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5 protocols using sodium borohydride

1

Photocrosslinkable Hydrogel Characterization

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Sodium borohydride (99%), nitrobenzoylhydrazide (99.8%), alginage (98%) Na2HPO4 (99%), NaH2PO4 (99%) and dimethylsulfoxide (DMSO, 99.9%) were purchased form Adamas (Basel, Switzerland). N-hydroxysuccinimide (NHS, 99%) and N-ethyl-N’-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC, 99%) was purchased from J&K (Beijing, China). The double-distilled H2O (ddH2O) was purified by a Synergy (Milipore, Burlington, MA, USA). The synthesized 4,4’-azobis(benzoylhydrazide) was characterized by a JNM-ECX400S (JEOL, Tokyo, Japan). The FTIR spectra was achieved by a Nicolet iS 10 Fourier transform inferred spectrometer (ThermoFisher, Waltham, MA, USA). The mechanical properties of the gel were measured by a TA DHR rotational rheometer (TA, Newcastle, DE, USA), and 450 nm light and 365 nm light irradiation of the gel was carried by a light curing lamp equipped with 365 nm LED (20 W, 809 mW/cm2) and 450 nm LED (20 W, 809 mW/cm2) purchased from Shenzheng Bashuguang Zhaoming Co. (Shenzheng, China).
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2

Synthesis of Gold Nanoparticles

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All chemicals are analytically pure and can be used directly without further purification. 1,2-Dimethylimidazole, sodium borohydride (NaBH, 98.0%) and hydrogen tetrachloroaurate trihydrate (HAuCl4·3H2O, 99.9%) were from Shanghai Adamas Reagent Co., Ltd, China. Zinc acetate dihydrate (C4H6O4Zn·2H2O, 99.0%) was purchased from Shanghai Titan Technology Co., Ltd., (Greagent), China. Methanol (CH3OH, 99.9%) and C2H5OH (99.7%) were from Tianjin Fuyu Fine Chemical Co., Ltd., China, and homemade deionized water.
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3

Synthesis of Metalloporphyrin Catalysts

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All chemicals were purchased from commercial suppliers without further purification unless mentioned otherwise. Tetrakis(4-carboxyphenyl)porphyrin (TCPP, 97%), 1-octanol (99%) and copper acetate monohydrate (Cu(CH3COO)2·H2O, 99%) were purchased from TCI. Hydrogen tetrachloroaurate trihydrate (HAuCl4·3H2O, 99.9%), sodium borohydride (99%), sodium citrate (99.8%), 4-nitrophenol (4-NP, 99%), and dimethylformamide (DMF, 99.8%) were purchased from Adamas.
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4

Synthesis of Bismuth Nanostructures

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Bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) and absolute ethanol (C2H5OH) were provided by Sinopharm Chemical Reagent Co., Ltd., Shanghai, China. Selenium powder, sodium molybdate dihydrate (Na2MoO4·2H2O), and sodium borohydride (NaBH4) were purchased from Shanghai Adamas Reagent Co., Ltd., Shanghai, China. Potassium chloride (KCl) was obtained from Shanghai Lingfeng Chemical Reagent Co., Ltd., Shanghai, China. All the reagents were analytically pure grade and used as received without further purification. Milli-Q water was homemade and the resistivity was 18.2 MΩ cm.
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5

Synthesis of PVA-Coated Silica Nanoparticles

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All chemicals were used in the same manner as received and were not further processed. Poly(vinyl alcohol) (PVA, 80% DA, 9–10 kDa), (3-mercaptopropyl) trimethoxysilane (MPTMS, 95%), ammonium hydroxide solution (28–30% NH3 basis), and cetyltrimethylammonium bromide (CTAB ≥ 98%) were purchased from Sigma-Aldrich. Sodium acetate, tetraethyl orthosilicate (TEOS), sodium borohydride (NaBH4), Au(iii) chloride hydrate (HAuCl4), 5,5′-dithiobis (2-nitrobenzoic acid) (DTNB2−) and 3,3′,5,5′-tetramethylbenzidine (TMB) were purchased from Adamas. Hydrogen peroxide (30%), methanol and ethanol (analytical purity) were purchased from Chengdu Dingsheng Times Company. Deionized (DI) water (>18.2 MΩ cm) was used for all experiments.
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