PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Fenglong Chen,Lingxin Meng,Hongqi Liang,Jingmei Xu
Sulfonated poly(arylene ether ketone sulfone)s (SPAEKS) were prepared by polycondensation reaction as polymer matrix. Dopamine hydrochloride was sulfonated and then modified onto the surface of the ceria (CeO 2 ) nanoparticles. The sulfonated dopamine ceria (SPD@CeO 2 ) was added to the polymer matrix as an inorganic nanofiller to prepare a series of composite membranes. The structure and morphology of modified inorganic nanoparticles and membranes were characterized and analyzed by means of SEM, 1 H NMR, PXRD and FTIR. Among all the composite membranes obtained, S-SPD@CeO 2 -2 (the quality of the SPD@CeO 2 percentage was 2%) had the most outstanding comprehensive performance. Oxidative stability of S-SPD@CeO 2 -2 reached 95.33% due to the free radical scavenging effect of CeO 2 . At 80 °C, 100% relative humidity (RH), the proton conductivity of S-SPD@CeO 2 -2 was 218.93 mS cm −1 . Meanwhile, this membrane also had good mechanical property (Young's modulus was 1332.59 MPa) and dimensional stability (swelling ratio was 34.34% at 80 °C). Besides, the maximum power density and open circuit voltage (OCV) of S-SPD@CeO 2 -2 membranes reached 445.48 mW cm −2 and 0.917 V. Both of the above results were better than pure membranes (304.45 mW cm −2 and 0.872 V). Comprehensive the above data, S-SPD@CeO 2 -2 had considerable potential for application as fuel cell diaphragm.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Henan Jia,Pei Su,Jiahang Fan,Taotao Guo,Yiming Zhang,Lingfen Miao,Lei Wan,Penghui Yang,Mao-Cheng Liu
Yolk-shell-structured transition metal sulfides (TMSs)/carbon nanocomposites are highly desirable in advanced energy storage system, such as sodium-ion batteries (SIBs) and supercapacitors (SCs). Nevertheless, practical applications are still prevented by the loose attachment of TMSs with carbon caused by conversion stress, the aggregation of TMSs nanoparticles and the sluggish ion transport caused by high crystallinity of carbon. Here, the disperse hollow Co 9 S 8 nanoparticles encapsulated into N,S-codoped carbon nanotubes (CNTs) with poor crystallinity through Co N C bond was synthesized (CS-NSCNT) to overcome the above obstacles. The designed CS-NSCNT can provide the short diffusion path and prevent the huge volume expansion of conversion reaction. Moreover, the established Co N C bond endows the strong interaction and regulates the electronic structure thus promote the stability and rate performance effectively. The CS-NSCNT SCs’s electrode delivers a high specific capacitance of 1150 F g −1 at 1 A g −1 , with a high cycling life stability and rate performance. For SIBs, the CS-NSCNT cathode demonstrates an initial reversible capacity of 475 mAh g −1 at 0.1 A g −1 and an excellent rate performance with a capacity retention of 53 % at 10 A g −1 . This work may satisfy the long-stability, high-capacitance/capacity, high-power/energy density application requirements of future applications.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Huda D. Abdul kader,Saad H. Ammar,Waqar A. Abdulnabi,Zaid H. Jabbar,Haidar Taofeeq,A. Al-Farraji
The development of new and effective photocatalytic heterojunctions for green environmental remediation under visible-illumination has received great attention in recent years. Herein, we assembled BiVO 4 -decorated S-doped g-C 3 N 4 (BVO/SCN) heterojunctions with different BVO:SCN ratios (5 to 30 wt% BVO) to achieve effective photocatalytic heterojunctions for visible-light-prompted degradation of antibiotic TC in a three-phase split-plate airlift photocatalytic reactor, in which successfully reducing charge recombination rate. Obviously, BVO/SCN endorsed greater photodecomposition performance of TC under visible-light (decompose 95.7 % of TC in 60 min), which compared to SCN was approximately 5-times enhancement. The TC mineralization efficiency of BVO/SCN hybrid (84 % within only 60 min) was higher than that of the individual BVO and SCN. The efficient internal self-mixing generated in the airlift photocatalytic reactor greatly contributed to increasing the TC degradation efficiency by improving the mass transfer and the irradiation process of the mixture, in which the degradation efficiency increased from 88 % without airlift to 95.7 % in airlift reactor. On the other hand, the high degradation efficiency was credited to the extended absorbing of visible-light and great separation of photo-prompted carriers through the formation of Z-type heterojunction between BVO and SCN. As recorded by the trapping investigates, the • O 2 − and • OH radicals act as the main reactive-species in the TC photocatalytic degradation process. Moreover, High durability of the developed BVO/BCN heterojunctions was obtained, in which 89.4 % TC degradation was still recorded after five rounds.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Luping Feng,Enjun Chen,Xinfeng Li,Jianghong Wang,Yujie Fan,Leyao Jin,Peisong Tang,Lixiang Zhang
A bifunctional 0D-2D nanostructured S-scheme CdS-Bi 2 WO 6 heterojunction for highly efficient photoelectrochemical (PEC) detection coupled with the degradation of chlorpyrifos (CP) was prepared by hydrothermal growth of CdS quantum dots onto Bi 2 WO 6 nanosheets. It was uncovered that the so-obtained heterojunction composites notably minimized the recombination of photoinduced electron-hole pairs and exhibited much improved PEC responses compared to pristine Bi 2 WO 6 because of the in-situ formed internal electrostatic field between CdS and Bi 2 WO 6 components induced by the S-scheme heterostructure. After the addition of CP, the interactions between Bi sites and the P=S/C=N groups of CP specifically inhibited the photocurrent signals of obtained CdS-Bi 2 WO 6 sample, impeding the separation and transfer of photoinduced carriers. Significantly, it was found that the photo-generated holes in Bi 2 WO 6 and • OH radicals produced within the PEC system could effectively interact with CP molecule, enabling simultaneous catalytic degradation during detection process and the possible intermediates and degradation pathways of CP were explored and speculated. As a result, a bifunctional PEC platform was introduced for the sensitive and efficient detection and degradation of CP. This platform holds potential to offer theoretical support for the monitoring and remediation of other organophosphate pesticides like CP.
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ACTA PHYSICO-CHIMICA SINICA
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2025
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IF 13.5
Yi Yang,Xin Zhou,Miaoli Gu,Bei Cheng,Zhen Wu,Jianjun Zhang
Photocatalytic hydrogen peroxide (H 2 O 2 ) production is a crucial process for clean energy conversion, involving the reduction of O 2 through two electrons. However, this process is often hampered by the sluggish water oxidation involving the photogenerated holes. To address this challenge, we have constructed a dual-functional S-scheme ZnO/CdIn 2 S 4 heterojunction systerm coupling the H 2 O 2 generation with a value-added benzylamine (BA) oxidation reaction. In this dual-functional photocatalytic system, photogenerated electrons in CdIn 2 S 4 efficiently reduce O 2 to produce H 2 O 2 , while photogenerated holes in ZnO selectively oxidize BA to N-benzylidenebenzylamine. Leveraging the advantages of the S-scheme heterojunction, the optimized ZnO/CdIn 2 S 4 photocatalyst displays an enhanced H 2 O 2 production rate (386 μmol·L −1 ·h −1 ) and BA oxidation fraction (81%) than pure ZnO or CdIn 2 S 4 . Femtosecond transient absorption (fs-TA) spectroscopy confirm the ultrafast S-scheme electron transfer from the ZnO conduction band (CB) to the CdIn 2 S 4 valence band (VB) upon photoexcitation of the ZnO/CdIn 2 S 4 composite. Besides, timely depletion of VB holes in ZnO and CB electrons in CdIn 2 S 4 can accelerate the interfacial electron transfer in the ZnO/CdIn 2 S 4 S-scheme heterojunction. The innovative design of the ZnO/CdIn 2 S 4 S-scheme photocatalyst provides new insights for developing efficient dual-functional heterojunction photocatalytic systems and introduces a novel method for studying S-scheme heterojunctions using fs-TA spectroscopy.
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VACUUM
·
2024
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IF 3.8
Wanli Zhang,Meigui Ou,Chunlin Yang
In this paper, sulfur and nitrogen co-doped graphene quantum dots (S, N -GQDs) were compounded with titanium dioxide (TiO 2 ) nanorods by chemical surface modification. S, N -GQDs in diameter of 5 nm are uniformly distributed on the surface of TiO 2 nanorod arrays. The presence of C S bonds in S, N -GQDs not only broaden the absorption of visible light by GQDs, but also enhanced the visible light absorption of S, N -GQDs/TiO 2 composites. The photocurrent densities of S, N -GQDs/TiO 2 were 3.66 times that of unmodified TiO 2 . The calculation results of density functional theory (DFT) showed that the band gap of S, N -GQDs is significantly reduced compared to GQDs, indicating that electrons are more likely to transit to higher energy levels and form more activation sites. Moreover, compared with TiO 2 , the DFT calculation results of band gap, density of states and charge density difference of S, N -GQDs/TiO 2 showed that S, N -GQDs/TiO 2 had a wide wavelength of visible light absorption and better electron-hole separation ability, resulting in the superior photoelectrocatalytic property. This research provides favorable analytical value for the development of photocatalysts based on heterostructures .
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Jun Zhu,Jun Chen,Jianan Chen,Jicheng Zhou,Wentao Xu
Direct decomposition of H 2 S into H 2 and S is an attractive alternative to the Claus process, because CO x -free H 2 and S can be simultaneously recovered from an abundant and toxic waste gas, which has huge social economic and ecological environmental benefits. However, it is still a great challenge to achieve the direct H 2 S decomposition reaction with high efficiency due to the thermal equilibrium limitation. Herein, a core-shell structured Mo x C@ZrO 2 was developed as novel microwave catalyst for microwave catalytic H 2 S decomposition. More specifically, the H 2 S conversion over Mo x C@ZrO 2 catalyst is as high as 99.9% at 650 °C, which immensely surpasses the H 2 S equilibrium conversion (6.1% at 650 °C). This study provides an effective strategy for the design of highly active microwave catalysts, and supplies a strategy for efficiently catalytic decomposition of H 2 S waste and recovering high-value hydrogen and sulfur at lower reaction temperatures.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·Vol. 141
·期 31
·e55738
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IF 2.7
Liangyong He,Yuqing Yang,Bin Yang,Weiqiang Hu,Zhengzhi Zheng,Tianyu Lu,Haijia He,Jiasheng Qian,Yaoyang Chen,Weiguo Zhang,Yuchao Ke
In recent years, optical diffusion film materials with high transmittance and high haze have been widely reported, while there is relatively rare research on their functionalization and practical application especially in real scenario. In this work, optical diffusion films using polymethyl methacrylate (PMMA)@TiO 2 @SiO 2 (P@T@S) composite microspheres were fabricated, which exhibited sufficiently high light transmittance and haze. The binding mode of PMMA microspheres and nanoparticles suggested that PMMA microspheres with a positive surface potential combined with nanoparticles with a negative surface potential through electrostatic attraction to achieve mutual binding. The prepared P@T@S composite microspheres showed better heat and swelling resistance than those of PMMA microspheres. The P@T@S diffusion film, whose excellent light diffusion effect was clearly demonstrated, exhibited the best optical performance among all optical diffusion films prepared. After passing through the P@T@S diffusion film, the laser light was not only uniform but also bright. The findings from this work can provide some insight into further research on optical diffusion films applied in optoelectronic device areas.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
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IF 5.7
Jiyuan Liu,Zhen Tian,Ruichi Li,Shujun Ni,Hong Sun,Fei Yin,Zhenyu Li,Yalin Zhang,Yifan Li
The overexpression of insect detoxification enzymes is a typical adaptive evolutionary strategy for insects to cope with insecticide pressure. In this study, we identified a glutathione S-transferase (GST) gene, PxGSTs1, that exhibited pronounced expression in the field-resistant population of Plutella xylostella. By using RNAi (RNA interference), the transgenic fly models, and quantitative real-time polymerase chain reaction (RT-qPCR) methods, we confirmed that the augmented expression of PxGSTs1 mediates the resistance of P. xylostella to various types of insecticides, including chlorantraniliprole, novaluron, λ-cyhalothrin, and abamectin. PxGSTs1 was found to bolster insecticide resistance in two ways: direct detoxification and enhancing antioxidative defenses. In addition, our findings demonstrated that pxy-miR-8528a exerts a pivotal influence on forming insecticide resistance in P. xylostella by downregulating PxGSTs1 expression. In summary, we elucidated the multifaceted molecular and biochemical underpinnings of PxGSTs1-driven insecticide resistance in P. xylostella. Our results provide a new perspective for understanding the insecticide resistance mechanism of P. xylostella.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xingyu Zhang,Chenliang Zhou,Shaoyuan Shi,Xuequan Jing,Zhi Zheng,Wenjing Yuan
Building narrow band gap semiconductors and fast separation of photogenerated electron-hole (e - -h + ) structures are of great significance for photocatalytic process. In this contribution, the CeO 2-x /C 3-y N 4 /Ce(CO 3 )(OH) double S-scheme heterojunctions with atomic vacancies tunable band gap (2.54 eV) have been designed and fabricated as a boost photocatalyst for enrofloxacin (ENR) photodegradation. Compared with the control samples, the experimental results indicate that the typical sample (CeO 2-x /C 3-y N 4 /Ce(CO 3 )(OH)-2) achieves the highest ENR photodegradation efficiency (93.6 %) in 240 min under a pH of 6, and the possible photodegradation pathways are also proposed. The superior performance is ascribed to the CeO 2-x /C 3-y N 4 /Ce(CO 3 )(OH) double S-scheme heterojunctions for selective recombination of photogenerated electrons with weak-reduction ability in conduction band (CB) of CeO 2-x , C 3-y N 4 and the photogenerated holes with weak-oxidation nature in valance band (VB) of C 3-y N 4 , Ce(CO 3 )(OH), which increase the retention rate of photogenerated electrons in CB of Ce(CO 3 )(OH) and photogenerated holes in VB of CeO 2-x to degrade ENR. This is the first systematic study of CeO 2-x /C 3-y N 4 /Ce(CO 3 )(OH) double S-scheme heterojunctions for ENR photodegradation.
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DYES AND PIGMENTS
·
2024
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IF 4.1
Song Wei,Xiang Luo,Shaofeng Shao,Lei Zhang
Machine learning-assisted synthesis of new materials has been an ongoing hot topic. Luminescent Ag–Zn–In–S quaternary semiconductor quantum dot thin films have great application potential in many fields because of their excellent photoelectric performance. In this study, an environmentally friendly ionic liquid-assisted approach was employed to prepare high-performance Ag–Zn–In–S luminescent thin films, and machine learning methods were applied to screen the optimal preparation conditions. The photoluminescence (PL) performance, crystal structure, and morphology of the thin films were also been studied. The initial data set was obtained by high-throughput experiments. By comparing machine learning algorithms of Xgboost, Random Forest, Bagging, SVM, Extra Tree, and Gradient Boosting, the Random Forest achieved the best accuracy (r = 0.84, R 2 = 0.847) and was selected to predict the optimal preparation conditions of Ag–Zn–In–S quaternary quantum dot thin films. The machine learning predicted results are in great agreement with the subsequent experimental results, which verifies the accuracy and effectiveness of the machine learning model. This study offers a theoretical foundation for preparing optimal inorganic quantum dot luminescent materials using machine learning.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Bo Zhang,Kang Li,Renfu Li,Shoufeng Wang,Longtian Kang
Here, 1D bis(N-carboxymethyl) peryleneimide (H 2 PDI), 0D 1,6,7,12-tetrachloro-bis(N-carboxymethyl) peryleneimide (4Cl-H 2 PDI), and 2D 4Cl-H 2 PDI/graphene quantum dot (4Cl-H 2 PDI/GQD) nanostructures are synthesized and carefully analyzed. The effect of bay-/end-substitution and S-scheme heterojunction of PDI-based materials as main catalysts on the photocatalytic H 2 O 2 evolution is first studied through the oxygen reduction reaction (ORR). Under the visible-light irradiation (> 420 nm), 4Cl-H 2 PDI and 4Cl-H 2 PDI/GQD as photocatalysts exhibit the ∼7 and ∼16 times H 2 O 2 evolution rate than H 2 PDI (1059.6 vs. 2484.0 vs. 160.0 µM g −1 h −1 ), respectively. The systematical experiments reveal that 4Cl-H 2 PDI and 4Cl-H 2 PDI/GQD should prefer a two-step single-electron ORR process, while H 2 PDI may involve a 4e ‒ water oxidation and one-step 2e ‒ ORR process. Further experiments confirm that the bay-substitution and GQD doping of H 2 PDI can promote the generation, transportation, and separation of photogenerated electrons and holes, and prolong the carrier lifetime. This work provides insight into PDI-based photocatalytic H 2 O 2 production.
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