Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Xingyu Zhan,Yunxiong Zeng,Hao Zhang,Xinqing Wang,Dingfen Jin,Hongxiao Jin,Shenglian Luo,Liming Yang,Bo Hong
Carbon nitride photoactivity is limited by poor light utilization, rapid recombination of electron-hole ( e - -h + ) pairs, and sluggish surface/interface reaction. Surface/interface modification is a promising strategy to get rid of these restrictions. Therefore, understanding surface/interface properties is highly worth in-depth consideration to improve carbon nitride photoactivity. Herein, the nitrogen-vacancy (Nv) and oxygen substitution (Os) co-modified carbon nitride coral-like array were rationally designed by a combination of thermal calcination and hydrothermal process. Results verified Nv extended the adsorption edge toward visible light and hampered the recombination of e - -h + pairs and Os accelerated surface/interface kinetics. In consequence, the optimized photocatalyst (Nv, Os)-CN-6 can degrade 80 % of tetracycline (TC) with the pseudo-first-order kinetic constant of 0.124 min −1 , 13.8-fold higher than pristine carbon nitride. Furthermore, Nv and Os can well resist the toxic effect of interfering agents in simulated practical wastewater. Finally, Nv and Os endow (Nv, Os)-CN-6 mineralizing TC with low/non-ecology-risk intermediates evolution based on the HPLC-MS and T.E.S.T. software simulation. This study provides new insights into the rational design of carbon nitride for photodegrading TC.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Xin Yu,Chao Zhou,Zhanhua Huang,Changhui Xin,Yanjing Lin,Fengdan Fu,Shijie Li,Weiping Zhang
Achieving high-efficiency charge separation and strong oxidizing capacity are of great significance for photodegradation of organic pollutants . Herein, novel self-doped Zr 3+ -ZrO 2 nanoclusters and AgCl@Zr 3+ -ZrO 2 heterostructures with high surface areas were fabricated for photodegradation of organic pollutants under visible-light illumination. The experimental results revealed that self-doped Zr 3+ -ZrO 2 clusters were formed during a carbothermal reduction process, and the adsorbed surface chlorine promoted the adhesions of Ag + to form AgCl over the surface of Zr 3+ -ZrO 2 clusters. The obtained AgCl@Zr 3+ -ZrO 2 heterojunctions displayed ultrahigh-performance degradation of norfloxacin under visible-light illumination, and the prepared AgCl@Zr 3+ -ZrO 2 -11 heterojunction presented the highest photocatalytic performance with a rate constant of 0.21989 min −1 , which was approximately 62.12 times that of Zr 3+ -ZrO 2 clusters and 21.95 times that of AgCl and far better than that of commercial ZrO 2 . The formation of Zr 3+ self-doping, strongly combined interfaces, and high surface areas highly promoted charge separation for highly enhanced photodegradation of organic pollutants.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Huayi Cai,Jingjing Wang,Zhao Du,Zhiyuan Zhao,Yaxin Gu,Zhonglu Guo,Yang Huang,Chengchun Tang,Guifeng Chen,Yi Fang
Photocatalysis has attracted much attention in the field of environmental remediation. However, the photocatalytic performance largely depends on efficient charge migration and solar light utilization. Herein, the ternary MoSe 2 /ZnO/p-BN (MZB) photocatalyst was successfully designed and synthesized. The degradation rate of the optimal sample 30 wt% MZB for ofloxacin (OFL) under visible light irradiation can reach 99.2%, and the photocatalytic reaction rate is 5.33 times and 2.10 times higher than that of pure ZnO and ZnO/p-BN. In the MoSe 2 /ZnO/p-BN system, p-BN can achieve the enrichment of pollutant to accelerate the catalytic rate, while the hybridization of MoSe 2 expands the spectral response of the catalysts. In addition, the formation of stepped electron transport routes reduces the electron-hole pair recombination rate. The active species quenching experiments reveal that e - , •O 2 − , h + and •OH play a major role in the removal of antibiotic contaminants. The analysis of OFL degradation intermediates reveals the possible degradation pathways and proposes a reasonable photocatalyst mechanism. Therefore, this work provides new ideas for designing high-performance visible light responsive photocatalysts for pollution treatment.
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Journal of the Taiwan Institute of Chemical Engineers
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2023
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IF 5.7
Qingfeng Cui,Xinyue Gu,Yue Zhao,Kezhen Qi,Ya Yan
Background In last few years, the researchers from different communities are focusing the wastewater treatment of medical and aquaculture industry. More importantly, the antibiotic released from the hospitals and aquaculture badly effecting water bodies. Methods In this work, a series of CuInS 2 /ZnS (CIS/ZnS) heterojunction nanomaterials are prepared through solvothermal method and analyzed using different techniques. The photocatalytic behavior of CIS/ZnS heterojunctions in the degradation of tetracycline hydrochloride (TCH) is investigated under visible light irradiation. Significant findings The results show that up to 86% of TCH degrades in 3 h with the optimized CIS/ZnS(1:2) sample. The enhanced photocatalytic activity is attributed to the formation of S-scheme heterojunctions, which promotes charge separation and transportation in CIS/ZnS composite materials. The photocatalytic mechanism is elucidated based on the electron paramagnetic resonance technique, optical properties and charge/radical trapping experiments. The visible-light absorption ability is enhanced, and superoxide radical ( • O 2 − ) is confirmed to be one of the main active species according to active substance capturing experiments. The high stability of CIS/ZnS composite provides a new way to design effective photocatalysts for the eradication of hazardous materials from environment.
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Advanced Electronic Materials
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2023
·Vol. 9
·期 3
·2201222
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IF 6.2
Kewen Tao,Chenwei Xiong,Jiachun Lin,Decai Ma,Shaopeng Lin,Biao Wang,Huashan Li
Self-powered halide perovskite X-ray detectors have evoked busting interests because they present outstanding properties such as low power consumption, high sensitivity, and integrability without external power source. Nevertheless, existing self-powered X-ray detectors exhibit low sensitivity due to the insufficient charge separation and transport. Herein, a self-powered photodetector for sensitive X-ray and photodetection based on single-crystalline perovskite FAPbBr 3 /NiO x heterostructure is demonstrated. The built-in field of FAPbBr 3 /NiO x heterojunction provides a driving force for separation and transport of photoexcited carriers. Without an external power supply, the photodetector presents excellent photoresponse performance under 450 nm light illumination, including high photoresponsivity (123.6 mA W −1 ), good detectivity ( D = 7.1 × 10 11 Jones), and ultrafast response/recovery time (10/200 ns). Simultaneously, the device achieves photovoltaic effect of 0.80 V and a large mobility–lifetime product of 1.1 × 10 −3 cm 2 V −1 , which enable a superior X-ray sensitivity of 402 µC Gy air −1 cm −2 at zero bias voltage. These results imply that the simple combination of perovskite single crystal and a hole transporting layer provides a flexible platform for the realization of energy-saving self-powered photodetector in visible light and X-rays.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jie Zhao,Yunning Chen,Renquan Guan,Xueying Cheng,Zhengkai Wu,Nana Zhao,Qingkun Shang,Yingnan Sun
In this paper, we successfully constructed two composite photocatalysts TiO 2 @PDI-NapSO 3 H and Fe-TiO 2 @PDI-NapSO 3 H by utilizing water-soluble PDI derivatives to bond with TiO 2 or iron-doped TiO 2 . Their photocatalytic performance to degrade phenol and diclofenac sodium (DCF) under visible light were investigated. The results show that PDI-NapSO 3 H can effectively improve the optical absorption properties of TiO 2 . Furthermore, the oxygen vacancy produced by doping of Fe in TiO 2 prevents the recombination of photogenerated carriers effectively. The larger conjugate plane of PDI-NapSO 3 H provides a convenient channel for the migration and separation of photogenerated carriers. Thus almost 99 % of phenol or DCF can be degraded by Fe-TiO 2 @PDI-NapSO 3 H within 90 or 120 min, respectively. However, the photocatalytic activity of Fe-TiO 2 @PDI-NapSO 3 H is better. The rate of phenol degradation is much higher than that of TiO 2 @PDI-NapSO 3 H. Further, through the photoelectric response characteristic analysis, radical trapping experiment and EPR test, the effects mechanism of the energy band structure, photogenerated carrier separation efficiency on the photocatalytic performance of Fe-TiO 2 @PDI-NapSO 3 H were discussed. In addition, the possible degradation pathways of DCF and the reasons for the obvious reduction of environmental toxicity after photocatalytic degradation were proposed.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Liming Liu,Zhurui Shen,Can Wang
In this study, two kinds of 2D materials (nanoscale mono/multi-layer MXene) were prepared, and a new visible-light-driven photocatalyst MXene@In 2 S 3 was synthesized by one-step hydrothermal preparation. Due to the better conductivity and larger specific surface area of the monolayer MXene, monolayer MXene@In 2 S 3 exhibited greater transient response photocurrent and smaller interfacial charge transfer resistance than those of multilayer MXene@In 2 S 3 under visible light irradiation. All these indicated that the synergistic effect of type-II heterojunction and TiO 2 /Ti 3 C 2 T x interface provided a shorter and more direct channel for electron transfer between In 2 S 3 , TiO 2 and MXene. When bioaerosol was sterilized by dynamic continuous flow photocatalytic reactor carrying monolayer MXene@In 2 S 3 , it can reach 1.55 lg in 9.6 s (multilayer MXene@In 2 S 3 was 1.19 lg). Biological particles of different particle sizes were effectively removed from the bioaerosol. The excellent photocatalytic disinfection performance was due to the oxidation substances (holes, ·O 2 – and ·OH) produced by the photocatalyst under visible light irradiation. Microbial cell membrane permeability was disrupted, causing irreversible physical damage that will ultimately lead to sustained inactivation within 16 h. Due to the unique physical and chemical properties of the two-dimensional material MXene, it has scope for further exploration in the field of disinfection and air purification.
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DIAMOND AND RELATED MATERIALS
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2023
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IF 4.1
Afzal Ali,Adeel Ahmed,Muhammad Usman,Tahir Raza,Muhammad Safdar Ali,Abdulhmeed Al-Nahari,Changbao Liu,Dong Li,Chunhu Li
Unintentional leakage of dyes into the aquatic environment has exacerbated global contamination of water resources in recent years, posing a serious danger to aquatic life and human health. As a result, highly adaptable and effective measures are required to address the worldwide environmental challenge posed by dye usage. Herein, we have adopted hydrothermal technique to synthesize a visible light-induced catalyst based on the Ce 0.2 Co 0.8 Fe 2 O 4 /g-C 3 N 4 composite. The catalysts were characterized in terms of their morphological, structural, and photoluminescence properties. The photocatalytic proficiency of the Ce 0.2 Co 0.8 Fe 2 O 4 /g-C 3 N 4 composite was determined by its ability to degrade rhodamine B (RhB) under visible light irradiation. Ce 0.2 Co 0.8 Fe 2 O 4 /g-C 3 N 4 exhibited superior degradation potential, degrading RhB to 90.27 % in 60 min, compared to CoFe 2 O 4 /g-C 3 N 4 (72.28 %), Ce 0.2 Co 0.8 Fe 2 O 4 (64.45 %) and CoFe 2 O 4 (56.63 %) under predetermined reaction conditions (catalyst dosage = 0.4 g/L, RhB concentration = 20 mg/L, pH = 7, T = 25 ± 1 °C). The substantial increase in photocatalytic potential was attributed mostly to the interfacial migration of photo-induced charge carriers from g-C 3 N 4 to Ce 0.2 Co 0.8 Fe 2 O 4 , which may facilitate electron migration. The as-synthesized catalyst demonstrated outstanding stability in four successive cycles. This study may provide a low-cost approach for fabricating visible-light responsive catalysts for use in environmental remediation applications.
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JOURNAL OF LUMINESCENCE
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2022
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IF 4.171
Xi Zhang,Song Qing,Yi Qin,Qiang Zhou,Jing Wan,Huaijun Tang,Zhenglian Wang
Searching for efficient Mn 4+ red phosphors for white lighting and display backlighting has drawn great attention. In this work, an efficient Mn 4+ -doped fluoroscandate, Rb 2 KScF 6 :Mn 4+ , with short fluorescence lifetime is prepared via a facile co-precipitation method. It was found that the nonequivalent occupation of Mn 4+ for Sc 3+ leads to the identifications of sharp red emissions, enhanced zero-phonon line, high quantum efficiency and short fluorescence lifetime upon blue light excitation. Thanks to the luminescent properties, good optical parameters of high color rendering index, low correlated color temperature, and acceptable color gamut were achieved by coating the red Rb 2 KScF 6 :Mn 4+ phosphor with yellow Y 3 Al 5 O 12 :Ce 3+ or green β -SiAlON:Eu 2+ phosphor in various white light-emitting diodes, demonstrating its potential role for white light illumination and backlight display applications.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yong Liu,Le Zhang,Ting Liu,Jianlong Wang
The selective oxidation of ammonium nitrogen (NH 4 + -N) to dinitrogen (N 2 ) by advanced oxidation processes (AOPs) is of paramount significance, but it is still a great challenge. In this study, a novel composite (FeO x -MgO) was synthesized to activate persulfate (PS) for selective oxidation of ammonium (NH 4 + ) to N 2 under simulated solar-light irradiation ( hv ). The results demonstrated that the conversion of NH 4 + to ammonia (NH 3 ) on the basic sites of FeO x -MgO was a key step for the selective oxidation of NH 4 + . Fe(IV) species formed in FeO x -MgO/PS/ hv system could enhance both the efficiency and N 2 selectivity of the NH 4 + -N oxidation through the oxidation of ammonia hydride to N 2 . The 100 % NH 4 + -N removal and over 95.5 % N 2 selectivity could be achieved after 30 min when initial pH was in range of 2–10, and the initial NH 4 + -N concentration was 30 mg N/L. This study could provide a promising technology for the selective oxidation of NH 4 + -N to N 2 in water and wastewater.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Jian Liu,Baoheng Yin,Shuang Li,Lian Mi,Guanghao Yin,Feng Li,Lingmei Zhong,Na Bai,Xue Li
Reactive oxygen species (ROS)-based photodynamic therapy (PDT) and heat-based photothermal therapy (PTT) have garnered significant attention for their non-resistant and minimally invasive characteristics in the treatment of bacterial infections. However, the excessive generation of ROS during treatment can lead to persistent levels of oxidative stress, causing irreversible damage to surrounding tissues. In this study, we successfully synthesized a multifunctional nanocomposite consisting of hollow interior and porous surface nanostructured copper sulfide (Nano CuS) loaded with Rutin, a compound known for its ROS scavenging properties. This nanocomposite effectively eliminates bacteria through PDT and PTT in the initial stage, while simultaneously releasing Rutin to clear ROS at the site of inflammation. This dual therapeutic approach provides antimicrobial and anti-inflammatory effects, making it a promising strategy for combating bacterial infections. Overall, our synthesized nanomaterial demonstrates excellent efficacy in antibacterial and anti-inflammatory applications, offering new insights for future developments in infection treatments.
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Small
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2023
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IF 13.3
Zifu Qi,Longfei Yuan,Weigang Ding,Zhanpeng Qin,Shirong Wang,Hongli Liu,Xianggao Li
Quasi-2D (Q-2D) perovskites with typical varied n-phase structures deserve promising candidates in pursuing high-performance perovskite light-emitting diodes (PeLEDs). Whereas their weakness in precise n -phase distribution control disables the optical property of PeLEDs since the n = 1 phase is dominated by severe nonradiative recombination. Here, an effective phase distribution tailoring strategy is developed for pure blue PeLEDs by introducing taurine (TAU) into mixed halide Q-2D perovskites. The sulfonic acid group in TAU can coordinate with Pb 2+ to suppress the formation of the n = 1 phase while promoting the growth of Q-2D perovskites into domains with the graded distribution of n = 2 and 3. The amino group in TAU forms hydrogen bonds with electronegative halide ions, suppressing the formation of halide vacancies and reducing the defect density in the Q-2D perovskite films. As a result, optimized blue Q-2D perovskite films boosted PLQY to 92%. Target blue PeLED was endowed with a peak EQE of 14.82% (average 12.6%) at 475 nm and a maximum luminance of 1937 cd m −2 , which is among the reported high-level pure blue PeLEDs. This work demonstrates a feasible approach to regulate the phase distribution of Q-2D perovskites for high-performance blue PeLEDs.
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