafei Tian,Liang Zhou,Shiyue Kang,Chengwu Zhang,Wen Liu,Haipeng Diao,Liheng Feng
Phototherapy, including photodynamic therapy (PDT) and photothermal therapy (PTT), is a promising treatment approach for multidrug resistant infections. PDT/PTT combination therapy can more efficiently eliminate pathogens without drug resistance. The key to improve the efficacy of photochemotherapy is the utilization efficiency of non-radiation energy of phototherapy agents. Herein, a facile phototherapy molecule (SCy-Le) with the enhancement of non-radiative energy transfer is designed by an acid stimulation under a single laser. Introduction of the protonated receptor into SCy-Le results in a distorted intramolecular charge in the infected acidic microenvironment, pH ≈ 5.5, which in turn, enhances light capture, reduces the singlet–triplet transition energies (Δ E S1–T1 ), promotes electron system crossing, enhances capacity of reactive oxygen species generation, and causes a significant increase in temperature by improving vibrational relaxation. SCy-Le shows more than 99% bacterial killing rate against both methicillin-resistant Staphylococcus aureus and its biofilms in vitro and causes bacteria-induced wound healing in mice. This work will provide a new perspective for the design of phototherapy agents, and the emerging photochemotherapy will be a promising approach to combat the problem of antibiotic resistance.
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PubMed
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ACS Omega
·
2024
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IF 3.7
Yuqian Zhou,Yuhe Zhou,Renlong Liu,Guocan Zheng,Changyuan Tao,Benjun Xi
The resource utilization of phosphogypsum (PG) is the key to promote the green development of the phosphorus chemical industry. The natural environment and public safety are significantly threatened by the enormous volume of PG storage. In this study, Ca and S were successfully recovered from the PG via a multistep precipitation in the NaOH–BaCO3 system. The alkali solution can be recycled five times, with a first recovery ratio of about 97.9%, and the decomposition ratio of PG remained above 70% after five cycles. In addition, the recovery ratios of Ca and S in PG are 99.9 and 82.5%, respectively. The product of BaSO4 can be used as a weighting agent for oil and natural gas drilling mud. The BaSO4 can also be used as wave-absorbing materials, and its reflection loss value reaches 97.8% of the analytical purity BaSO4. This work provides a new idea for the efficient recycling of Ca and S in PG with an outstanding application prospect.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Rongzhong Yang,Qi Hao,Jianan Zhao,Cong Lei,Shujie Xue,Fadong Miao,Wenbing Tang,Qinghong Huang,Jing Wang,Yuping Wu
The sulfur-doped yttrium ruthenate pyrochlore catalysts was synthesized by simple hydrothermal method and exhibits excellent OER activity and stability under acidic conditions. Remarkably, the Y 2 Ru 2 O 7 S-0.17 catalyst reaches a current density of 10 mA cm −2 with only 237 mV and remains stable during 30 hours of electrolysis. In contrast, the original Y 2 Ru 2 O 7 and commercial RuO 2 require 282 mV and 365 mV, respectively. The introduction of sulfur into the internal lattice, replacing a portion of oxygen ions, creates vacancies that enhance the surface adsorption of oxygen. Furthermore, density functional theory calculations expose that S-doping alters the hybridization between the Ru 4d center and O 2p orbitals, significantly decreasing the energy barrier of the rate-determining step of the OER (O*--OOH*). Consequently, the intrinsic activity of the catalyst is greatly enhanced.
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WATER RESEARCH
·
2025
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IF 12.4
Chaowen Zhang,Shuo Liu,Haiying Zhang,Wenjing Li,Chuchu Hu,Zhixue Wang,Yuchuan Yang,Tuyizere Clarck,Jingmin Zhu
Microplastics are widespread in global aquatic ecosystems and have become key vectors for transporting environmental contaminants. In this study, we investigated the adsorption behavior of bisphenol S (BPS) onto polyethylene terephthalate (PET) fibers under laboratory conditions. The adsorption capacity of PET fibers for BPS was concentration-dependent and reached equilibrium after approximately 48 h. Adsorption increased with rising temperatures from 10 °C to 30 °C, and decreased with increasing salinity from 0 to 32. Both PET fibers and BPS accumulated significantly in oysters after one hour exposure. The concentration of PET fibers in oysters co-exposed to PET and BPS was significantly higher than that in oysters exposed to PET alone between 6 and 24 h of exposure. Additionally, after 168 h, BPS levels in both gills and gonads of the BPS-only group were 1.1 to 1.7 times higher than those in the multiple co-exposure groups, suggesting that combined exposures with PET fibers reduce BPS accumulation compared to BPS exposure alone. RNA-seq analysis revealed that differentially expressed genes in the combined exposure group were mainly enriched in biological processes related to oxidative stress, lipid metabolism, immune response, and energy production. Furthermore, compared to the BPS-only group, the number of differentially expressed genes associated with neurogenesis and reproduction was reduced under combined exposure. These findings suggest a potential antagonistic interaction between PET fibers and BPS in oysters.
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PubMed
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APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Jing Li,Mingkun Wu,Rui Tu,Jiacheng Li,Keliang Wang,Ju Guo,Yi Xie
The limited narrow spectral absorption and rapid recombination of photogenerated carriers in photocatalytic materials result in inefficient molecular oxygen activation and insufficient generation of reactive oxygen species (ROS), severely restricting the degradation efficiency of organic pollutants. Herein, a composite catalyst with broad visible-light responsiveness was fabricated via a facile solvothermal and room-temperature stirring strategy, where sheet-like Bi 4 O 5 Br 2 was encapsulated with W 18 O 49 nanowires. The as-prepared catalyst exhibited high concentrations of h + and O 2 − active species, achieving a 92 % degradation rate of ciprofloxacin (20 mg/L) within 60 min, alongside exceptional environmental tolerance and stability. Experimental and computational investigations confirmed the S-scheme charge transfer mechanism, which enhances carrier separation while preserving electrons and holes with strong redox capabilities. The localized surface plasmon resonance (LSPR) effect of W 18 O 49 synergistically promoted hot electrons and photogenerated electrons to activate O 2 , generating abundant O 2 − . This work proposes a novel design paradigm for efficient and stable visible-light photocatalysts, advancing solutions to emerging antibiotic pollutants in aquatic systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Chunyan Fan,Xuxin Song,Yao Tang,Zehao Zang,Yangyang Ren,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Xinghua Zhang
Designing catalysts that simultaneously optimize both hydrogen and oxygen evolution reaction (HER and OER) emerges as a critical materials challenge. Co(OH)₂ is recognized as an effective OER electrocatalyst, but the low HER activity limits its application in overall water splitting. In this work, we synthesized sulfur (S) and selenium (Se) doped Co(OH) 2 catalysts with significantly enhanced HER activity using an electrochemical deposition method. The S-Co(OH) 2 and Se-Co(OH) 2 catalysts own low HER overpotentials of 48 mV and 59 mV at 10 mA cm −2 . And they require 1.56 V and 1.64 V at the same current density for water splitting, the sustain stable performance for > 100 h at current densities (100 mA cm −2 ) show their practical durability. Density Functional Theory (DFT) calculations and experimental results reveal that non-metal doping induces electronic reconfiguration of Co and optimizes the ΔG H* value for intermediate formation, thus accelerating hydrogen generation and enhancing the intrinsic HER activity. This work presents an effective strategy for incorporating non-metal elements into transition metal-based catalysts, and provides insight to boost HER intrinsic activity and achieve bifunctional catalytic performance for water splitting.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Wei Cai,Jincheng Liu,Zewei Liao,Yijun Luo,Xiaoyan Xiang,Bingjie Li,Wenxin Yang,Yanxiong Fang
Overcoming limited charge separation and inefficient solar utilization remains critical for photocatalytic hydrogen evolution. This study addresses these challenges by constructing an organic-inorganic composite photocatalyst by integrating CdZnS nanoparticles with perylene-3,4,9,10-tetracarboxylic diimide (PDI) nanosheets via controlled assembly. Optimizing the PDI content yielded a remarkable hydrogen evolution rate of 7.09 mmol·g −1 ·h −1 under visible light irradiation, representing a 2.3-fold enhancement over pristine CdZnS. This superior photocatalytic performance originates from synergistic effects: exceptional light harvesting by PDI supramolecular structures, enhanced charge mobility via π-π conjugation pathways, and efficient charge separation with high redox potential preservation enabled by the S-scheme heterojunction mechanism. This work establishes a strategic paradigm for developing high-efficiency heterojunction photocatalysts through rational interface engineering.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Qi Chen,Cheng Liu,Rui Liu,Yidong Hou,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of 2D/2D MoS 2 /Bi 2 WO 6 S-scheme heterojunctions consisting of ultrathin MoS 2 nanosheets (MS, 1.6 nm) and ultrathin Bi 2 WO 6 nanosheets (BWO, 1.5 nm) were developed for photocatalytic degradation of ciprofloxacin. The samples with 5 % mass ratio of MS (5 %MS/BWO) exhibits the almost complete degradation of ciprofloxacin (≈100 %) under visible light. It is evidenced that the formation of S-scheme heterojunction with close interfacial interaction facilitates the photoinduced carrier separation and the generation of surface acid sites. The activation of ciprofloxacin molecules is realized through the coordinately interaction of C-N and C=O with the surface W sites. Moreover, the OVs in BWO side is a convenient pathway for activated of O 2 , embodying in the generation of •O 2 − and •OH under visible light over photocatalyst. Such an association of charge transfer mechanism with coordination activation shows the enhanced photocatalytic performance toward ciprofloxacin. This work provides a motivation which designs an S-scheme heterojunction photocatalyst with the ability to activate the specific group in molecules to comprehend the degradation of antibiotics.
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ACS Applied Nano Materials
·
2025
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IF 5.5
Changsong Chen,Xusheng Yang,Zhiyong Fu,Le Zhou,Bin Xu,Kaiming Zhang,Shengbin Zhou,Limei Zhou,Weidong Jiang
Traditional hydrogenation requires noble metal catalysts and harsh conditions. To overcome these intrinsic drawbacks, herein, sulfur-doped Co3O4–CuO/CNS bicomponent nanocomposites were prepared using S-modified chitosan (CNS) as a template via the precipitation method. The experimental results demonstrated that the incorporation of sulfur (S) significantly enhanced the synergistic effect of the Cu–Co-based bimetallic system, thereby improving catalytic activity. Notably, Co3O4–CuO/CNS-10 exhibited remarkable catalytic performance in the hydrolytic dehydrogenation of sodium borohydride, achieving a hydrogen generation rate (HGR) of 357.9 mL·min–1·g–1cat. Furthermore, Co3O4–CuO/CNS effectively catalyzed the tandem hydrogenation reduction of m-nitrobenzene (m-CNB) to m-nitroaniline (m-CAN) in the presence of sodium borohydride (NaBH4), as evidenced by an m-CAN yield of up to 99.80% under highly mild conditions. Also, Co3O4–CuO/CNS-10 displayed high chemoselectivity and regioselectivity for the reduction of various aromatic nitro compounds containing potential reactive functional groups. The doping of sulfur promotes the bimetallic Cu–Co synergistic effects accompanied by the increases of the Co2+/Co3+ ratio and enriches oxygen vacancy defects on the surface, thereby enhancing the catalytic activity of the screened heterogeneous catalyst. This work highlights the key role of sulfur and provides an innovative strategy for elevating the catalytic reactivity of bimetallic nanocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Xiaomeng Ni,Jingjing Liu,Fangxian Xu,Jing Zhang,Sai Jiang,Bijun Fang,Huafei Guo,Ningyi Yuan,Jianning Ding,Shuai Zhang
Doping the light absorber layer of antimony chalcogenides with extrinsic ions is an effective approach for improving their photovoltaic quality. These dopant ions generally reside at positions other than the crystal lattice or form an alloy (e.g., AgSb(S,Se) 3 ) with a poor device performance. Therefore, incorporating such ions into an antimony chalcogenide lattice such that there is a positive influence on device quality would be highly useful. Herein, doping of Nd 3+ for Sb 2 (S,Se) 3 is carried out via a modified hydrothermal deposition process. Notably, these ions are incorporated into the crystal lattice and migrate to the CdS/Sb 2 (S,Se) 3 interface after doping, which are characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry. Nd 3+ doping produces benign effects on the crystal orientation, film morphology, optoelectronic properties, and defect passivation of the Sb 2 (S,Se) 3 films. Consequently, all the photoelectrical parameters of Sb 2 (S,Se) 3 solar cells doped with Nd 3+ are enhanced, delivering a remarkable efficiency of 8.24 %. Furthermore, the best device stored in air only shows a slight decrease in efficiency in the 2400-h aging test. Overall, this study provides an effective doping strategy to improve the photovoltaic quality of Sb 2 (S,Se) 3 films.
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