JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Huimei Pan,Baiyang Chen
Although UV and/or VUV tandem I – are often proposed as advanced reduction processes (ARPs) to eliminate micropollutants by generating e aq – , the fate of I – and its byproducts formation remain to be explored. Therefore, this study investigated the iodine species evolution during UV/I – and UV/VUV/I – processes under different influencing factors. Results show that UV/VUV oxidized most of I – to IO 3 – whereas UV only oxidized a portion of I – to intermediate reactive iodine species (RISs, including I 2 , HOI, and I 3 – ); meanwhile, substantial H 2 O 2 was generated only in UV/VUV/I – process but not in UV/I – process, proving that UV/VUV owns stronger oxidation ability than UV alone. Spiking I – into water exerted triple-sided effects by consuming •OH, generating e aq – , and shielding light, thus complicating the systems. Holistically, increasing pH or decreasing dissolved oxygen converted oxidizing environment into reducing condition and caused less RISs formation, especially for UV/VUV/I – . For oxyhalides , neither UV/I – nor UV/VUV/I – degraded ClO 4 – . While UV/I – cannot remove ClO 3 – , UV/VUV/I – reduced ClO 3 – to Cl – . Expectedly, both UV/I – and UV/VUV/I – reduced BrO 3 – to Br – more efficiently than UV and UV/VUV, confirming that I – can enhance the reduction capacities of UV/VUV and UV technologies .
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Journal of Materials Chemistry C
·
2024
·Vol. 13
·期 1
·295-305
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IF 5.7
Yanan Gao,Jingjing Wang,Jingxuan Yang,Yajie Wang,Wenjuan Tian,Bin Liu
Nitrogen-rich graphitic carbon nitride (g-C3N5) has garnered significant attention in photocatalytic hydrogen production due to its unique physicochemical properties. However, g-C3N5 faces persistent challenges stemming from rapid carrier recombination. In this study, we successfully synthesized a Pd/C3N5-K,I photocatalyst through sequential doping of non-metallic heteroatoms and metal nanoparticles. The Pd/C3N5-K,I photocatalyst demonstrates a remarkable enhancement in the photocatalytic H2 evolution rate (2.9 mmol g−1 h−1), approximately 14 times higher than that of pure g-C3N5 (0.2 mmol g−1 h−1). Characterization and calculation analyses reveal that iodine doping into the g-C3N5 skeleton leads to the formation of planar C–I bonds, facilitating C3N5 layer electron–hole pair separation. The subsequent insertion of Pd nanoparticles between the layers leads to electron accumulation on C3N5-K,I, while resulting in hole concentration on Pd nanoparticles, thereby facilitating thorough spatial separation of electron–hole pairs. The strategic co-doping of iodine and palladium nanoparticles effectively restrains carrier recombination of g-C3N5 by connecting intra- and inter-layer interactions. This study constitutes a novel conceptual framework for CN-based photocatalysts, offering a promising approach to improve their performance in hydrogen production applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinrong Li,Shuliang Chen,Zihui Dai,Xianzhi Hu,Futing Zi
The selective recovery of gold ions from gold leaching solutions limits the industrial application of the copper-ammonia (Cu 2+ –NH 3 )-thiosulfate system. Here, the influence of the carbon chain length of organic phosphines on the selective recovery of gold ions was studied, and an extractant (trihexylphosphine, THP) that is suitable for the selective recovery of gold ions from a Cu 2+ –NH 3 -thiosulfate leaching solution was screened. The selectivity of organic phosphines with different carbon chain lengths for gold ions was C 8 = C 6 > C 4 > C 3 > C 2 , and when the number of carbon atoms in a single carbon chain was at least six, the selective recovery of gold ions from the Cu 2+ –NH 3 -thiosulfate solution was realized. THP completely recovered low concentration gold ions (6.73 mg/L) in the Cu 2+ –NH 3 -thiosulfate gold leaching solution regardless of the pH. The mechanism of gold ion extraction into the organic phase mainly involved ligand exchange between THP and [Au(S 2 O 3 ) 2 ] 3− . Job’s method and density functional theory calculations confirmed that the composition ratio of the complex formed by THP and Au was 2:1 at the practical and theoretical levels, respectively. Finally, Multiwfn and VMD were used to visually predict the possible reaction sites in THP. This study provides an exact method for the selective recovery of gold ions from thiosulfate-based gold leaching solutions, which will promote the development of thiosulfate-based gold leaching systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shuang Chen,Qiule Zhao,Yangchun Mo,Xiaopeng Wei,Jilin Wang,Guoyuan Zheng,Fei Long
Organic-inorganic hybrid perovskites have attracted wide attention because of their low cost, high photoelectric conversion efficiency and simple production process. Diisopropylamine was innovatively employed, in this paper, as the A-site organic ligand for bismuth-based halide organic-inorganic hybrid crystals. [(CH 3 CH 2 CH 2 ) 2 NH 2 ] a Bi b X c (X = Cl, Br and I) crystals were synthesized by a solvent evaporation method. All three crystals belong to the P2 1 /n space group. Among them, [(CH 3 CH 2 CH 2 ) 2 NH 2 ]BiBr 4 and [(CH 3 CH 2 CH 2 ) 2 NH 2 ]BiI 4 have one-dimensional chain structures, and [(CH 3 CH 2 CH 2 ) 2 NH 2 ] 2 Bi 2 Cl 8 belongs to a zero-dimensional structure. The band gap can be adjusted between 3.04 eV and 1.61 eV by the properties of halide ligands, and the good thermal stability of the three crystals are 203°C, 258°C and 291°C. Moreover, [(CH 3 CH 2 CH 2 ) 2 NH 2 ]BiI 4 thin films were prepared by the one-step solution spin-coating as a light absorbing layer. The band gap of thin films is 1.97 eV. The maximum power conversion efficiency of the device is 0.0271 %. Therefore, this organic-inorganic hybrid compound with a suitable band gap and high stability is expected to become a potential candidate material for photoelectric devices.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenjing Hou,Mengna Guo,Tian Sun,Yaoming Xiao,Huan Bi,Yuxi Xu,Gaoyi Han
The grain boundary defects related non-radiative recombination, I − migration, and lead leakage problems are the foundational and fundamental aspects for the perovskite solar cells. Herein, covalent triazine frameworks (CTFs) are introduced into the perovskite film to address these problems. CTFs can passivate the uncoordinated Pb 2+ defects at grain boundary and reduce the lead leakage based on the coordination interaction between nitrogen atoms in triazine ring and Pb 2+ . CTFs can also inhibit the I − migration and reduce the I − vacancy defects based on the anion-π interaction between electron-deficient triazine ring and I − . Benefited from the passivated grain boundary defects and inhibited I − migration by CTFs, the modified target device achieves a power conversion efficiency of 23.05 % with improved humidity stability and thermal stability. Therefore, this work lays the foundation for obtaining effective, stable, and environmentally friendly perovskite solar cells.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiaolei Zhao,Ya Chen,Lu Yu,Zhixiang Xu,Zhonghui Han,Jinxing He
Due to the globalized supply of food and rapid development of the food industry, food contamination has become a leading cause of food safety problems. In this study, a fluorescent sensing system for the fast and sensitive analysis of Sudan I was developed based on hollow molecularly imprinted polymers and a fluorescent encoding technique by using CsPbX 3 perovskite quantum dots as the fluorescent elements. The introduction of hollow structure provided a high loading capacity, faster encoding efficiency, and shorter detection time. After loading Sudan I, the fluorescent intensity was obviously quenched. Under the optimized detection conditions, this analysis method achieved good linearity in the range of 0.1–300 μg L −1 , a limit detection of 0.05 μg L −1 , and spiked recoveries of 94.91 %–105.36 % in food samples. The whole detection process can be completed within 10 min. Importantly, this work also provided a smartphone-assisted intelligent detection platform for the visual and real-time analysis of Sudan I.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhaoxin Huang,Shasha Zhang,Pengfei Zhu,Ming Duan,Yuling Jiang,Yu Chen
The BiOIO 3 /Bi 2 WO 6 binary catalyst was prepared by hydrothermal method, and a Bi 0 /I − -BiOIO 3 /Bi 2 WO 6 all-solid-state Z-scheme heterojunction composite catalyst with Bi 0 deposition and I-doping was prepared by further reducing it with NaBH 4 as reducing agent. When the content of BiOIO 3 is 20 wt% and n(NaBH 4 ): n(BiOIO 3 + Bi 2 WO 6 ) = 0.3, Bi 0 /I − -BiOIO 3 /Bi 2 WO 6 has the best photocatalytic activity. Under the optimized reaction conditions (catalyst dosage 1.0 g/L, antibiotic initial concentration 20 mg/L), the degradation efficiency of oxytetracycline (OTC) reached 83.56 % after 60 min reaction under visible light, and its pseudo-first-order reaction rate constant was 0.02431 min −1 , which was 2.56 times and 3.94 times that of pure Bi 2 WO 6 and pure BiOIO 3 , respectively. The characterization results show that the main reasons for the improvement of the activity of Bi 0 /I − -BiOIO 3 /Bi 2 WO 6 are the formation of heterojunction in the catalyst, the surface plasmon resonance (SPR) effect generated by Bi 0 and the impurity energy level introduced by I-doping, which jointly promote the separation of photogenerated electron-hole pairs (e − -h + ) in the catalyst and enhance the absorption capacity of the catalyst to visible light. The intermediates produced during the reaction were analyzed by high performance liquid chromatography-mass spectrometry (HPLC-MS). Two possible pathways for the degradation of OTC by Bi 0 /I − -BiOIO 3 /Bi 2 WO 6 were proposed. Finally, the electron transfer mechanism of Bi 0 /I − -BiOIO 3 /Bi 2 WO 6 all-solid-state Z-scheme heterojunction was proposed based on the test results of Tauc-plot curve and M–S curve.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Gao Feiyue,Zhou Chuncai,Cao Yachuan,Yu Yue,Li Yunfei,Liu Guijian
As a highly toxic rare metal, the removal of thallium (Tl) from wastewater has been widely investigated, and adsorption is considered one of the most promising treatment technologies for Tl-containing contaminated water because of its cost-effectiveness, convenience, and high efficacy. In this work, coal tar residue (CTR)-based porous carbon was synthesized through K 2 FeO 4 activation, and applied in adsorbing Tl(I). K 2 FeO 4 could synergistically produce porosity and load iron oxide on the produced porous carbon surface because of the catalytic cracking and oxidative etching during the activation of CTR. The adsorbent was synthesized at 800 ℃ with a mass ratio of K 2 FeO 4 /CTR being 3 (PC 3–800 ) showed optimal Tl(I) adsorption performance. The removal efficiency and distribution coefficient of PC 3–800 were above 95 % and 10 4 mL/g, respectively, in a wide pH range (4−10). Furthermore, the selection and reusability of PC 3–800 were favorable. The adsorption was a spontaneous, exothermic, and entropy increase process. The adsorption process was dominated by electrostatic attraction, surface complexation, and surface oxidation . The results suggested that removing Tl(I) from contaminated water via CTR-based porous carbon was feasible.
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FREE RADICAL BIOLOGY AND MEDICINE
·
2024
·
IF 7.1
Qi Wei,Fuxia He,Jiangyan Rao,Xiaoxia Xiang,Li Li,Hongyi Qi
Given the substantial risks associated with ultraviolet B radiation (UVB)-induced solar dermatitis, enhancing current strategies to combat UVB regarding skin diseases is imperative. The cross-talk between ferroptosis and inflammation has been proven to be an essential factor in UVB-induced skin inflammation, whereas detailed process of how their interaction contributes to this remains unclear. Therefore, further investigation of ferroptosis-mediated processes and identification of corresponding inhibitory approaches hold promise for repairing skin damage. Senkyunolide I (Sen I), a bioactive component mainly extracted from the traditional Chinese medicinal plants, Ligusticum chuanxiong Hort. and Angelica sinensis (Oliv.) Diels, has demonstrated efficacy in combating oxidative stress and inflammation. In this study, we utilized UVB-irradiated HaCaT cells as an in vitro model and C57BL/6J mice as an in vivo model of solar dermatitis. Our findings revealed the pivotal roles of autophagy and ferroptosis in inducing skin inflammation, particularly emphasizing the activation of ferroptosis through macroautophagy. Surprisingly, this mechanism operated independently of ferritinophagy, a classical autophagy-driven ferroptosis pathway. Instead, our results highlighted Transferrin Receptor 1 (TfR1), tightly controlled by autophagy, as a crucial mediator of ferroptosis execution and amplifier of subsequent lethal signals. Furthermore, extracellular High Mobility Group Box 1 protein (HMGB1), released following UVB-induced ferroptotic cells from activated autophagic flux, initiated a feedback loop with TfR1, propagating ferroptosis to neighboring cells and exacerbating damage. Remarkably, Sen I administration showed a significant protective effect against UVB damage in both in vitro and in vivo models by interrupting this cascade. Consequently, we have illuminated a novel therapeutic pathway post-UVB exposure and identified Sen I as a potent natural molecule that safeguarded against UVB-induced solar dermatitis by suppressing the autophagy-ferroptosis-HMGB1-TfR1 axis, highlighting a new frontier in photoprotection.
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Nanoscale
·
2025
·
IF 5.1
Rong Wu,Yansong Yue,Aosheng Zhang,Jing Wei,Fangze Liu,Hongbo Li
Metal halide perovskites are promising materials for next-generation X-ray detectors. Among these materials, CsPbBr3 single crystals (SCs) exhibit high environmental stability, low defect density and high X-ray absorption coefficient, demonstrating excellent X-ray detection performance. However, ion migration in CsPbBr3 induces dark current drift, leading to degraded photocurrent and increased detection limit. Doping CsPbBr3 SCs with mixed halide has emerged as an effective strategy to suppress ion migration, increase resistivity and improve detection sensitivity. In this study, we synthesized lightly doped mixed-halide perovskite CsPb(Br1−nXn)3 (X = Cl, I) SCs with high crystallinity and compositional uniformity using the inverse temperature crystallization method and systematically studied hole and electron transport properties. Our findings indicate that the dark current primarily arises from hole current driven by ion migration associated with halide vacancies. Both chlorine and iodine doping suppress ion migration, with iodine doping exhibiting the best inhibiting effect. With low work function contacts, electron dark current is substantially reduced due to the elimination of hole contributions, and the dark current drift is effectively suppressed. Electron transport dynamics were further explored through α-particle spectroscopy. Analysis of α-particle spectra and carrier transit times revealed that chlorine doping enhances the μ-τ product and charge collection efficiency, whereas light iodine doping results in reduced μ-τ product and slower charge transport. Overall, halide doping combined with contact engineering demonstrates that mixed-halide perovskites hold significant promise for developing high-performance X-ray detectors.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Pengyao Guo,Yuan Qin,Yujie Fang,Lei Ding
This study presents the rational design of a magnetically recoverable CoFe 2 O 4 /BiVO 4 @g-C 3 N 4 (CFO/BVO@CN) ternary heterojunction for highly efficient levofloxacin (LVFX) degradation via peroxymonosulfate (PMS) activation under visible light. The key innovation lies in the synergistic integration of a unique charge transfer pathway with interfacial M-N (M = Co, Fe, Bi, V) chemical bonding, as unequivocally evidenced by XPS. This atomic-level interfacial engineering creates efficient electron channels that not only promote the spatial separation of photogenerated carriers but also dramatically accelerate the dual redox cycles of metal species (Co 2+ /Co 3+ , Fe 2+ /Fe 3+ ).Crucially, the V 4+ /V 5+ pair functions as an efficient electron shuttle, facilitating the rapid regeneration of PMS-active Co 2+ and Fe 2+ sites and sustaining a high-efficiency catalytic process. Consequently, the optimized system achieves an exceptional LVFX removal rate of 98.8% within 30 min, driven predominantly by singlet oxygen ( 1 O₂) and superoxide radicals ( • O 2 − ). The catalyst demonstrates robust stability over multiple cycles, facile magnetic separation, and effective detoxification of LVFX. This work provides a novel paradigm for developing multifunctional photocatalytic systems by marrying heterojunction engineering with atomic-level interface modulation for sustainable water purification.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huan Su,Chao Shan,Xiaolin Zhang,Bingcai Pan
Chemical oxidation is essential in treating P(I)/P(III)-bearing wastewater, while conventional oxidation processes suffer from low selectivity and high cost induced by oxidant reagents. Herein, a low-cost catalyst PdNi 10 was developed to rival the noble metal Pd, which had been known as the only catalyst enabling chemical-free oxidation of P(I)/P(III) into P(V) by ambient O 2 . The PdNi 10 fabricated via optimized method even outperformed Pd in catalytic activity at identical dosage (0.10 g L −1 ), achieving efficient conversion of 1.00 mM of P(I) into P(V) (>94% in 30 min) with wide applicable pH range from 3.0 to 9.0. The aerobic oxidation of P(I) and P(III) over PdNi 10 was confirmed via scavenging experiments to be both dominated by non-radical pathways with apparent activation energies of 44.5 and 21.3 kJ mol −1 , respectively. Interestingly, the individual roles of Ni components of PdNi 10 in the catalytic oxidation were found negligible. The H 2 O-methanol binary solvent experiment suggested that H 2 O mediated the catalytic reaction and the interfacial OH groups as a result of H 2 O dissociation served as the main reactive oxidant species for P(I)/P(III) oxidation. Furthermore, synergistic mechanism was proposed for the Ni and Pd sites with favorable roles in the essential reaction steps of dehydrogenation and hydroxylation, respectively. This study is believed to advance the treatment strategy of P(I)/P(III)-rich wastewater and to shed new light on the development of low-cost catalysts enabling chemical-free aerobic oxidation processes under facile condition.
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